485 results about "Orthorhombic crystal system" patented technology

The invention provides a compound cesium fluoborate, a nonlinear optical crystal with the cesium fluoborate, methods for preparing the compound cesium fluoborate and the nonlinear optical crystal and application of the compound cesium fluoborate and the nonlinear optical crystal. A chemical formula of the compound is CsB<4>O<6>F, the molecular weight of the compound is 291.15, and the compound is of a crystal structure and is prepared by the aid of solid-phase synthesis processes or vacuum packaging processes. A chemical formula of the nonlinear optical crystal is CsB<4>O<6>F, the molecular weight of the nonlinear optical crystal is 291.15, the nonlinear optical crystal belongs to orthorhombic crystal systems, space groups of the nonlinear optical crystal are Pna2<1>, crystal cell parameters of the nonlinear optical crystal include that an a is equal to 7.9241 , a b is equal to 11.3996 , a c is equal to 6.6638 and an alpha, a beta and a gamma are equal to 90 degrees, and the unit cell volumes of the nonlinear optical crystal are 601.95 <3>. Frequency doubling effects of the nonlinear optical crystal is approximately two times frequency doubling effects of KH<2>PO<4> [KDP (potassium dihydrogen phosphate)], and ultrasonic absorption edges of the nonlinear optical crystal are shorter than 190 nm. The nonlinear optical crystal is grown from the CsB<4>O<6>F by the aid of melt processes, high-temperature solution processes, vacuum packaging processes, hydrothermal processes or room-temperature solution processes. The compound cesium fluoborate, the nonlinear optical crystal, the methods and the application have the advantages that the nonlinear optical crystal is free of deliquescence in air, is good in chemical stability and can be applied to all-solid-state laser devices as an ultraviolet nonlinear optical crystal or deep ultraviolet nonlinear optical crystal.

A piezoelectric film element is provided, which is capable of improving piezoelectric properties, having on a substrate at least a lower electrode, a lead-free piezoelectric film, and an upper electrode, wherein at least the lower electrode out of the lower electrode and the upper electrode has a crystal structure of a cubic crystal system, a tetragonal crystal system, an orthorhombic crystal system, a hexagonal crystal system, a monoclinic crystal system, a triclinic crystal system, a trigonal crystal system, or has a composition in which one of these crystals exists or two or more of them coexist, and crystal axes of the crystal structure are preferentially oriented to a specific axis smaller than or equal to two axes of these crystals, and a ratio c / a′ is set in a range of 0.992 or more and 0.999 or less, which is the ratio of a crystal lattice spacing c in a direction of a normal line to the substrate surface, with respect to a crystal lattice spacing a′ whose inclination angle from the substrate surface is in a range of 10° or more and 30° or less.

The invention relates to a method for preparing nano particles of elemental sulfur, belonging to the technical filed of chemistry and chemical industry. In the invention, a micro-emulsion method is utilized to prepare nano-sulfur particles and comprises the following steps: (1) evenly mixing surfactant, cosurfactant and oil phase, adding water solution of sulfur precursor to form micro-emulsion A, wherein the sulfur precursor is a compound capable of performing dismutation under acidic condition to generate the elemental sulfur; (2) evenly the mixing surfactant, the cosurfactant and the oil phase, then adding aqueous acid to form micro-emulsion B; and (3) mixing the micro-emulsion A obtained in step (1) and micro-emulsion B obtained in step (2), after the reaction ends, ageing, breaking emulsion, separating, washing and drying to obtain the nano-sulfur particles. The obtained product is orthorhombic system elemental sulfur, contains no impurity phase, and has evenly particle diameter distribution; and the particle diameter ranges from 10 to 400nm.

The invention relates to a large size lead borate bromine nonlinear optical crystal with high frequency-doubled effect and a preparation method and applications thereof. The molecular formula of the crystal is: Pb2B5O9Br, the crystal belongs to a rhombic system, and the molecular weight is 691.50; mixed solution is obtained by evenly mixing a lead borate bromine compound with a fluxing agent, heating, constant temperature, and cooling to the temperature above a saturation point; seed crystal is put into the mixed solution, the temperature is rapidly reduced to the saturation point, and the seed crystal is led to grow crystal in the solution; after growing to the required size, the crystal is lifted from the liquid surface, the temperature is reduced to room temperature, and the large size lead borate bromine nonlinear optical crystal is obtained. The preparation of the crystal is characterized by simple operation, short growth cycle and low cost. The prepared crystal has larger size, good chemical stability and thermal stability, no deliquescence at room temperature, good mechanical performance, easy processing and storage, and the like. The lead borate bromine nonlinear optical crystal can be widely used in nonlinear optical devices such as frequency-doubled conversion, optical parametric oscillator, and the like.

The invention discloses a nicotine-mandelate complex crystal. A crystal molecular formula of the nicotine-mandelate complex crystal is C26H30N2O6; the nicotine-mandelate complex crystal belongs to anorthorhombic crystal system; a space group is P212121, and unit cell parameters are: a=9.5074(5) angstrom, b=12.7246(9) angstrom, c=20.4101(1) angstrom, and alpha=beta=gamma=90.00 degrees. The invention further discloses a preparation method of the nicotine-mandelate complex crystal, comprising the following steps: a, measuring and fetching nicotine and mandelic acid, dissolving the mandelic acidin a solvent, obtaining a saturated solution, placing the saturated solution of the mandelic acid in a water bath environment, stirring and adding the nicotine dropwise; b, transferring the reaction liquid obtained in step a to a light resistant container, performing ultrasonic treatment, shielding the reaction product from light, placing the reaction product at room temperature, enabling the reaction product to volatilize, and obtaining a nicotine mandelate crystal. The complex crystal has an obviously sustained-release effect in artificially simulated saliva. The invention further disclosestobacco products containing the nicotine-mandelate complex crystal. The tobacco products include gum-based chewing tobacco, a bagged mouth cigarette, an electronic cigarette liquid or a heated non-combustible cigarette.

The invention relates to a high-temperature-phase tellurium barium molybdate crystal as well as a preparation method and the applications thereof. The high-temperature-phase tellurium barium molybdate crystal belongs to an orthorhombic system, a space group is Pca21, a=14.8683 (2), b=5.66360 (10), c=17.6849 (3), ultraviolet-visible-near-infrared light is displayed through a light spectrum, intermediate infrared light is displayed through the light spectrum, the crystal permeates the wavelength range of 380-5530 nm, and infrared laser of 1064 nm is incident into the crystal at a room temperature to generate green light with the wavelength of 532 nm. A fluxing agent method is adopted for growth. The invention also provides the applications of the high-temperature-phase tellurium barium molybdate crystal as a nonlinear optical crystal, a birefringent crystal, a piezoelectric crystal, a ferroelectric crystal, a pyroelectric crystal or a laser substrate material.

The invention relates to a compound lead borate and a nonlinear optical crystal of the lead borate, a preparation method thereof and a purpose thereof. Chemical formulas of the compound lead borate and the nonlinear optical crystal of the lead borate are all Pb4O(BO3)2, wherein the crystal is an orthorhombic system, a space group is Aba2, the cell parameters comprise: a=15.4598(16) Angstrom, b=10.8050(11) Angstrom, c=9.9452(11) Angstrom, V=1661.3(3) Angstrom<3>, a molecular weight is 962.38, a powder frequency multiplication effect of the compound is 3 times that of KDP (KH2PO4), and a translucent band is 280 to 3300 nm. The compound lead borate is prepared by using a solid phase reaction method, and the nonlinear optical crystal of the lead borate is grown by using a melt method or a high-temperature melt method. The nonlinear optical crystal of the lead borate is moderate is mechanical hardness, easy to cut, polish and preserve, and can be widely applied for preparing nonlinear optical devices such as frequency multiplication generators, upper frequency converters, lower frequency converters, optical parametric oscillators, etc.

The invention is a nonlinear optical crystal Se2B2O7, belonging to nonlinear optical material and its synthesis. And its chemical formula: molecular weight of Se2B2O7, 291.54, belonging to orthogonal crystal system, space group, P212121, and unit cell parameters: a= 7.4815(6),b=7.8984(5),c=9.0478(7), alpha=90degree, beta=90degree, gamma=90degree, V=534.65(7)3, and Z=4. And it is prepared by high temperature solid phase process. And it has excellent nonlinear optical performance, and SHG coefficient of its powder is 2.2 times greater than that of KDP and equivalent to that of LBO.

A potassium fluoborate compound, a potassium fluoborate non-linear optical crystal, a preparing method of the crystal and uses of the crystal are provided. The chemical formula of the compound is KB4O6F, the molecular weight of the compound is 197.34, and the compound is prepared by a solid-phase synthetic method or a vacuum encapsulation method. The chemical formula of the crystal is KB4O6F, and the molecular weight of the crystal is 197.34. The crystal belongs to an orthorhombic system, and the space group of the crystal is Pna2<1>. According to cell parameters, a=7.4638 angstroms, b=11.2913 angstroms, c=6.5089 angstroms, alpha=beta=gamma=90 degrees, and the unit-cell volume is 548.54 angstrom<3>. The frequency-doubled effect of the crystal is 1.8 times of that of KH2PO4 (KDP), and the ultraviolet absorption edge is shorter than 190 nm. The crystal grows by adopting a melt method, a high-temperature melt method, a vacuum encapsulation method, a hydrothermal method or a room-temperature solution method. The crystal has good chemical stability, and can be applied as an ultraviolet and deep ultraviolet non-linear optical crystal in all-solid-state lasers.