484 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 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 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 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 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 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 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.

The invention discloses a coordination polymer porous material MAF-X8 and a preparing method and an application thereof. The chemical formula of the coordination polymer porous material MAF-X8 is [Zn (mpba)], wherein the [Zn (mpba)] represents negative ions obtained by removing protons of an organic ligand 2-(3,5-Dimethyl-1H-pyrazol-4-yl) benzoic acid (H2mbpa). MAF-X8 crystals are in an orthorhombic system, an Ibca space group, and in a three-dimensional frame structure with a single-dimensional pore passage formed through the bridging of mbpa2-ligands and quadridentate Zn2+ ions and with a pore rate of 50%, the Langmuir specific surface is larger than 1300m2/g, and good ghermal stability and chemical stability are provided. Particularly, the coordination polymer porous material MAF-X8 can be conveniently manufactured into thin films to be applied in solid phase micro extraction (SPME), and shows high accumulation ability and adsorption selectivity to non-polar benzene series, and has short adsorption and desorption time, low detection limit, wide linear range and the like simultaneously.