65 results about "Crystal chemistry" patented technology

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 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 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 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 basedon 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 preparedthrough 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 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 calcium metaborate birefraction crystal as well as a preparation method and a purpose thereof. The chemical formula of the crystal is CaB2O4; the molecular weight is 125.70;the crystal belongs to an orthorhombic system; the space group is Pbcn; the crystal cell parameters a being equal to 11.60(4) angstrom, b being equal to 4.28(8) angstrom and c being equal to 6.21(6)angstrom; Z is 4. The calcium metaborate birefraction crystal is a negative biaxial crystal; the transmission range is 165 to 3400nm; the birefraction rate is 0.09 to 0.36; a flux method, a cosolventmethod, a crucible descending method or a heat exchange method is used for growing the crystals . The crystal obtained by the method can easily grow, can be easily processed, can be used for infraredray-visible light-ultraviolet-deep ultraviolet wave bands for manufacturing polarized beam splitting prims such as Glan prisms, Wollaston prisms and Rochon prisms and optical elements such as optoisolators, circulator and light beam displacement devices, and has the important application in the fields of optics, laser etching and communication.