30results about How to "Orientation controllable" patented technology

The invention discloses a method for inducing growth of an intermetallic compound with the specific grain orientation and the specific number of films through laser forward transfer printing. The method comprises the following steps that firstly, a seed layer is prepared on the surface of a substrate; secondly, a metal film is continuously prepared on the surface of the seed layer; thirdly, the Sn film is prepared on the surface of metal film; fourthly, the substrate and the two films are heated, so that the intermetallic compound film is prepared; fifthly, the intermetallic compound film is transferred to the surfaces of a chip and bonding pads of the substrate respectively; sixthly, the surface of the intermetallic compound film is plated with the Sn film; and seventhly, the bonding pads are in butt joint, pressure is applied, the bonding pads are placed in a reflow furnace, and the stages of preheating, heat preservation, reflowing and cooling are performed. By the adoption of the method, the preparation time of a welding spot of the intermetallic compound capable of being used for high-temperature packaging and interconnection is greatly shortened, the grain orientation and the number of following growing intermetallic compounds are controlled, the welding spot of the intermetallic compound is quickly prepared, and the microstructure is controllable.

The invention provides a method for preparing FTO conductive glass by using near space sublimation technology, and relates to the technical field of FTO conductive glass preparation, comprising: mixing CH3OH, HO(CH2)2NH2 and NH3·H2O according to a first ratio to obtain a first solution; Adding SnCl4·5H2O to the first solution and stirring continuously to obtain a second solution; the SnCl4·5H2O and the HO(CH2)2NH2 have a second ratio; doping the second solution with a fluorine source to prepare An FTO thin film precursor is obtained; the FTO thin film precursor is subjected to near-space sublimation deposition to prepare an FTO conductive glass. The invention has simple process and low cost, can use FTO precursor to control the composition of the FTO film layer, and is prepared in combination with the mature industrialized CSS process, and can obtain the FTO conductive glass with specific structure, morphology and photoelectric performance.

In the method, oxide raw material is prepared according to composition used normally in crystal growth of lead magnesate niobium-lead titanate or lead zincate niobium-lead titanate first. Then the prepared power material is put into agate mortar for ball grinding and to carry on roasting at temperature of 900 degreeC. At last, PZNT (PMNT) thick film is prepared by epitaxial growth on substrate of strontium titanate after the roasted powder material is mixed uniformly with flux of lead oxide and to soak it under high temperature for a period of time.

The invention discloses a method for inducing the growth of a self-assembled monomolecular film of DAST and its derivative monocrystalline film. First, self-assembled on the surface of a substrate containing -SO3-, -OH, -Cl-, -NH2, -F-F One layer of monomolecular film of one or several functional groups in ‑COOH, functionalize the substrate, and then insert the functionalized two substrates side by side into the DAST or DAST derivative solution, and slowly evaporate the solvent In this method, single crystals of DAST or DAST derivatives are grown between two substrates. The invention can effectively overcome the problems of poor controllability of crystal thickness and orientation, easy formation of twins, interference of crystal growth by water vapor and the like during the growth process of organic thin film single crystals, and can effectively control the thickness and growth direction of DAST or DAST derivative crystals, Avoid twinning.

The invention provides a method for preparing a polymer nanowire with a controllable molecular orientation, which comprises the following steps: preparing a nanoporous alumina template; melting and pressing the polymer into a polymer film with a thickness of about 10-200 microns; The polymer film is placed under the nanoporous alumina template, and the two are in close contact. In a vacuum environment, heat to 30-50°C above the melting point of the polymer, and keep it for more than 24 hours, so that it is sucked into the porous oxide film. then cooled to 40-110°C below the melting point of the polymer for more than 10 hours; then cooled to room temperature; removed excess material on the surface of the template; immersed the polymer-containing nanoporous alumina template into hydrogen peroxide In the potassium solution, after the template material is dissolved, the oriented polymer nanowires are obtained. The orientation of the polymer molecular chains obtained by adopting the technical solution of the present invention is controllable, and the molecular orientation of the obtained polymer nanowires is uniform.

The invention discloses a layer-oriented 3D printer nozzle mechanism, comprising an upper machine head and a lower machine head, the upper machine head and the lower machine head are positioned by a positioning boss, and the upper machine head and the lower machine head are arranged radially in sequence inside There are a first internal thread segment, a groove and a second internal thread segment, the second internal thread segment located at the end of the upper head and the lower head is connected to the external thread of the nozzle, and the grooves of the upper head and the lower head are connected A first layered section, a first torsion section, a second layered section, a second torsion section and a converging section are arranged radially in the cavity formed afterward. The molten printing filament flows into the 3D printer nozzle of the stack orientation, and goes through the process of layering-twisting-re-layering-re-twisting-convergence, so that the melt is continuously subjected to strong shearing action to make the material more uniformly mixed, At the same time, the orientation state of the polymer is more obvious, thereby increasing the mechanical properties of the material.

The invention relates to a polymer / inorganic nanometer composite separation membrane and a preparation method thereof. The composite separation membrane consists of a solid matrix of polymer materials and conductive nanomaterials uniformly distributed in the above matrix according to a certain orientation. In the preparation method, conductive nanomaterials which can be arrayed in a certain orientation are uniformly distributed in a film-forming macromolecular material solution. Then electric field is applied during the film-formation process of the mixed solution. The conductive nanomaterials are aligned to the direction of electric field in the film to form the polymer / inorganic nanometer composite separation membrane. The separation membrane has a greater area and smooth surface, controllable film thickness and strength, steerable nanomaterial density and orientation, good selectivity, high transmittance for selected gas and liquid molecules. The method of the invention has the characteristics of simple preparation, easy operation and low cost. The invention can be widely used in the fields of large-scale isolation and purification of gas and large-scale filtration and separation of liquid.

The invention discloses a magnetic nanocomposite material and a preparation method thereof, as well as a dispersion liquid with adjustable optical properties and a preparation method thereof. The magnetic nanocomposite material includes a magnetically coated anisotropic nanostructure, preferably a magnetically coated coated anisotropic nanostructures. The dispersion with tunable optical properties includes a magnetic nanocomposite. Wherein, the preparation method of the dispersion comprises the following steps: preparing a two-dimensional magnetic nanocomposite material; dispersing the two-dimensional magnetic nanocomposite material in a solution to prepare a colloidal dispersion; applying an external magnetic field to the colloidal dispersion to obtain a Composite dispersions. The preparation method of the invention has simple conditions, short preparation period, low cost, and is easy to realize. The prepared dispersion liquid with adjustable optical properties has high magnetic response and adjustable optical properties, and has great application potential in the field of display devices.

The invention discloses a 5-hydro-benzo[b]carbazole and related derivatives and a synthesis method thereof. Step 1) 2-tetralone is activated by alpha carbon by using sodium hydride, wherein sodium hydride and 2-naphthalene The molar ratio of fullone is 0.8~1.2:1, and bromine is dripped into the reaction solution to generate substitution reaction to generate 1-bromo-2 tetralone, wherein the molar ratio of 2-tetralone to bromine is 1:1~ 1:1.5; Step 2) Use the 1-bromo-2 tetralone generated in step 1) to undergo Fisher indole ring closure reaction with phenylhydrazine salt to generate 6-bromo-6,11-dihydro-5-hydrobenzene [b] carbazole and related derivatives, wherein the molar ratio of 1-bromo-2 tetralone to phenylhydrazine salt is 1:1~1:1.3; 6-bromo-formed in step 2) in step 3) 6,11-Dihydro-5-hydrobenzo[b]carbazole and related derivatives are aromatized to 5-hydro-benzo[b]carbazole and related derivatives.

The invention discloses a method for preparing a thin film of a quasi-one-dimensional structural material with controllable orientation. The method is based on a vertical evaporation tube furnace, and specifically includes the following steps: (1) placing the evaporation source material and the substrate to be deposited on the In the vertical evaporation tube furnace; (2) vacuum treatment, so that the vacuum degree of the vertical evaporation tube furnace remains at the preset vacuum degree and the fluctuation does not exceed ± 1Pa; (3) heat treatment in the heating zone, so that The evaporation source material is evaporated and deposited on the substrate to form a thin film; during the preparation process, the orientation of the formed quasi-one-dimensional material film can be controlled by controlling the parameters of the evaporation process. The present invention improves the key process parameters of the preparation method, adopts a vertical evaporation tube furnace with a specific structure for deposition, realizes the deposition and orientation control of a quasi-one-dimensional material film, and obtains a semiconductor film with a controllable orientation independent of the substrate , compared with the prior art, it can effectively solve the problem that the orientation of quasi-one-dimensional materials cannot be controlled.

The invention relates to a preparation method of an orientation controllable TiB whisker reinforcement titanium-based composite material, and belongs to the field of metal-based composite materials. By combining the technologies of ball milling, discharge plasma low-temperature forming and discharge plasma thermal deformation, the optimal morphology of TiB whiskers reaching consistent orientationin the titanium-based composite material is effectively regulated. According to the method, deformation temperature and atmosphere can be controlled, the influence of adverse factors such as oxidationis omitted, deformation rate can be indirectly regulated by pressurization rate, the obtained TiB whiskers are high in length-diameter ratio and good in integrity, the TiB whiskers and titanium substrates have good interface bonding and coherency relationship, the substrates can be enhanced according to orientation factors and length-diameter ratio optimization in a load transfer mechanism, and the integrated mechanical performance of the composite material is remarkably improved. The preparation method sufficiently solves the problems that TiB whisker orientation is not easily regulated, means is single, the length-diameter ratio of the whiskers is low, additional thermal deformation equipment is needed, technology difficulty and cost are accordingly increased and the like.

The invention discloses a method for preparing a nano needle tip with controllable crystal orientation and size, and belongs to the field of nano material preparation. The method includes the steps of: 1) processing the bulk material to be processed into a microrod with a needle point at one end and reaching the micron level; 2) analyzing the crystal orientation of the needle point part of the microrod, and selecting a Grains suitable for processing, and then using gallium ion beams to process the suitable crystal grains into nano needle tips with controllable crystal orientation and size. This method solves the current problem of controllable crystal orientation and size in the process of simulating single nano-particles with the help of nano-tips, and further establishes a more reasonable physical model for the contact between single nano-particles and the surface of materials, which can be widely used in the microscopic process between nanoparticles and the surface of substrate materials in the research.

The invention relates to a preparation method of orientation-controllable Cu-Al-Mn shape memory alloy single crystals, belonging to the field of preparation of metal materials. The preparation methodcomprises the steps of firstly, preparing columnar polycrystalline Cu-Al-Mn shape memory alloy blank with <100> fiber texture along the solidification direction by adopting a directional solidification method; then, adopting a cyclic heat treatment method to enable the alloy crystal grains to continuously grow abnormally until growing into single crystals; meanwhile, controlling the cycle heat treatment system and process parameters to ensure that the crystal grain orientation has no obvious change in a single crystal growth process so as to obtain the Cu-Al-Mn shape memory alloy single crystals having near <001> orientation along the initial solidification direction. The preparation method, provided by the invention, of the single crystals realizes the orientation control of the solid phase transformation method in the single crystal growth process, and has the advantages of capability of preparing the large-sized single crystals (the single crystal sizes can reach 50 mm or more), easy orientation control, simple process, and the like.

The present invention provides a method for preparing functional composite material, which includes the following steps: firstly, placing the powder with functional action in a container cavity, applying field action to said powder, impregnating the powder with liquid material, finally solidifying the liquid material or firstly, placing the liquid material in the container cavity, then adding the powder with functional action into the container cavity in whith the liquid material is held, and applying field action to the power in the container cavity, and finally solidifying the liquid material. Said functional composite material can have the functions of electric conductivity, semi-conduction, superconductance, magnetism, piezoelectricity, damping, sound-absorbing, light sensation and thermal sensation, etc.

The invention discloses a manufacture method of a liquid crystal orientation layer, comprising the following steps: (1) arranging a deposition cabin, arranging targets on the cathode side of the deposition cabin, and arranging a glass substrate on the anode side of the deposition cabin; (2) vacuumizing the deposition cabin; (3) filling inert gas into the deposition cabin; (4) applying direct-current high voltage on the glass substrate and the target, ensuring that the target sputters target atoms under the action of electric field and under certain gas pressure, and depositing on the glass substrate to form an orientation film, wherein the pressure of inert gas is 50-6000Pa; and (5) adopting an ion gun with a certain relative angle and an inclined angle with the glass substrate, carrying out ion bombardment on the orientation film arranged on the surface of the glass substrate, and forming an orientation slot on the orientation film so as to form the liquid crystal orientation layer. The invention can bring more consistent orientation of the liquid crystal orientation layer so as to improve the display quality of the liquid crystal display; in addition, the invention can lower the manufacture cost.

The invention relates to a magnetic control liquid crystal and a preparation method thereof. The preparation method comprises: preparing a one-dimensional magnetic nanometer composite material; dispersing the one-dimensional magnetic nanometer composite material in a solution to prepare a colloidal dispersion liquid; and applying an external magnetic field to the colloidal dispersion liquid to obtain the magnetic field regulated liquid crystal. According to the present invention, the preparation method has characteristics of simple conditions, short preparation period and low cost; the obtained colloidal dispersion liquid has high stability; and the prepared magnetic control liquid crystal has characteristics of high magnetic responsiveness and short relaxation time, and has great application potential in the field of display devices, wherein the light transmittance of the liquid crystal can be controlled at any time by controlling the strength and the direction of the magnetic field so as to control the optical properties of the liquid crystal.