485 results about "Orthorhombic crystal system" patented technology

The invention relates to a sulfurized gallium and barium monocrystal as well as a growing method and an infrared nonlinear optical device thereof. A molecular formula of the sulfurized gallium and barium monocrystal is BaGa4S7, the sulfurized gallium and barium monocrystal belongs to the field of rhombic systems, a space group is Pmn21, and a cell parameter is as follows: a=14.755 A, b=6.228 A, c=5.929 A, and alpha=beta=gamma=90 DEG. The nonlinear optical materials are prepared by adopting a crucible decent method to obtain compositions and monocrystals of the same and can be used for manufacturing a secondary harmonic generator, an upper frequency converter, a lower frequency converter and an optical parametric oscillator.

The invention discloses a mixed crystal form ferric fluoride cathode material and a preparation method thereof. The chemical formula of the mixed crystal form ferric fluoride cathode material is (FeF3)x(FeF3.0.33H2O)y / C. The cathode material has the beneficial effects as follows: the product particle size can be optimized through controlling the reaction temperature and time, the obtained product purity is high, and a ferric fluoride preparation method is novel, simple and high in yield. The prepared ferric fluoride is in a mixed crystal form of a cubic system and an orthorhombic system, the ferric fluoride of the orthorhombic system is contributed to maintaining the stability of an FeF3 structure in processes of insertion / deinsertion of lithium ion, so that the cycling performance of the material is improved, and the ferric fluoride of the cubic system is contributed to improving the mass specific capability and thermal stability of the material. The (FeF3)x(FeF3.0.33H2O)y / C material prepared by the method has the advantages of small particle size, uniform distribution, good repeatability and excellent electrochemical performance.

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.

The invention relates to a non-linear optical crystal-sodium beryllate borate, a growth method and application thereof. A chemical formula of the sodium beryllate borate is NaBeB3O6, the sodium beryllate borate belongs to an orthorhombic system, a space group is Pna21, cell parameters are that a is equal to 9.1531*, b is equal to 11.9337*, c is equal to 4.3724*, alpha is equal to beta, gamma and 90 DEG, and z is equal to 4, and the unit-cell volume is that V is equal to 477.60*<3>. The frequency multiplication coefficient of the sodium beryllate borate is 1.22 times of that of LiB3O5(LBO). The ultraviolet absorption edge of the sodium beryllate borate is shorter than 190nm. A solid-phase synthesis method is adopted for sintering at high temperature to obtain a NBB compound. A monocrystal can be successfully grown by using a molten salt method and taking Na2O-B2O3 or NaF-B2O3 as a fluxing agent. The NaBeB3O6 has non-linear optical effect, cannot be dissolved into dilute acid, has good chemical stability, can be widely applied in various non-linear optical fields, and can develop the non-linear optical application of deep ultraviolet wavebands.

The invention relates to a large-sized bismuth barium borate non-linear optic crystal, which belongs to the orthorhombic system with a space group equal to Pna21 and a molecular formula equal to BaBiBo4. The crystal is made from a mixed system of bismuth barium borate, fluxing agent Bi2O3 and BaB2O4, or BaO and Bi2O3; the nonlinear optical effect of the crystal is approximately five times of that of (KH2PO4) KDP; and the crystal is transparent within a wave band of between 200 and 3,000 nm, and has the large size with 1 to 100mmx1 to 100mmx1 to 100mm. The large-sized bismuth barium borate non-linear optic crystal has the advantages of quick making speed, simple operation, low cost, large-sized and transparent crystal made by the non-linear optic crystal, wide light-transmission wave band, ideal mechanical property, infrequent fragmentation, stable physicochemical properties, no deliquescence and easy processing and preservation; moreover, the non-linear optic crystal can be used to make non-linear optical devices such as a multiple frequency generator, an upper frequency converter or a lower frequency converter and an optical parametric oscillator.

The invention relates to a large size potassium strontium borate nonlinear optical crystal, the preparation and use thereof. The formula of the crystal is: KSr4B3O9, which belongs to rhombic system, the space group is Pna2(1), and the molecular weight is 566.01, and the crystal size is 10-60mmx10-60mmx10-60mm. The preparation contains the following steps of: evenly mixing the potassium strontium borate compound with a fusing assistant, heating, maintaining the constant temperature, cooling to the saturation temperature and obtaining a mixture solution, placing a seed crystal into the mixture solution, lowering the temperature to the saturation temperature to obtain the required crystal, and subsequently extracting the crystal from the liquid level, cooling to room temperature, and finally obtaining the large size potassium strontium borate nonlinear optical crystal. The nonlinear optical effect of the crystal is approximately the same as the KDP, the transparent optical band is 220nm-3000nm. The crystal is simple in operation, low in cost, large in crystal size, short in growth period, less in coating, high in laster damage threshold, good in mechanical property, firm, stable in physicochemical properties, uneasy to deliquescence, convenient for processing and storage, or the like. Accordingly, the nonlinear optical crystal of the invention can be abroadly applied in nonlinear optical devices such as frequency doubler, optical parametric oscillator or the like.

The present invention provides one kind of nanometer MoO3 stick and its preparation process. The laminated nanometer MoO3 stick in orthorhombic system has length 1-10 microns, 3-9 laminated MoO3 layers, thickness 50-200 nm and width 60-120 nm. The preparation process includes dissolving molybdenum oxide or molybdate in hydrogen peroxide solution via intense stirring for 30-50 hr to form sol, transferring the sol into stainless steel reaction tank with PTFE lining, hydrothermal treatment at 150-180 deg.c for 4-6 days, naturally cooling to room temperature to obtain hydrothermal product, anhydrous ethyl alcohol washing and water washing, and drying. The preparation process is simple, high in reproducibility, controllable, and environment friendly. The prepared nanometer MoO3 stick has high surface activity and may be filmed via brushing or spraying and prepared into electrochemical and optical devices directly or after being mixed with other superfine powder.

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 method for preparing orthorhombic black phosphors monocrystals. The method comprises the following steps: mixing a phosphorus raw material, elemental Sn and a mineralizer SnI4, placing the obtained mixture in a quartz tube, carrying out vacuum pumping and high temperature sealing, placing the sealed quartz tube in a muffle furnace, and carrying out optimized temperature programming and cooling to prepare black phosphorus. Black phosphorscrystals obtained in the invention have the advantages of large size, good crystallization performance and high purity, and the preparation method has the advantages of low device requirements, easy realization, and provision of great convenience for subsequent black phosphorus application and development.

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 relates to an inorganic nonlinear optical material lead iodo-borate crystal, and a preparation method and application thereof, belonging to the field of inorganic chemistry as well as the field of material science. The chemical formula of the lead iodo-borate crystal is Pb2B5O9I, and the molecular weight is 739.35; the lead iodo-borate crystal belongs to an orthorhombic crystal system and a space group Pnn2; and the unit cell parameters are as followings: alpha = 90 DEG, beta = 90 DEG, gamma = 90 DEG, and Z = 4. The lead iodo-borate crystal is synthesized by a one-step self fluxing method, which comprises the following steps: mixing lead raw materials consisting of oxide, lead iodide and boron oxide with self flux consisting of PbO and B2O3 which are 50-150% excess, wherein the molar ratio of of PbO:PbI:B2O3 is 3:1:5; adding the mixture to a vacuum sealed container; insulating heat at 700-900 DEG C for 5-48 hours; and slowly cooling to room temperature at the speed of lower than 10 DEG C / hour to obtain an end product lead iodo-borate crystal. The lead iodo-borate crystal has excellent nonlinear optical performance, and the second harmonic generation (SHG) coefficient of the crystal powder is 1.4 times that of KTP (kalium titanium phosphate).

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 provides a compound rubidium borofluoride and a rubidium borofluoride non-linear optical crystal and a preparation method and use of the rubidium borofluoride non-linear optical crystal. The compound rubidium borofluoride has a chemical formula of RbB4O6F, has molecular weight of 243.71 and is prepared through a solid phase synthesis method or a vacuum packaging method. The crystal has a chemical formula of RbB4O6F, has molecular weight of 243.71, belongs to the orthorhombic system, and has a space group of Pna 21 and cell parameters such as a=7.6742A, b=11.228A, c=6.6218A, alpha=beta=gamma=90 degrees, unit-cell volume of 570.57 A<3>, crystal frequency-doubled effect about 1.9 times that of KH2PO4 (KDP) and ultraviolet absorption edge shorter than 190nm. The crystal is formed through 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 used as an ultraviolet and deep-ultraviolet non-linear optical crystal in an all-solid-state laser.

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 discloses novel infrared non-linear optical crystals barium bismuth indium sulfide and relates to the field of photoelectric materials. The chemical formula of the barium bismuth indium sulfide is Ba2BiInS5; the molecular weight is 758.78; the crystals belong to an orthorhombic system; the space group is Cmc21; and unit-cell parameters are that: a=4.2448(4)Angstrom, b=18.2304(13)Angstrom, c=12.68189(10)Angstrom, alpha= 90.00 degrees, beta= 90.00 degrees, gamma= 90.00 degrees, V=981.37(14)Angstrom<3>, and Z is 14. The crystals are prepared by a closed vacuum quartz crucible by a high-temperature reaction method. The barium bismuth indium sulfide crystals have excellent infrared non-linear optical performance; through the experiment, the powder secondary harmonic generation of the barium bismuth indium sulfide crystals is about 1 time that of potassium titanium oxide phosphate (KTP).

The invention discloses nano ferric hydroxide and a preparation method thereof. The shape of nano ferric hydroxide is a nano-sheet cluster, wherein the cluster diameter of the nano-sheet cluster is between 400 and 500nm, and the sheet length of nano-sheets forming the nano-sheet cluster is between 200 and 250nm, and the sheet width is between 20 and 25nm, and the sheet thickness is between 2 and 5nm; the nano-sheet cluster is formed by orthorhombic system alpha-ferric hydroxide, and the specific surface area of the nitrogen adsorption and desorption representation is between 100 and 105m<2> / g. The method comprises the following steps of: mixing ethylene glycol and deionized water, and performing ultrasonic to prepare ethylene glycol aqueous solution; respectively adding ferrous sulfate into the ethylene glycol aqueous solution, and performing ultrasonic to obtain ferrous sulfate mixed solution; adding urea into ethylene glycol aqueous solution, and performing ultrasonic to obtain urea mixed solution; injecting the urea mixed solution into the stirring ferrous sulfate mixed solution at a speed of 0.8-1.2ml / min according to a volume ratio of (0.8-1.2):3 to prepare a reaction solution; and injecting air into the reaction solution at a speed of 2.5- 3.5ml / min to prepare the target product. The nano ferric hydroxide can be widely applied to adsorption and photocatalytic decomposition of organic matters.

The invention discloses a Wells-Dawson niobium-tungsten mixed polyacid rare earth derivative. The chemical formula of the derivative is K8 [H14{Nb12P4W24O122}2{Y(H2O)4.5}4{Nb4O4(OH)6}].18H2O, a crystal of the derivative belongs to an orthorhombic system, a space group is Fddd, and cell parameters are as follows: a = 24.075(4) angstrom, b = 43.886(8) angstrom, and c = 70.192(11) angstrom. The derivative is prepared from potassium hexaniobate, hexavacant Wells-Dawson phosphowolframate and rare earth ions through reacting under conventional aqueous solution conditions. The derivative is high in stability, and has a photocatalytic hydrogen production performance; and in addition, the preparation process is simple, easy to operate, low in cost and high in yield, therefore, the derivative has a potential application prospect.

The present invention discloses a red phosphor, wherein an expression general formula is Sr4Al14O25:Mn<4+>, a crystal structure of the red phosphor belongs to a orthorhombic crystal system, and the activation ion is Mn<4+>. The present invention further discloses a preparation method for the red phosphor. The method comprises: weighing raw materials according to an element mole ratio of Sr to Al to Mn to B of 4:14(1-x):14x:14y, wherein x is more than or equal to 0.01% and less than or equal to 5%, and y is more than or equal to 0.5% and less than or equal to 40%; grinding and uniformly mixing, and then carrying out pre-burning for 5-10 hours at a temperature of 500-1000 DEG C under an oxidizing atmosphere; taking out the material, grinding and uniformly mixing, and then carrying out burning for 2-12 hours at a temperature of 1050-1600 DEG C under an oxidizing atmosphere; and taking out the material, grinding and uniformly mixing, and then carrying out burning for 2-12 hours at a temperature of 1050-1600 DEG C under an oxidizing atmosphere. The red phosphor of the present invention has characteristics of broad ultraviolet and blue light absorption, long fluorescence lifetime, low cost, and environment protection, wherein the red phosphor has red fluorescence covering the range of 600-750 nm under ultraviolet or blue light excitation.

The invention relates to a K3Al2(PO4)3 non-linear optical crystal as well as a preparation method and application thereof. The crystal belongs to a rhombic system and has a space group of Pna21, and the cell parameters of the crystal are described in specifications of the invention. The preparation method of the crystal adopts a flux growth method to grow the crystal and mainly comprises the steps of: preparing materials of K3Al2(PO4)3:K2O:P2O5 by the molar ratio being 1: (0.5-1.5): (0.5-1.5); putting in a muffle furnace for heating and melting; and then putting in a single crystal growth furnace for growing the crystal by using a seed crystal method. The K3Al2(PO4)3 crystal has the advantages of large non-linear optical effect, wide light transmission range of 180-2500nm, good mechanical property, no deliquescence and easy processing and preservation and the like, can be used for preparing non-linear optical devices and meet the demands of frequency conversion of laser in a blue-green light band and an ultraviolet light band.

The invention discloses a preparation method of a cuboid-shaped positive-pole FeF3(H2O)0.33 material. The preparation method has the following technical effects that the preparation method is simple in process, low in energy consumption and low in cost, is environment-friendly and is easy for industrial production; the prepared FeF3(H2O)0.33 material is of an orthorhombic structure, particles are of monodispersed cuboid shapes, and the cuboid particles have coarse surfaces and are large in specific surface area, so that the insertion and deinsertion of Li<+> are facilitated; and the prepared FeF3(H2O)0.33 material has high tap density and energy density and can achieve excellent electrochemical properties, particularly high power multiplying performance, without being compounded with a conductive agent (carbon materials, such as acetylene black), thereby being particularly applicable to power supply application occasions of high stability and high energy density.

In the method, under protection of nitrogen gas, manganese salt and strong alkali are dissolved in boiled deionisation respectively to prepare forebody material of manganous hydroxide in laminate structure. According to certain proportion, adding intercalation object of lithium compound to suspending liquid of laminate forebody and carrying out intercalation prepares laminate lithium manganate under synergetic effect of oxidant. Chemical constitution formula of lithium manganate is LixMnO2 (0.8 is less than or equal to x is less than or equal to 1.0). Characters of produced lithium manganate are orthorhombic crystal system, Pmnm spatial symmetry, high purity, no impurity phases, and controllable even grain size. Laminate lithium manganate as material of positive pole provides high specific capacity and good cycle performance. Features of the invention are simple technique, cheap material and easy to realize commercial manufacture.

The invention relates to a ternary rare-earth organic framework crystal material. A chemical formula of the ternary rare-earth organic framework crystal material is [Me2NH2][EuxTbyGd1-x-yL(H2O)4], wherein x is more than 0 and less than or equal to 0.05 and y is more than 0 and less than or equal to 0.1; Me represents methyl, L represents an organic ligand formed by pyridine-2,6-isophthalic acid; a crystal belongs to an orthorhombic crystal system and a space group is Pnma; the crystal belongs to the orthorhombic crystal system and the pace group is Pnma; the lattice parameters are as follows: a=8.500 to 8.506 angstroms, b=17.28 to 17.35 angstroms, c=12.05 to 12.15 angstroms, alpha=90, beta=90, gamma=90 and Z=4. The ternary rare-earth organic framework crystal material provided by the invention has very high heat stability and air stability; under the stimulation of ultraviolet light, characteristic emission of europium ions and terbium ions can be emitted simultaneously; the ternary rare-earth organic framework crystal material has very good linear response on temperature at the ratio of 77K to 450K, so that the ternary rare-earth organic framework crystal material can be used for temperature detection in a wide range.

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.

The invention relates to a hydrogen isotope storage and supply technology, and discloses a hydrogen isotope storage alloy with high cycling stability and a preparation method thereof. The chemical general formula of the hydrogen isotope storage alloy is ZrCo1-xCux, wherein x is greater than or equal to 0.1 and less than or equal to 0.3. The invention further discloses a preparation method of a hydrogen isotope storage alloy ingot and a thin strip. The hydrogen isotope storage alloy has the advantages that a hydrogen storage alloy has relatively high cycling stability capacity and relatively good cycling stability dynamics, the cycle life of the hydrogen storage alloy is prolonged, the hydrogen storage platform characteristics and thermodynamic characteristics are changed, and a new hydridephase ZrCoHx (x is about 0.6) with a positive cross crystal system CrB-type crystal structure is generated; in addition, the preparation method of the hydrogen isotope storage alloy is simple in process and low in cost, and is especially suitable for storing and material supplying of an ITER hydrogen isotope.

The invention discloses an infrared nonlinear optical crystal and a preparation method thereof. The molecular formula of the crystal is BaZnGeSe4; the crystal has a non-centrosymmetric structure and belongs to an orthorhombic crystal system; and the space group is Ama2, cell parameters are as follows: a=11.3255(6) angstrom, b=11.2527(6) angstrom, c=6.2917(3) angstrom, and alpha=beta=gamma=90 degrees, the unit cell volume V=801.83(7) angstrom<3> and Z=4. The crystal disclosed by the invention is prepared by two times of sintering through adopting a high-temperature solid-phase reaction method. A crystal powder multiple-frequency test shows that the crystal has a strong nonlinear effect and the multiple-frequency signal strength is equal to that of AgGaS2; the crystal has an application potential in the field of infrared laser frequency conversion; meanwhile, the BaZnGeSe4 has one type of phase matching properties; and the preparation method disclosed by the invention is simple, feasible and reliable.

The invention relates to a nonlinear optical crystal of large-size sodium borate vanadium, and a preparation method and application thereof. The crystal has the molecular formula of Na3B6VO13, belongs to the rhombic system, and has the molecular weight of 392.77, the crystal size of 10-60mm multiplied by 10-60mm multiplied by 10-60mm and the Mohs hardness of 5.5; a sodium borate vanadium compound is adopted to be evenly mixed with a fluxing agent, heated until constant temperature, and cooled until saturation temperature, thus obtaining a mixed solution; seed crystal is placed into the mixed solution, and the temperature is decreased until the saturation temperature, thus obtaining the required crystal; the crystal is extracted from liquid surface, and the temperature is decreased until room temperature, thus obtaining the nonlinear optical crystal of large-size sodium borate vanadium. The nonlinear optical effect of the nonlinear optical crystal of large-size sodium borate vanadium is half of the effect of the KDP crystal, and the light transmitting wave range of the crystal is 375nm to 3000nm. The nonlinear optical crystal of the large-size sodium borate vanadium has the advantages of simple operation, low cost, large crystal size, short growth period, less inclusion, high laser damage threshold, good mechanical performance, non-easy fracture, stable physicochemical property, non-deliquescence and easy process and storage, etc. The nonlinear optical crystal of the invention can be widely used in frequency doubling conversion and nonlinear optical devices such as optical parametric oscillators, etc.

The invention discloses AgInSe2 nanocrystalline and a preparation method thereof. The preparation method comprises the following steps: mixing and uniformly stirring silver nitrate, indium chloride and / or indium chloride tetrahydrate, selenium dioxide, polyvinylpyrrolidone and dimethyl formamide to obtain a precursor liquid; allowing the precursor liquid to have a constant-temperature reaction in a high-pressure kettle at the temperature of 160-220 DEG C for 3-20 hours to obtain the AgInSe2 nanocrystalline, wherein the AgInSe2 nanocrystalline is a metastable orthorhombic crystal system of which the space group is Pna21 and is soluble in water. The preparation method disclosed by the invention adopts simple and cheap raw materials and is simple in process, short in synthesis period, good in repeatability and environment-friendly; and the prepared AgInSe2 nanocrystalline can be well dispersed in a water phase and has application advantages in the fields such as biomedicines and water-phase optical catalysis.

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.