67 results about "Crystal chemistry" patented technology

A continuous flow reactor for the efficient synthesis of nanoparticles with a high degree of crystallinity, uniform particle size, and homogenous stoichiometry throughout the crystal is described. Disclosed embodiments include a flow reactor with an energy source for rapid nucleation of the procurors following by a separate heating source for growing the nucleates. Segmented flow may be provided to facilitate mixing and uniform energy absorption of the precursors, and post production quality testing in communication with a control system allow automatic real-time adjustment of the production parameters. The nucleation energy source can be monomodal, multimodal, or multivariable frequency microwave energy and tuned to allow different precursors to nucleate at substantially the same time thereby resulting in a substantially homogenous nanoparticle. A shell application system may also be provided to allow one or more shell layers to be formed onto each nanoparticle.

The present invention discloses low temperature co-baked MgO-Al2O3-SiO2 glass-ceramic wafer powder and its preparation process. The co-baked MgO-Al2O3-SiO2 glass-ceramic wafer powder is prepared based on the recipe of cordierite 2MgO.2Al2O3.5SiO2 and through adding baking assistant B2O3 and Bi2O3, and modifiers TiO2, CuO, CaO and / or K2O to improve the crystal chemistry performance. It is prepared through a sol-gel synthesis process with roasting temperature of 700-750 deg.c and sintering temperature of 850-900 deg.c. The low temperature co-baked MgO-Al2O3-SiO2 glass-ceramic wafer powder has low sintering temperature, low dielectric constant, low dielectric loss, high insulation resistance, simple preparation process and other advantages. It is applied in making low temperature co-baked wafer.

The invention discloses a molecular cluster material of supramolecular polymer and a preparation method and application of the molecular cluster material. The preparation method includes the steps of firstly, preparing polystyrene microspheres; secondly, using polystyrene microspheres as the substrates, and grafting active groups containing a large amount of carboxyl or sulfonic group to the surfaces of the polystyrene microspheres so as to synthesize the molecular cluster material. The preparation method has the advantages that the method is simple, low in cost, low in energy consumption, environmentally friendly and free of pollution; the prepared molecular cluster material is efficient, stable, large in descaling amount, high in oxidation resistance, high in mechanical strength, easy in large-scale production and applicable to water scale removing of drinking water. The molecular cluster material has the advantages that crystal chemistry and hydromechanics are powerfully combined, and the molecular cluster material mainly uses physical descaling and is stable in descaling performance and capable of achieving automatic regeneration; the molecular cluster material is large in treatment capacity and wide in application range, and the effect of the molecular cluster material is more than 3 times of that of descaling using softened resin; the molecular cluster material is high in discharge water quality, and raw water hardness after treatment can reach an international standard.

The invention belongs to a rotating liquid film reactor in the technical field of preparation of inorganic functional materials and application of the rotating liquid film reactor in terms of preparation of layered double hydroxides. On the basis of the basic technology for preparing the layered double hydroxides by a coprecipitation method, a crystal chemistry principle is adopted, fluid mechanics is calculated and analyzed, so that the rotating liquid film reactor is designed, two types of fluid flows in a limited space in a turbulence manner, uniformity of supersaturation degree is guaranteed, nucleation rate of a system is improved, crystal growth speed is reduced, layered double hydroxides products with small sizes and narrow size distribution are obtained, the sizes of the products can be controlled within a range from 10nm to 150nm, and a size distribution range of the products can be reduced to a range from 20nm to 50nm.

The invention relates to high-performance photoelectric functional calcium borate thulium oxide crystal and growth and application thereof. The formula of the calcium borate thulium oxide crystal is TmCa4O(BO3)3; the crystal in a non-centrosymmetric structure belongs to monoclinic m-point groups and is 101.12 DEG in cell parameter beta, boils at 1460 DEG C, and shows no change at the temperature from the room temperature to the boiling point. A growth method of the crystal includes preparation of polycrystalline material and growth by the Czochralski method; the high-quality calcium borate thulium oxide crystal 20-40mm in diameter and 20-50mm in height can be made. The TmCa4O(BO3)3 crystal is larger than 80% in optical transmittance under the frequency of 808nm-1100nm and 1300nm-156-nm, has an effective piezoelectric constant of deff=1pC / N-5pC / N and effective electromechanical coupling factor of keff=10-30%, and can be used as nonlinear optical crystals, laser crystals or piezoelectric crystals.

The invention relates to a compound lead borate hydrate nonlinear optical crystal and a preparation method and use thereof. The crystal has a chemical molecular formula of Pb6B11O27H9, belongs to a hexagonal crystal system, has the space group of P32, has the molecular weight of 1803.182, and has the unit cell parameters that a is equal to 11.85 angstroms, b is equal to 11.85 angstroms, c is equal to 13.40 angstroms, and Z is equal to 3. The lead borate hydrate nonlinear optical crystal is obtained through hydrothermal reaction by adopting a hydrothermal method. The nonlinear optical effect of the crystal is 1.2 times that of a KDP crystal, the ultraviolet absorption cutoff edge is smaller than 190nm, and the transmission range in ultraviolet and visible regions is wide. A growth process of the crystal has the advantages of simplicity in operation, low cost, low used raw material toxicity, short growth cycle, stable physicochemical properties and the like. The nonlinear optical conversion crystal disclosed by the invention is extensively applied to nonlinear optical devices, such as frequency doubling converters and optical parametric oscillators.

A waterless abrasive-free polishing solution for chemical-mechanical polishing of flexible, crisp and deliquescent crystals is characterized in that the solution comprises 0.5-40% of an organic corrosion agent, 0.5-20% of an organic corrosion inhibitor, 0.5-15% of an organic surfactant, 0.01-10% of an organic pH adjustment agent, and 30-95% of an organic solvent. The waterless abrasive-free polishing solution contains no water, so a problem of easy deliquescent cracking of the flexible, crisp and deliquescent crystals when meeting water is avoided. Simultaneously the waterless abrasive-free polishing solution which contains no abrasives has small damages to surfaces of the flexible, crisp and deliquescent crystals, allows the flexible, crisp and deliquescent crystals can have nondestructive and super-smooth surfaces to be obtained, does not precipitate, and can be preserved and used for a long time. The waterless abrasive-free polishing solution has the advantages of good stability, good fluidity, easy cleaning, and small corrosion to equipment. The waterless abrasive-free polishing solution prepared in the invention is specially used for the chemical-mechanical polishing of the flexible, crisp and deliquescent crystals, has the advantages of no water and no abrasives, and allows flexible, crisp and deliquescent materials to have high surface qualities, and the high surface quality obtaining method is simple, is easy to implement, and costs low.

The invention relates to a sodium lithium borate birefringent crystal, and a preparing method and uses thereof. The chemical formula of the crystal is Li<2>Na<2>B2O5, the molecular weight of the crystal is 161.4, the crystal belongs to an orthorhombic system, and the space group is Cmcm. According to cell parameters, a is 3.313 angstroms, b is 9.985 angstroms, c is 13.400 angstroms, V is 443.3 angstrom<3>, and Z is 4. The transparent range of the crystal is 170-3500 nm. The birefringence of the crystal is between 0.108 (1064 nm) and 0.248 (200 nm). The sodium lithium borate is synthesized by adopting a solid phase reaction process. The Li<2>Na<2>B2O5 birefringent crystal grows by adopting a high-temperature melt process or a cosolvent process. The crystal prepared by the method has characteristics of proper mechanical hardness, easy cutting, polishing and storage, congruent melting, easy growth and a high birefringence, has important applications in the optical and communication fields, and can be used for manufacturing polarizing beam splitter prisms, phase delay devices, electrooptical modulators, and the like.

The invention relates to a compound lithium cesium phosphate non-linear optical crystal, a preparation method and uses thereof. According to the present invention, the crystal has a chemical formula of LiCs2PO4, the space group is Cmc 2[1], the crystal belongs to the orthorhombic system, the crystal cell parameters are that a is 5.813(5), b is 12.016(10), c is 8.035 (7), Z is 4 and V is 561.2(8)angstrom<3>, and the molecular weight is 367.7; the compound lithium cesium phosphate is synthesized by using a solid phase reaction method; the lithium cesium phosphate non-linear optical crystal grows by using a Czochralski method, a Kyropoulos method or a Bridgman-Stockbarge method, and the lithium cesium phosphate non-linear optical crystal obtained through the method of the invention has characteristics of high mechanical hardness, easy cutting, easy polishing processing, and easy storage; and the obtained compound lithium cesium phosphate non-linear optical crystal is widely applied in preparation of optical communication elements, frequency multiplication generators, up-frequency converters, down-frequency converters or optical parametric oscillators, and other non-linear optical devices.

The invention discloses a method for growing a Ce: YAG monocrystal fluorescent material. The chemical formula of the Ce: YAG monocrystal fluorescent material is (Y<1-x-m>AxCem)3(Al<1-y>By)5O12, wherein x is not less than 0 and not greater than 1, y is not less than 0 and not greater than 1, m is not less than 0 and not greater than 0.05, A is one type from Lu, Tb, Pr, La and Gd, and B is one type from Ga, Ti, Mn, Cr and Zr. The furnace temperature range for crystal growth is 1900 to 2000 DEG C, the temperature gradient of a solid liquid interface in the descending direction of a crucible is 10-50 DEG C / cm, the descending speed of the crucible is 0.1-5mm / h, the directions of (111), (100) and (001) can be adopted for seed crystals, the diameter of the crucible is 30-120 mm, and the height of the crucible is 50-200mm. Through adoption of the Bridgman-Stockbarger method, the method for growing the Ce: YAG monocrystal fluorescent material has the advantages of simplicity in operation, low cost, large size of grown Ce: YAG crystals, less internal defects, high doping concentration and the like.

The invention relates to a guanidine tetrafluoroborate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the crystal is [C (NH2) 3] BF4, the molecular weight is 146.89, the crystal belongs to a trigonal system, the space group is R3m, and the cell parameters are as follows: a = 7.4634 (10) angstroms, b = 7.4634 (10) angstroms, c = 9.1216 (19) (6) angstroms and Z = 3. The ultraviolet cut-off edge is 200 nm, the frequency doubling response is 4-5 times that of a commercial nonlinear optical crystal KDP, and the crystal with the centimeter-level size is grown by adopting a hydrothermal method, a room-temperature solution method, an evaporation method or a solvothermal method; the invention relates to the application of the crystal for preparing harmonic light output with frequency doubled or frequency tripled or frequency quadrupled or frequency quintupled or frequency sextupled of 1064 nm fundamental frequency light outputted by an Nd: YAG laser, or generating ultraviolet and deep ultraviolet frequency doubled light output lower than 200 nm, or for preparing a frequency doubled generator, an upper or lower frequency converter or an optical parametric oscillator. The crystal has the advantages of wide light-transmitting wave band, stable physical and chemical properties, high mechanical hardness, difficulty in fragmentation and deliquescence, easiness in cutting, polishing, processing and storage and the like, and has important application in the fields of optics, laser lithography and communication.

The invention relates to a cesium-lead-carbon-oxygen-iodine birefringent crystal for infrared-ultraviolet bands, as well as a preparation method and use. The chemical formula of the crystal is Cs3Pb2 (CO3)3I, the molecular weight of the crystal is 1120.04, the crystal belongs to a monoclinic system, a space group is C<2> / m, and unit cell parameters are a=24.549(3) Angstrom, b=5.4233(8) Angstrom, c=12.8598(16) Angstrom, beta=114.533(8) degrees,V=1557.5(4) Angstrom<3>, and Z=4. The cesium-lead-carbon-oxygen-iodine birefringent crystal is a positive biaxial crystal, (nz-ny) is greater than (ny-nx), a transmission range is 300-3000nm, birefringence is between 0.084(3000nm) and 0.374(340nm), and the crystal grows by a hydrothermal method. The obtained crystal disclosed by the invention is easy to grow, cut, grind, polish and preserve, stable in the air, and not liable to deliquate, can be used for manufacturing polarization beam splitters of Glen prisms, Wollaston prisms, Rochon prisms, or beam splitting polarizers and the like, and has an important application in the fields of photics and communications.

The invention relates to a compound calcium monohydroxypentaborate monohydrate nonlinear optical crystal and its preparation method and use. The crystal has a chemical formula of Ca2B5O9OH.H2O, has molecular weight of 313.23, belongs to a monoclinic system, has a space group Cc and cell parameters of a=10.780(3)A, b=6.5110(19)A, c=12.339(4)A, beta=115.057(19) degree and V=784.6(4)A3. Through a hydrothermal method, the compound calcium monohydroxypentaborate monohydrate nonlinear optical crystal is obtained by program cooling or natural cooling. The crystal has powder frequency-doubling effect which is 2 times KDP(KH2PO4), has a UV cutoff wavelength of 190nm or less and can be used as a deep UV nonlinear optical crystal. The nonlinear optical crystal has the advantages of simple operation, low cost, low raw material toxicity, short production period and stable physicochemical properties. The nonlinear optical crystal can be widely used in nonlinear optical devices such as a frequency doubling generator, an upper frequency converter, a lower frequency converter or an optical parametric oscillator.

The invention relates to an yttrium phosphate double-refraction crystal and a growing method and application thereof. The crystal has the chemical formula of YPO4, belongs to a tetragonal system, and has the space group of I4[1] / amd, the cell parameter a of 6.8947 angstroms, the cell parameter c of 6.0276 angstroms, the cell parameter V of 286.533 angstroms<3> and the cell parameter Z of 4. The crystal is used for infrared-deep ultraviolet wave bands, is a single-axis crystal, and has the transmission range of 150-3300 nm; the double-refraction difference delta n of n[e] and n[o] ranges from 0.18 to 0.22, and the large-size yttrium phosphate crystal grows through a high-temperature melt method (melt pulling method or melt top seed solution method) or a flux growth method. The yttrium phosphate crystal obtained through the method is large in size, short in growth cycle, wide in light transmission range, high in transmission rate, large in double-refraction coefficient, and easy to cut, polish, machine and store. The crystal is a wide-waveband double-refraction optical material and can be used for manufacturing an optical fiber isolator, an annular mirror, a beam displacer, a beam splitter, a Glan polarizer and other polarizing devices and has important application in the fields of optics and communication.

The invention discloses a molecular cluster material of supramolecular polymer and a preparation method and application of the molecular cluster material. The preparation method includes the steps of firstly, preparing polystyrene microspheres; secondly, using polystyrene microspheres as the substrates, and grafting active groups containing a large amount of carboxyl or sulfonic group to the surfaces of the polystyrene microspheres so as to synthesize the molecular cluster material. The preparation method has the advantages that the method is simple, low in cost, low in energy consumption, environmentally friendly and free of pollution; the prepared molecular cluster material is efficient, stable, large in descaling amount, high in oxidation resistance, high in mechanical strength, easy in large-scale production and applicable to water scale removing of drinking water. The molecular cluster material has the advantages that crystal chemistry and hydromechanics are powerfully combined, and the molecular cluster material mainly uses physical descaling and is stable in descaling performance and capable of achieving automatic regeneration; the molecular cluster material is large in treatment capacity and wide in application range, and the effect of the molecular cluster material is more than 3 times of that of descaling using softened resin; the molecular cluster material is high in discharge water quality, and raw water hardness after treatment can reach an international standard.

The invention relates to a preparation method and application of a barium-cesium borate nonlinear optical crystal. The chemical formula of the crystal is CsBaB9O15, the molecular weight is 607.54, thecrystal belongs to a monoclinic system, the space group is Cc3; cell parameters are that a=6.4918(4) angstroms, b=11.4075(6) angstroms, c=17.2571(9) angstroms, beta=92.375(3), Z is equal to 4, and Vis equal to 1276.88 (12) angstrom<-3>. A Bridgman-Stockbarger method is adopted to grow the large-size cesium barium borate crystal, a powder frequency multiplication test method is adopted to measurethe phase matching ability of the CsBaB9O15 crystal, the powder frequency multiplication effect is 3KDP, and the ultraviolet absorption edge is close to 175 nm; the CsBaB9O15 crystal is a harmonic generator capable of realizing the quadruplicated frequency and the quintuplicated frequency of Nd:YAG(1064nm). In addition, the CsBaB9O15 crystal is colorless and transparent, does not deliquesce in the air, is stable in chemical performance, can be widely applied to various nonlinear optical fields, and can develop nonlinear optical application of an ultraviolet band.

The invention relates to a stress control method of a lithium niobate (LiNbO3) crystal surface after chemically mechanical polishing (CMP). In the stress control method of the LiNbO3 crystal after the chemically mechanical polishing, when washing is carried out after CMP is just finished, a manner of gradually and slowly increasing the flow of a water polishing cleaning solution is used to fully release heat stress of the surface of the LiNbO3 crystal so as to reach consistent inner and outer heat stresses of the LiNbO3 crystal, thereby effectively avoiding the problems that cracking and broken crystal easily occurs in the process of cleaning the LiNbO3 crystal, perfectly achieving the stress control of the LiNbO3 crystal after CMP and greatly improving the processing yield of the LiNbO3 crystal owing to the cracking and the broken crystal.

The invention relates to a compound barium yttrium borate, a barium yttrium borate nonlinear optical crystal and a preparation method and application thereof, wherein the chemical formulas of the compound and the crystal are BaYBO4, the crystal belongs to a hexagonal system, the space group cell parameter Z is 3, the molecular weight is 301.06, and the frequency-doubled effect of the crystal is about 3 times that of KDP (KH2PO4). The compound yttrium barium borate is synthesized by adopting a solid-phase reaction method, the yttrium barium borate nonlinear optical crystal grows by adopting a high-temperature melting method or a pulling method, the crystal preparation method is simple and low in cost, and the prepared crystal is high in mechanical hardness and easy to cut, polish, process and store. The barium yttrium borate crystal obtained by the method is applied as a nonlinear optical frequency doubling device.

The invention discloses a multi-stage continuous refiner set and application of the multi-stage continuous refiner set in clean preparation of a layer-like composite metal hydroxide, belonging to the technical field of preparation of inorganic functional materials. According to the invention, a metal hydroxide solution is roughly ground by a sand mill at first and then accurately ground by a secondary colloid mill, and at last the layer-like composite metal hydroxide is prepared after heating, crystallization and drying in a reaction kettle. Based on the basic technique of clean preparation of the layer-like composite metal hydroxide, the crystal chemistry theory is utilized to calculate and analyze hydromechanics to design the multi-stage continuous refiner set; by grinding and preprocessing the raw materials, the grain size of the raw materials can be reduced; the reaction rate can be increased, and in particular appearances of unevenness of the system in the reaction kettle and imbalance of the reaction rate can be effectively avoided when a large-size reaction kettle is adopted for production, so that the grain size of the products is remarkably reduced, the reaction time is greatly shortened from 1-10 days to 0.1-1 day, and the grain size d90 of the products is reduced from less than 10 micrometers to less than 2 micrometers.

A scintillator plate is provided. The scintillator plate comprises a substrate, a scintillator including a plurality of columnar crystals arranged above the substrate, a first protective film, and a second protective film. The first protective film chemically bonds to the plurality of columnar crystals in interfaces with the plurality of columnar crystals, and the substrate and the second protective film seal the scintillator and the first protective film.

The invention relates to the technical field of preparation of luminescent materials, in particular to an acridinyl complex crystal, a doped crystal luminescent material and a preparation method and application of the acridinyl complex crystal and the doped crystal luminescent material. The chemical formula of the acridinyl complex crystal provided by the invention is as shown in a formula I: [CdCl2 (AD)], and in the formula I, AD is an acridine molecule. According to the acridinyl complex crystal provided by the invention, an inorganic component cadmium chloride is introduced to coordinate with acridine, and acridine molecules are fixed in a rigid framework of the complex crystal, so that the acridinyl complex crystal with long luminous life and high luminous efficiency is obtained. Results of the embodiment show that the acridinyl complex crystal provided by the invention has bright yellow fluorescence emission under excitation of a 365nm steady-state light source, the fluorescence lifetime is 20.69 ns, and the light-emitting quantum yield is 62%.

The invention provides a rubidium aluminum fluoborate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the crystal is RbAlB3O6F, the crystal structure belongs to an orthorhombic system, the space group is Pna21, and the cell parameters are as follows: a=22.403(4) angstroms, b=12.311(2) angstroms, c=7.2051(13) angstroms, alpha=beta=gamma=90 degrees, and unit cell volume is 1987.1(6) angstrom<3>. The rubidium aluminum fluoborate nonlinear optical crystal disclosed by the invention has excellent optical performance, relatively strong nonlinear optical effect, short ultraviolet cutoff edge and deep ultraviolet phase matching wavelength lower than 200nm, has no layered growth habit, does not use highly toxic raw materials, and is easy for large-size crystal growth and realization of industrialization. The rubidium aluminum fluoborate crystal disclosed by the invention can meet the use requirements of nonlinear optical crystals in a deep ultraviolet region.

The invention relates to a fluorine lead metavanadate birefringent crystal as well as a preparation method and application thereof. The crystal has a chemical formula of Pb2VO2F5, belongs to a triclinic crystal system, and has a space group of rho-1; cell parameters of the crystal are shown as follows: a is equal to 5.6827(6) ANG, b is equal to 7.3729(8) ANG, c is equal to 8.3478(10) ANG, V is equal to 289.77(6) ANG<3>, and Z is equal to 2; the crystal is applicable to infrared-visible wavebands, and the transmission scope is 450-1300 nm; the birefringence ranges between 0.327 and 0.579, and the crystal is grown by adopting a hydrothermal method; and the crystal is regarded as a positive biaxial crystal because the following formula is met: the difference between nz and ny is greater than that between ny and nx. The crystal obtained according to the preparation method provided by the invention is easy to grow, polish, cut and store, chemically stable, and not easy to dissolve in water; meanwhile, the crystal has the advantages that the preparation period is short, the operation is simple, the cost is low, and the size is relatively large; and accordingly, the crystal can be applied to manufacturing of a Glan prism, a Wollaston prism, a Rochon prism or a beam splitting polarizer, and other polarization beam splitting prisms, and has important application value in the fields of optics and communication.

The invention discloses a Pb<2+> ion-doped high temperature phase barium metaborate crystal and a growing method and use thereof. The chemical formula of the crystal is PbxBa(1-x)B2O4, wherein x is the proportion that Pb<2+> ions replace Ba<2+> ions, and the value range is that x is greater than or equal to 0.005 but less than or equal to 0.05. The crystal can be grown by melt processes such as a pulling method, a kyropoulos method and a Bridgman method. The growing raw material of the crystal is PbxBa(1-x)B2O4 or PbxBa(1-x)B2O4 with excessive B2O3 not exceeding 10mol%. The crystal is stable in physical and chemical properties, good in machinability, wide in transparency range, great in photo damage threshold value and great in birefringence and the frequency in a stimulated Raman scattering (SRS) active vibration mode is about 635cm<->. The crystal can be used for preparing beam splitting polarizing components such as a Glan prism, a Wollaston prism, a Semarmont prism, a Rochon prism and the like as well as phase delay and optical compensating apparatuses; and the crystal can be used as an SRS crystal for converting frequency of laser in ultraviolet-visible-near-infrared bands.

The invention discloses a photoinduced shrinkage metal-organic framework compound. The compound is a colorless rod-like crystal with a chemical formula of [Zn<2>(bdc)<2>(3-CH<3>-spy)].H<2>O, wherein bdc is 1,4-terephthalate, and 3-CH<3>-spy is 3-methylstyryl-4-pyridine. The crystallographic parameters of the metal-organic framework compound are that (1) a crystal system is a monoclinic system; (2)a space group is P2<1> / c; (3) a is equal to 18.3715(15) angstroms, b is equal to 10.9360(10) angstroms, c is equal to 21.3401(16) angstroms, beta is equal to 112.578(2) DEGs, and V is equal to 3958.6(6) angstroms <3>; (4) D<c> is equal to 1.425 / g.cm<-3>, Z is equal to 4, and mu is equal to 1.268(Mo-Kalpha) / mm<-1>; (5) the total number of diffraction points is 60722, and the number of independentdiffraction points is 9099; and (6) F(000) is equal to 1744, R<1> is equal to 0.0691, wR<2> is equal to 0.1908, and GOF<c> is equal to 0.972. The invention also discloses a preparation methodfor the metal organic framework compound.

The invention relates to a barium-zinc-tin-sulfur-oxygen compound, a barium-zinc-tin-sulfur-oxygen nonlinear optical crystal, a preparation method and application. The chemical formula of the barium-zinc-tin-sulfur-oxygen compound and the chemical formula of the barium-zinc-tin-sulfur-oxygen crystal are Ba2ZnSn2S6O and belong to a tetragonal system,the space groups are all P-421m, the unit cell parameter Z is equal to 2, and the unit cell volume molecular weight is 785.79. The Ba2ZnSn2S6O nonlinear optical crystal is synthesized by adopting high-temperature spontaneous crystallization under a vacuum condition; the frequency-doubled effect of the Ba2ZnSn2S6O powder is 0.6 times that of sulfur gallium silver (AgGaS2) with the same granularity under the irradiation of laser with the wavelength of 2090nm; and the Ba2ZnSn2S6O nonlinear optical crystal has a relatively wide light transmission wave band and a moderate frequency doubling effect, and is used for manufacturing a nonlinear optical device.

The invention relates to a preparation method and application of a lithium borate birefringent crystal. According to the crystal, the chemical formula is Li3BO3; the molecular weight is 79.63; the crystal belongs to a monoclinic system; the space group is P21 / c; the cell parameters are that a is equal to 3.2637 (8) angstroms; b is equal to 9.180 (2) angstroms; c is equal to 8.319 (2); beta is equal to 101.039 (2) degrees; V is equal to 244.63 (11) angstroms 3; and Z is equal to 4. The crystal is used for infrared-deep ultraviolet bands, is an aniaxial negative crystal, and has a transmission region of 175 to 3,500nm; double refraction ranges from 0.080 (4,500nm) to 0.140 (175nm); and a high-temperature solution method is adopted to grow the crystal. The crystal obtained by the method described in the invention is easy to grow, cut, grind, polish and preserve, stable in air and difficult to airslake, can be used for manufacturing polarized beam splitter prisms such as Glan prisms, Wollaston prisms, Rochon prisms or beam splitting polarizers, and thus has important uses in the fields of optics and communication.