365 results about "Lead titanate" patented technology

A method and apparatus for non-invasive measurement of living body information comprises a light source configured to generate light containing a specific wavelength component, an irradiation unit configured to irradiate a subject with the light, and at least one acoustic signal detection unit including piezoelectric devices formed of a piezoelectric single crystal containing lead titanate and configured to detect an acoustic signal which is generated due to the energy of the irradiation light absorbed by a specific substance present in or on a subject.

A nitrogen oxide storage material is disclosed which contains at least one storage component for nitrogen oxides in the form of an oxide, mixed oxide, carbonate or hydroxide of the alkaline earth metals magnesium, calcium, strontium and barium and the alkali metals potassium and caesium on a high surface area support material. The support material can be doped cerium oxide, cerium / zirconium mixed oxide, calcium titanate, strontium titanate, barium titanate, barium stannate, barium zirconate, magnesium oxide, lanthanum oxide, praseodymium oxide, samarium oxide, neodymium oxide, yttrium oxide, zirconium silicate, yttrium barium cuprate, lead titanate, tin titanate, bismuth titanate, lanthanum cobaltate, lanthanum manganate and barium cuprate or mixtures thereof.

An interposer, located between an integrated circuit having power, ground and signal connections and a ceramic substrate having power, ground and signal connections, that includes an oxide layer formed on a polished surface of a silicon substrate, a thin film dielectric capacitor formed on the oxide layer, a plurality of metallized that electrically connect to either of the electrodes of the thin film dielectric capacitor, and vias than conduct power, ground and signals between a the ceramic substrate and the integrated circuit. The interposer connects the metallized vias to the integrated circuit by solder connections and also connects the vias conducting power, ground and signals from the ceramic substrate to the interposer by solder connections. The dielectric of the thin film dielectric capacitor may be selected from the group of high-K titanates, such as, barium zirconate titanate, barium strontium titanate, pure barium titanate, barium titanate modified with Pb, Nb, W, Ca, Mg, and Zn, lead titanate, lead zirconate titanate, and polycrystalline lanthanum-modified lead zirconate titanate, or other high-K dielectrics, such as, lead niobate and its derivatives, and lead tungstate and its derivatives.

A pyroelectric infrared sensor device with improved sensitivity and relative detection rate and reduced manufacturing cost. The infrared sensor device includes a substrate of rectangular shape. The substrate is made of a pyroelectric material, such as tetragonal-system lead titanate pyroelectric ceramics. A pair of comb-shaped electrode patterns each having a set of parallel conductive open-ended fingers are disposed on the top surface of the substrate such that the open-ended fingers of one electrode pattern are spatially interdigitated in relation to those of the other. The paired comb-shaped electrodes have at least three finger pairs whereas the interelectrode distance corresponding to the gap between neighboring fingers is greater than 100 micrometers. These comb-shaped electrodes satisfying the criteria render the pyroelectric material, upon application of a DC voltage between them, substantially horizontally polarizable at or near the top substrate surface which acts as the infrared light receiving plane. An opposite electrode is on the entire bottom surface of the substrate. This electrode has portions insulatively overlapping the comb-shaped electrodes with the pyroelectric material being sandwiched therebetween.

The invention relates to a preparation method for a perovskite lead titanate single-crystal nanometer sheet. A hydro-thermal reaction method is adopted according to the preparation method. The preparation method comprises the following steps: taking titanium dioxide as a raw material; taking a potassium hydroxide aqueous solution as a hydro-thermal medium and dropwise adding a lead nitrate aqueous solution; and stirring, and then performing thermal treatment at high temperature, thereby obtaining the perovskite lead titanate single-crystal nanometer sheet with a two-dimensional laminated structure. The technical process of the preparation method has the advantages of simpleness, easiness in control, zero pollution, low cost and easiness in mass production. The prepared perovskite lead titanate single-crystal nanometer sheet with the two-dimensional laminated structure is high in purity and excellent in dispersibility.

The invention discloses a bismuth scandate-lead titanate high-temperature piezoelectric ceramic material. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material comprises a matrix with the chemical formula of xBiScO3-(1-x)PbTiO3 and bismuth trioxide (Bi2O3) in an amount which is less than 0.4 percent of the total weight of the matrix. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material is prepared by adding excess Bi2O3 into raw materials of Sc2O3, Bi2O3, Pb3O4 and TiO2 in the metering ratio according to the chemical formula of xBiScO3-(1-x)PbTiO3, wherein x is 0.35 to 0.38; and the using amount of the excess Bi2O3 is 0.1 to 0.4 percent of the total weight of the raw materials of Sc2O3, Bi2O3, Pb3O4 and TiO2 in the metering ratio according to the chemical formula of xBiScO3-(1-x)PbTiO3. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material solves the problems that ceramic sintering temperature is increased and piezoelectric and dielectric properties are reduced due to deviation of a stoichiometric ratio caused by bismuth volatilization in the sintering process of BSPT ceramic, and has high Curie temperature, excellent piezoelectric property and an actual application value in high-temperature electronic equipment. The invention also discloses a preparation method for the bismuth scandate-lead titanate high-temperature piezoelectric ceramic material. In the preparation method, the piezoelectric ceramic material is prepared by synthesizing and sintering at lower temperature, so production cost is reduced, process steps are simplified, and the material has actual application value.

The invention provides a method for preparing a piezoelectric-ferroelectric thin film, relating to the technical field of preparation of lead zirconate titanate ceramics and being realized by the steps of preparing a precursor solution, utilizing a PLD method to prepare a substrate and adopting a Sol-Gel method to prepare the piezoelectric-ferroelectric thin film on a PZT crystal seed layer. The invention utilizes a method combing PLD and Sol-Gel to prepare a PZT thick film, thus having strong applicability to different substrates; and the prepared PZT thick film has the obvious advantages of high preferred orientation, even crystal size and compact structure, and can be used for preparing a lead zirconate titanate thin film with the thickness of 3-6 microns, the residual polarization value Pr of 25-45 mu C / cm<2> and the coercive field Ec of 40-65 kV / cm. At the same time, the method in the invention has relative low cost, strong controllability of programs and high industrialized application value.

The invention provides a lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material and a preparation method thereof. The structure of the material is as shown in the following general formula: 0.05Pb(Sn1 / 3Nb2 / 3)O3-(0.95-x)BiScO3-xPbTiO3, wherein x and 0.95-x respectively represent the mole percentages of PbTiO3 and BiScO3; x ranges from 0.60-0.63. The invention further provides a preparation method of the high temperature piezoceramic material. According to the lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material provided by the invention, by changing the material system, the use amount of Sc is reduced compared with that of an existing piezoceramic material BiScO3-PbTiO3, the cost of industrial production is lowered, and under the condition that a relatively high Curie temperature is kept, the piezoelectric property of the material is further improved.

A method and apparatus for non-invasive measurement of living body information comprises a light source configured to generate light containing a specific wavelength component, an irradiation unit configured to irradiate a subject with the light, and at least one acoustic signal detection unit including piezoelectric devices formed of a piezoelectric single crystal containing lead titanate and configured to detect an acoustic signal which is generated due to the energy of the irradiation light absorbed by a specific substance present in or on a subject.

The invention relates to a method for preparing a perovskite structure lead titanate monocrystal nano rod. A titanium and lead oxyhydroxide mixed sediment for hydrothermal reaction is prepared by a two-step precipitation method. The method comprises the following steps: taking titanium sulfate as a raw material for precipitating titanium, taking lead nitrate as a raw material for precipitating lead and taking potassium hydroxide as a precipitating agent; precipitating titanium ions; precipitating lead ions; after the product is filtered and washed, obtaining the mixed sediment containing the titanium ions and the lead ions; mixing and dispersing the mixed sediment and the potassium hydroxide in deionized water; sealing the mixture in a reaction kettle; and carrying out hydro-thermal treatment at 160-240 DEG C for 5-48 hours to obtain the perovskite structure lead titanate monocrystal nano rod. The invention has simple technology process, no pollution and low cost and is easy to control and carry out mass production.

The invention relates to a ferroelectric piezoelectric ceramic with the characteristic of low sintering temperature. The compositions are (1-x-y)PbZrO3-xPbTiO3-yBi(Zn1 / 2Ti1 / 2)O3 and z weight percent of MnO2, wherein x is equal to between 0.30 and 0.50, y is equal to between 0.05 and 0.25, and z is equal to between 0.0 and 0.5. Oxide materials and the prior solid-state reaction electronic ceramic process are adopted to achieve the aim of sintering a compact piezoelectric ceramic chip at a low temperature between 900 and 1,000 DEG C. The PbZrO3-PbTiO3-Bi(Zn1 / 2Ti1 / 2)O3 ferroelectric piezoelectric ceramic is a single phase perovskite structure and has a 'hard' piezoelectric property. Presintering powder of the PbZrO3-PbTiO3-Bi(Zn1 / 2Ti1 / 2)O3 ferroelectric ceramic powder as a sintering auxiliary, and an electronic ceramic process of solid phase reaction are adopted so as to achieve the low temperature sintering of the strontium-doped lead zirconate titanate at a temperature of 1,050 DEG C as well as the modification of the piezoelectric property. The ferroelectric piezoelectric ceramic is particularly applicable to the manufactures of functional devices such as emission piezoelectric ceramic devices, low-temperature cofiring multi-layer ceramic piezoelectric drives, transformers, and transducers.

The invention relates to a method for preparing a lead titanate nano column automatically assembled by perovskite structure nano pieces. A titanium and lead oxyhydroxide mixed sediment for hydrothermal reaction is prepared by a two-step precipitation method. The method comprises the following steps: hydrolyzing tetrabutyl titanate by ammonia solution to precipitate titanium ions; introducing lead nitrate in the ammonia solution suspended with a titanium oxyhydroxide sediment to precipitate lead ions; after the mixed sediment is filtered and washed, mixing the mixed sediment, potassium hydroxide and deionized water; and carrying out hydro-thermal treatment in a sealed reaction kettle at 160-240 DEG C for 5-48 hours to obtain the lead titanate nano column automatically assembled by the perovskite structure lead titanate nano pieces. The lead titanate nano column is 5-20 microns in length and 0.4-1 micron in diameter, and the perovskite structure lead titanate nano pieces of the lead titanate nano column are 2-10 microns in thickness. The invention has simple technology process, no pollution as well as low cost and is easy to control and carry out mass production.

The invention discloses a lanthanum-zirconium-doped lead titanate ferroelectric thick film ceramic material and a preparation method thereof, wherein the composition of the material is (Pb1-XLax)(Zr1-YTiy)zO3, x is 0.03-0.15, y is 0.05-0.50, and z is 0.50-1.00. According to the present invention, lanthanum-zirconium-doped lead titanate powder is synthesized from raw materials such as PbO, La2O3, ZrO2 and TiO2 according to a solid-phase reaction method, a raw film is prepared through a casting molding process, and the raw film is subjected to glue removing sintering to obtain the lanthanum-zirconium-doped lead titanate ferroelectric thick film ceramic; and the thickness of the prepared PLZT thick film ceramic is 20-70 [mu]m, the prepared lanthanum-zirconium-doped lead titanate ferroelectric thick film ceramic has the properties of the relaxation type ferroelectric material, can bear the high electric field strength, has the excellent electrothermal effect, and can meet the electrothermal refrigeration device preparation requirements.

The composite material has the material composition including polyvinylidene fluoride (PVDF) 20-30 wt%, Terfenol-D 2-12 wt% and plumbum zirconate titanate (PZT) the rest, and is prepared through the steps of: weighing the material, PVDF, PZT and Terfenol-D; pressing tablet, lamination or painting to produce sheet, plating gold or silver electrode, and final polarization at 4000-5000 v voltage. The magnetoelectric composite material is easy to form and convenient in use.

The invention relates to the field of single donor-doped positive temperature coefficient thermal-sensitive ceramics, and discloses a single donor-doped positive temperature coefficient thermal-sensitive ceramic and a preparation method thereof. The preparation method comprises the following steps of (1) mixing and sintering BaTiO3 (barium titanate), PbTiO3 (lead titanate), TiO2 (titanium dioxide) and Nb2O5 (niobium pentoxide) for a first time, so as to obtain BaTiO3 and PbTiO3 mixed powder with a formula of Ba1-xPbxTiO3; (2) mixing and sintering the mixed powder, SiO2 and a manganese source for a second time, so as to obtain the single donor-doped positive temperature coefficient thermal-sensitive ceramic, wherein the usage amounts of BaTiO3 and PbTiO3 meet the formula of Ba1-xPbxTiO3, and x is equal to 0.15 to 0.25; corresponding to 100mol of Ba1-xPbxTiO3, the usage amount of TiO2 is 1 to 2mol, the usage amount of Nb2O5 is 0.08 to 0.1mol, the usage amount of SiO2 is 1 to 3mol, and the usage amount of MnO2 is 0.04 to 0.08mol. The single donor-doped positive temperature coefficient thermal-sensitive ceramic has the advantages that the positive temperature coefficient thermal-sensitive ceramic can be prepared by the single donor Nb2O5 doping; under the conditions of same batch and same formula, the resistance dispersion of a room-temperature resistor of a product is small, and the breakdown voltage is high.

The invention discloses a novel growth technology of relaxation ferroelectric mono-crystal PIMNT by using a Bridgman-Stockbarger method, belonging to the technical field of mono-crystal growth. The novel growth technology of the relaxation ferroelectric mono-crystal PIMNT comprises the steps of: regarding high-purity PbO, Nb2O5, In2O3, TiO2 and 4MgCO3.Mg(OH)2.4H2O as initial raw materials to prepare a PIMNT polycrystal material through a precursor step-by-step synthesis method, wherein the chemical constitution is xPb(In1 / 2Nb1 / 2)O3-yPb(Mg1 / 2Nb2 / 3)O3-(1-x-y)PbTiO3, where x=0.24-0.26, and y=0.43-0.45; selecting high-quality seed crystal in a [110], [111] or [001] crystallographic direction; adopting a single-layer or double-layer seamless platinum crucible to contain the seed crystal and a material ingot; putting the crucible after being sealed in a mono-crystal growth furnace; controlling the temperature of the furnace at 1350-1400 DEG C; adjusting the position of the crucible to enable the material ingot to be welded with the top part of the seed crystal so as to form a steady solid-liquid interface with a temperature gradient of 20-50 DEG C; and growing the mono-crystal at a dropping speed of the crucible of less than 1 mm / h to obtain a high-quality and large-size PIMNT mono-crystal. The novel growth technology of the relaxation ferroelectric mono-crystal PIMNT, disclosed by the invention, has the advantages of overcoming a leakage phenomenon of a high-temperature lead-rich melt, avoiding volatilization of components of the melt, and particularly lead oxide steam, efficiently solving a poly-crystallized growth problem of a solid solution with composition complexity, and being suitable for growing high-quality and large-size PIMNT mono-crystals in batches.

The invention relates to a method for producing ferric acid bismuth lanthanum-lead titanate solid solution ceram in an intense magnetic field, belonging to the technical field of inorganic non-metal material and solid solution ceram material. The designed chemical formula of ferric acid bismuth lanthanum-lead titanate solid solution ceram is: (1-x)(Bil-yLay)FeO3-xPbTiO3; wherein: 0.2<=x<=0.6, y=0-0.4; weighing and preparing materials according to the chemical dosage rate of the chemical formula; weighing and mixing the Bi2O3, La2O3, Fe2O3, PbCO3 and TiO2 powder with a purity more than 99.9%, adding ethanol as abrasive, zirconia grain as abrasing medium; ball milling for 24 hours in the ball mill, mixing sufficiently and levigating; calcining and synthesizing in 750 DEG C in the magnetic intensity of 7-14T for 24 hours; ball milling for 24 hours; then doing a secondary ball milling; then prilling, tabletting; finally sintering the pressed compact in 1080-1100 DEG C, meanwhile introducing the intense magnetic field and obtaining the ferro-electricity ferromagnetism ceramic material.

The invention relates to a nano lead zirconate titanate / cement piezoelectric composite material used in civil engineering sensors and preparation method thereof. The piezoelectric composite material is composed of nano lead zirconate titanate and cement. The preparation method comprises: blending uniformly nano lead zirconate titanate powder and cement powder and water, pressing the mixture in disc shape, then hydrating, drying. The processed material through polarizing and ageing can be used for preparing civil engineering sensors. The piezoelectric composite material of the invention has better connectivity and well piezoelectric response.

A melt method for growing the sosoloid monocrystal of lead lead-titanate niobium-zincate, (1-x)Pb(Zn1 / 3Nb2 / 3)O3-xPbTiO3 where x=0.05-0.2, features that the raw material is pretreated by two steps andther PZNT monocrystal is grown by heterosyntectonic crucible lowering method, where PMNT sosoloid monocrystal is used as seed, temp is 1380-1420 deg.C, the temp gradient at growth interface is 40-80 deg.C and lowering speed is 0.5-1 mm / hr.

The invention discloses a titanium dioxide / lead titanate compounded nanometer photocatalyst and a preparation method thereof. The titanium dioxide / lead titanate compounded nanometer photocatalyst is a heterogeneous structure material formed by distributing titanium dioxide nano particles on the surface of lead titanate nano sheets. The preparation method comprises the following steps of dispersing lead titanate nano sheets synthetized through a hydrothermal method into deionized water; preparing a titanium source water solution; and dropwise adding the titanium source water solution into the lead titanate nano sheet water solution, then transferring into a hydrothermal reaction kettle, after hydrothermal reaction, cooling to room temperature, filtering, washing, and drying. The preparation method is simple and easy to control, and has low requirement on equipment; and the prepared titanium dioxide / lead titanate compounded nanometer photocatalyst can be used for regulating the ultraviolet light catalysis of the titanium dioxide into visible light catalysis.

The invention provides a touch panel and a manufacturing method thereof. The touch panel is composed of a plurality of basic sensing units which are arranged in an array mode. Each basic sensing unit comprises a pressure sensing transistor and a selecting transistor. Each pressure sensing transistor comprises a first electrode, a second electrode, a grid electrode, a light shading layer, a channel connected with the first electrode and the second electrode, an insulation layer formed on the channel, and a piezoelectric material formed on the insulation layer, wherein the piezoelectric material comprises polyvinylidene fluoride, lead titanate zirconium, zinc oxide, barium titanate, lithium niobate and lead titanate. Each selecting transistor comprises a first electrode, a second electrode and a third electrode, wherein the first electrode of each selecting transistor can be connected with a sensing electrode of the touch panel, the second electrode of each selecting transistor can be connected with the first transistor of the corresponding pressure sensing transistor, and the third electrode of each selecting transistor is a grid electrode and can be connected with a drive electrode of the touch panel.

The invention discloses a lead lutetioniobate-lead magnesioniobate-lead titanate ternary-system relaxation ferroelectric monocrystal and a preparation method thereof. The chemical general formula of the monocrystal is xPb(Lu1 / 2Nb1 / 2)O3-yPb(Mg1 / 3Nb2 / 3)O3-(1-x-y)PbTiO3, wherein 0.1<=x<=0.4, 0.2<=y<=0.6, but 1-x-y is not equal to 0. The PLMNT monocrystal is prepared by a crucible descent method. The invention effectively overcomes the defect of overlow Curie temperature in the PMNT monocrystal and the defects of difficulties in crystallization and mass growth in the PLNT monocrystal in the prior art. The PLMNT monocrystal disclosed by the invention has great application potential at room temperature, is very applicable to high-temperature devices, has wide application temperature range, and can completely satisfy the application requirements in high technologies, such as ultrasonic imaging, ultrasonic motors and the like, thereby having very wide application prospects.

The invention relates to a process for preparing piezoelectric material with three-layer structure of quartz / lanthanum nickelate / bismuth ferric-lead titanate, belonging to the technical field of inorganic piezoelectric material preparation process. The invention coats a bismuth ferric-lead titanate film on a quartz glass substrate through the sol-gel process, and introduces a lanthanum nickelate layer between the quartz glass substrate and the bismuth ferric-lead titanate film as a bottom electrode, thereby realizing the double gains and characterization of the optical and electrical performances of the bismuth ferric-lead titanate film on the quartz glass substrate. Piezoelectric material with SiO2 / LaNiO3 / BiFeO3-PbTiO3 three-layer structure which is prepared by the invention has excellent optical and electric performances, and can be used as memory storage materials and sensitized component materials.

The invention relates to a method for preparing a high-performance inorganic / organic composite multilayer dielectric film by a surface coating process. According to the process, bonding agents, functional particles, dispersing agents, anti-foaming agents and the like are used and are proportioned; an obtained material is coated onto the surface of various high-molecular polymer films; the coatinglayer thickness is controllable; the functional inorganic particles comprise barium titanate, zirconium doped barium titanate, lead zirconate titanate, titanium dioxide, aluminum oxide, silicon dioxide, boron nitride, copper calcium titanate and the like; the particle size is from the nanometer grade to the micrometer grade. The multilayer film can be formed by two layers or three layers; one layer is a pure polymer film; the other one layer or two layers are inorganic / organic composite layers; the composite layers are positioned on the surface of the pure polymer layer. The high-performance multilayer dielectric film obtained by using the method has excellent dielectric performance, polarization energy storage characteristics, heat conduction performance, heat resistant performance and the like; a novel material is provided for the high-performance energy storage film capacitor; the method can be widely applied to the fields of strong current and weak current products, new energy source automobiles, electromagnetic ejection pulse devices and the like.

The invention relates to a preparation method of a perovskite phase lead titanate-strontium titanate monocrystal nanometer material with a core-shell structure. The preparation method comprises the steps of taking a monocrystal single-domain perovskite phase lead titanate nanosheet as a template and a raw material, taking tetrabutyl titanate as a titanium source, taking strontium nitrate as a strontium source, taking sodium hydroxide as a precipitant and a mineralizing agent, and preparing precursor mixed turbid liquid for a hydrothermal reaction under the condition of magnetic stirring; sealing the precursor mixed turbid liquid into a stainless steel reaction still having a teflon liner, and obtaining a core-shell structure perovskite phase lead titanate-strontium titanate monocrystal nanometer composite structure through subjecting to hydro-thermal treatment at the temperature of 160 to 220 DEG C for 4 to 24 hours. The preparation method provided by the invention is simple in technical process, easy to control, free of pollution, low in cost, and easy for mass production. The prepared perovskite phase lead titanate-strontium titanate monocrystal nanometer composite structure has a clear core-shell structure, and has an interface with atomic resolution.

The invention relates to a carbon nano tube / lead zirconate titanate / cement piezoelectric composite material for a civil engineering sensor and a preparation method thereof. The piezoelectric composite material consists of the carbon nano tube, the lead zirconate titanate and cement. The preparation method comprises the following steps: evenly mixing the carbon nano tube, lead zirconate titanate powder and cement powder; shaping the mixture with water; and hydrating and drying the mixture. The material can be used for preparing the civil engineering sensor after polarizing and aging. The piezoelectric composite material has excellent piezoelectric responsivity.

The invention discloses a lithium-sulfur battery composite positive electrode material. Graphene oxide is used as a matrix of the battery positive electrode material, a graphene / ferroelectric composite material is obtained after the graphene oxide and a ferroelectric material are compounded, and then the graphene / ferroelectric composite material is mixed with nano sulfur according to a mass ratio of 3:7 to prepare the lithium-sulfur battery composite positive electrode material; and the ferroelectric material is one of barium titanate, lead titanate, potassium niobate, strontium titanate, lithium niobate or lead zirconate titanate. According to the lithium-sulfur battery composite positive electrode material disclosed by the invention, excellent electrical conductivity and structural stability of the graphene oxide are utilized, and the graphene oxide is used as an excellent conductive network and the positive electrode matrix, so that electrical conductivity of the positive electrode material is improved; and by utilizing strong adsorption of ferroelectricity of the ferroelectric material on polar polysulfide, dissolution and shuttling of the polysulfide in electrolyte are inhibited, so that loss of active substances is reduced, coulombic efficiency of a lithium-sulfur battery is improved and a cycle life of the lithium-sulfur battery is prolonged.

The invention relates to a perovskite structure lead titanate single crystal nano-sheet preparation method, which is mainly characterized by comprising: adopting a two-step hydrothermal method, adopting tetrabutyl titanate as a precursor to dissolve in anhydrous ethanol, adding deionized water in a dropwise manner to prepare titanium oxyhydroxide precipitate, washing, mixing with KOH, carrying out a hydrothermal treatment to prepare K2Ti6O13 nano-wire powder, adopting the K2Ti6O13 nano-wire powder as a titanium source, adopting lead nitrate as a lead source, adopting high concentration KOH as a mineralizer, and carrying out a secondary hydrothermal treatment to obtain tetragonal phase perovskite lead titanate single crystal nano-sheet with a thickness of 5-50 nm. The preparation method has characteristics of simple process, easy control, no pollution, low cost, and easy large-scale production achievement.

There is provided an insulation material having a dielectric constant of 10 or more, comprising a filler having a dielectric constant of 50 or more and having two peaks in different particle size ranges in a particle size distribution and an insulating resin combined with each other; an insulation material having a dielectric constant of 10 or more comprising, as essential components, 1) at least one filler selected from the group consisting of barium titanate, strontium titanate, potassium titanate, magnesium titanate, lead titanate, titanium dioxide, barium zirconate, calcium zirconate and lead zirconate, 2) an insulating resin and 3) a dispersant containing a carboxylic group; or an insulation material comprising a filler having a dielectric constant of 50 or more, a dispersant for dispersing the filler and an insulating resin as essential components, wherein an extract of a cured product of the insulation material obtained by extraction with water at 120° C. for 20 hours using a pressure vessel has a pH of 6 or higher.

The invention belongs to piezoelectric devices, and discloses a high-performance magnetic-electric sensing transducer. Along with the progress of science and technology, the demands of people for detection sensitivity are becoming increasingly higher. However, due to the limitation of material properties, the demand for further improving the magnetic-electric coefficient and increasing the detection sensitivity is still a key issue which needs a solution but can not be solved easily. The magnetic-electric sensing transducer comprises a magnetostrictive material (1), a piezoelectric material (2) and a magnetostrictive material (3), the three material layers are bonded through insulating adhesives, the optimal thickness ratio of the three material layers is 1: (0.6-1): 1, and the piezoelectric material is a leadmagnesio niobate-lead titanate single-crystal material. The utility model has the advantage of multi-end output, simple structure, convenient manufacture, no need for any power supply and fast response. The input end has stable frequency response under the low frequency and is applicable to sensors, and the output end has high-voltage output in the resonant state and is suitable for high-performance transducers.