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37results about How to "Stable growth process" patented technology

Chromium-doped calcium magnesium silicate tunable laser crystal and preparation method thereof

The invention provides a chromium-doped calcium magnesium silicate tunable laser crystal and a preparation method thereof. The crystal has a molecular formula of Cr<3+>:CaMgSi2O6. The crustal belongs to a monoclinic system, and a space group of C12 / c1. Cell parameters of the crystal are that a=9.741 angstrom, b=8.901 angstrom, c=5.257 angstrom, beta=105.97 DEG, V=439.1 angstrom<3>, Z=4, and Dc=3.271 g / cm3. Cr<3+>:CaMgSi2O6 is a same-composition molten compound. High-optical-quality and large-size crystals can be grown with a Czochralski method. Growth conditions comprise that: a growth temperature is 1500 DEG, a pulling speed is 0.2-0.8mm / h, and a crystal rotation speed is 10-20rpm. A tunable range is 700-1350nm. The crystal is possible to become a novel tunable laser crystal, and can be practically applied.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Chromium-doped potassium scandium tungstate tunable laser crystal

The invention provides a chromium-doped potassium scandium tungstate tunable laser crystal. 60-90at% of K2W2O7 serves as a fluxing agent, the cooling rate is 1-5DEG C / day, and the revolving speed is 5-30turns / minute. The Cr<3+>: KSc(WO4)3 crystal with high quality and bigger size grows. The crystal belongs to a trigonal system and has a space group structure. The crystal can serve as the tunable laser crystal of which the tunable range is 750-1200nm, and the solid crystal made of the crystal can be used for various fields, such as spectroscopy, biomedicine and military.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Tunable laser crystal chrome-mixing magnesium molybdate and preparation method thereof

The invention provides a tunable laser crystal chrome-mixing magnesium molybdate and a preparation method thereof. A fused salt top-seeded method is adopted, 55-80at.%K2Mo2O7 serves as a fluxing agent, growth parameters include that cooling speed is 0.5-5 DEG C / day, growth temperature is 700-880 DEG C, rotation speed is 5-30 turns / minute, and high quality big-sized Cr 3+: MgMoO4 crystal is grown. The crystal belongs to a monoclinic system and has a C2 / m space group structure, and a=10.273, b=9.288, c=7.025, beta=106.96 degrees, z=8, V=641.14, and Dc=3.82 g / cm3. The crystal has the advantages of being moderate in mechanical performance, wide in tunable laser wave band, big in emission section, short in fluorescence service life and the like and is a good tunable laser crystal material.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Self-frequency doubling laser crystal Nd-doped calcium niobate

The present invention relates to artificial crystal, and is especially one kind of self-frequency doubling laser crystal, Nd:Ca2Nb2O7 crystal, and its preparation process. By means of Czochralski process in the conditions of growing temperature 1600 deg.c, pulling speed 0.5-2 mm / hr and rotation speed 5-20 rpm, high quality and large size Nd:Ca2Nb2O7 crystal may be obtained. As one new kind of laser crystal, the Nd:Ca2Nb2O7 crystal can output laser beam of wavelength or self-frequency doubling green laser beam of wavelength 534 nm. The laser of Nd:Ca2Nb2O7 crystal may find its wide application in spectroscopy, biomedicine, military and other fields.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Cr<3+>:KMgSc(WO4)3 doped tunable laser crystal and method for preparing same

The invention provides a Cr<3+>:KMgSc(WO4)3 doped tunable laser crystal and a method for the crystal. The crystal belongs to the trigonal system and has the space group as descried in the description and the following cell parameters: a=9.493A, C=24.545A, V=1915.68A<3>, Z=6 and Dc=4.412g / cm<3>. The crystal can be grown by using flux growth method, wherein the 60-80at% K2W2O7 is used as flux, the temperature decreasing speed is 1-5 DEG C per day, and the rotating speed is 5-30rpm. The high-quality large-size Cr<3+>:KMgSc(WO4)3 crystal has the tunable range of 710-1300nm and is expected to become a novel tunable laser crystal for practical application.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Doped neodymium lithium lanthanum barium tungstate laser crystal and its preparation method and usage

In this invention, C20chralski method is used for the growth of neodymium doped lithium lanthanum barium tungstate laser crystal. The growth conditions are: growth temperature 1410 deg.C, crystal rotation rate 15-20 r.p.m, pulling speed 1.5-3 mm / h. This crystal is of cubic crystal, space group being of Fm3m, single cell parameter a=0.859 angstrom, Z=4, single cell volum V=523.41 cubic angstrom. This invented crystal is a novel kind of laser crystal, it can produce laser output at about 1.06 micron wave length, and being prospected to be real utilization.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Neodymium-doping lanthanum calcium vanadate laser crystal and its preparation method and use

The crystal of Nd3+:Ca2La0.67(VO4)2 and the preparation method are provided in the invention. It gets the crystal in the condition of 1600deg.C, 15-25 r / min and 1.0-2.0mm / h of pulling speed. The spectrum indicates that: the crystal has big emission transition section in the wavelength of 1064nm and 880nm to generate the 1064nm and 880nm laser. The 880nm laser can generate the blue laser of 435-460nm after nonlinear optical crystal frequency doubling.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Neodymium doped lithium lanthanum tungstate lacer crystla and its prepn

The present invention relates to neodymium doped lithium lanthanum tungstate laser crystal and its preparation process, and relates to artificial crystal. In the Czochralski process at 1065 deg.c, the crystal rotated at 10-35 rpm grows in drawing speed of 0.5-0.6 mm / hr. The crystal is tetragonal one and has space group of 14(1) / a(C4h6), density of 3.152 g / cu cm and refractive index of 2.0. The crystal has one strong absorption peak at 805 nm with absorption cross section of 1.88E(-20) sq cm and hemi-peak width of 18 nm; is suitable for being pumped with laser diode; has strong fluorescent emitting peak at 1062 nm, emitting transition cross section of 21.7E(-20) sq cm, is easy to generate 1062 nm laser output, and expects to obtain practical use.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Self-frequency-doubling laser neodymium-doped BaCaBO3F crystal

The invention relates to the field of artificial lenses, in particular to a self-frequency-doubling laser neodymium-doped BaCaBO3F crystal. According to the invention, the Nd3<+>: BaCaBO3F crystal with high quality and larger size can grow by adopting a Czochralski method and at a temperature about 1096 DEG C, a crystal rotating speed of 10-30rpm and a pulling speed of 0.5-2.0mm / h. The Nd3<+>: BaCaBO3F crystal is a novel laser crystal and can generate laser output with wavelengths about 1068bn and 940nm. Meanwhile, because the crystal has a nonlinear optical effect, 534nm green light output and 470nm blue light output can be obtained by self-frequency-doubling. Lasers manufactured by utilizing the crystal disclosed by the invention can be used in the multiple fields, such as spectroscopy, biomedicine, military and the like.
Owner:HUAINAN NORMAL UNIV

Air filter material as well as preparation method and application of air filter material

The invention discloses an air filter material. The air filter material comprises a base material, a crystal nucleus inlaid on the surface of the base material and a nano zinc oxide crystal rod growing on the crystal nucleus, wherein the base material is melt-blow non-woven cloth, the crystal nucleus is made of nano tourmaline and consists of a hydrophilic hemisphere and an oleophylic hemisphere, the oleophylic hemisphere is inlaid into the base material, and the hydrophilic hemisphere is exposed on the surface of the base material. The invention also relates to a preparation method and application of the air filter material. According to the invention, the air filter material has the advantages of low resistance, high filter efficiency, good purifying effect and good market prospect.
Owner:C CLOUD FILTER

Method for improving tobacco quality by modest extension of vegetative growth period of flue-cured tobaccos

The invention discloses a method for improving the tobacco quality by the modest extension of a vegetative growth period of flue-cured tobaccos. The method comprises the processes of primed pelleted seeds of flue-cured tobaccos, seeding, seedbed growing, transplanting, growth in field and the like, wherein the seeds germinate again before sowing the primed pelleted seeds of flue-cured tobaccos; the nutritional regulation is performed for the first time 10 days after transplanting in the field, the dosage is 5 kg per acre; the nutritional regulation is performed for the second time 35 days after transplanting in the field, the dosage is 10 kg per acre. The method is convenient for the flue-cured tobaccos to fully absorb nutrients in the vegetative growth period, is more conducive to accumulating dry matters of leaves, improving the chemical components, appearance quality and sensory evaluation of the flue-cured tobaccos and improving the quality of tobaccos by delaying the flower bud differentiation time of the flue-cured tobaccos, extending the vegetative growth period of the flue-cured tobaccos and shortening a reproductive growth period of the flue-cured tobaccos.
Owner:GUIYANG OFFICE OF GUIZHOU TOBACCO CORP

Chromium-doped calcium aluminum niobate tunable laser crystal and preparation method thereof

The invention provides a chromium-doped calcium aluminum niobate tunable laser crystal. The chemical formula of the crystal material is: Cr<3+>:Ca2AlNbO6. The crystal belongs to monoclinic system andhas a P21 / c space group structure, and has the following cell parameters: a=5.378angstrom, b=5.4154angstrom, c=7.6248angstrom, beta=89.970(2)degree, and Z=2. The invention also provides a preparationmethod of the above-mentioned tunable laser crystal. The method includes: adopting CaCO3, Al2O3, Nb2O5 and Cr2O3 as the initial raw materials, conducting solid-phase synthesis and double sintering toprepare Cr<3+>:Ca2AlNbO6 raw material, and subjecting the Cr<3+>:Ca2AlNbO6 raw material to czochralski growth into a large size and high optical quality crystal. The crystal provided by the inventioncan be used as a tunable laser crystal, and the tunable range is 600-1000nm.
Owner:SHANGHAI INST OF TECH

(Yb<3+>: LaMgB5O10) doped laser crystal and preparation method thereof

The invention relates to a (Yb<3+>: LaMgB5O10) doped laser crystal and a growth method thereof. The crystal belongs to a monoclinic system and a P21 / c space group; cell parameters are shown in the specification, wherein Z=4, and Dc=3.92 g / cm<3>. The crystal can be grown by using a flux growth method; by taking Li2O-B2O3-LiF as a mixed flux, under the conditions that the growth temperature is 900-980 DEG C, the cooling rate is 0.5-3 DEG C / day and the rotating speed is 5-30 r / min, a Yb3<+>: LaMgB5O10 single crystal with a high quality and a relatively large size is grown. The crystal shows relatively broad absorption and emission spectrums. The crystal can become a new ultra-short pulse laser crystal, and can be practically applied.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Chromium-doped molybdic acid aluminum rubidium tunable laser crystal, and preparation method and application thereof

The invention discloses a tunable laser crystal doped with chrome, molybdenum, acid, aluminium and rubidium, and a preparation method and application thereof, and relates to a laser crystal material which can be used as the working substance of a tunable solid laser; the method adopts 60 to 80at percent of Rb2Mo3O10 as fusing assistant, with the temperature reduction speed of 1 to 5 DEG C / day and the rotating speed of 5 to 30 revolutions / minute, and Cr3+:RbAl(MoO4)2 crystal with high quality and larger size grows; and the crystal belongs to the trigonal system and has P3ml(D3d<3>) space group structure and the refractive index of 1.73. The crystal can be used as the tunable laser crystal with the tunable range between 710 to 1000nm and the solid laser made by the crystal can be used in the fields of spectroscopy, biomedicine and military science and the like.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Chromium-doped strontium aluminum niobate tunable laser crystal as well as preparation method and application thereof

The invention relates to a chromium-doped strontium aluminum niobate tunable laser crystal and a preparation method thereof. A chemical formula of the crystal material is Cr<3+>:Sr2AlNbO6. The Cr<3+>:Sr2AlNbO6 crystal belongs to a cubic system and has a space group structure; a melting point of the Cr<3+>:Sr2AlNbO6 is 1790 DEG C, the Cr<3+>:Sr2AlNbO6 belongs to congruent melting compounds, so thatthe crystal with a large size and higher optical uniformity can be grown by a pulling process; the crystal growth parameters of the Cr<3+>:Sr2AlNbO6 are as follows: the rotation speed of a seed rod is 10-55 rpm, and the pulling rate is 1-3.5 mm / h, and after the crystal growth is completed, cooling is performed to room temperature at a rate of 10-65 DEG C / h to grow the Cr<3+>:Sr2AlNbO6 crystal, wherein the Cr<3+> doping concentration is 0.1-10.0 at%; and the Cr<3+>:Sr2AlNbO6 crystal has a tunable range from 730 nm to 850 nm, and can be used as a tunable laser crystal.
Owner:SHANGHAI INST OF TECH

Self activation laser crystal scandium-strontium-ytterbium borate and preparation method thereof

The invention discloses a self-activation laser crystal scandium-strontium-ytterbium borate (YbSr6Sc(BO3)6) and preparation method, wherein a Czochralski method and a molten salt growth method are employed to grow YbSr6Sc(BO3)6 crystal with high quality and rather large scale, the crystal belongs to R3 space group, and the density is 4.48g / cm3. Optical spectrum and calculation show that, it is easy for the crystal to produce broadband laser output having a wavelength around 1020 nm. The solid-state laser made by the crystal can be applied into the fields of optical spectroscopy, biological medicine and military purpose.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Tunable laser crystal chrome-doped sodium magnesium molybdate and preparation method thereof

The invention provides tunable laser crystal chrome-doped sodium magnesium molybdate and a preparation method thereof. A molten salt top seed crystal method is adopted, 55-80at.% of Na2Mo2O7 is used as a melting assistant, and the growth parameters are as follows: the cooling velocity is 0.5-3 DEG C / day, the growth temperature is 800-880 DEG C, the rotation speed is 5-30rpm / minute, and a Cr<3+>:Na2Mg5(MoO4)6 crystal which is relatively good in quality and relatively large in size is grown, wherein the doping concentration of Cr<3+> is 0.2-5at.%. The crystal belongs to a triclinic system, and has a P-1 space group structure as shown in the specification. The crystal has the characteristics that the mechanical property is moderate, the tunable laser wave band is wide, the emission cross section is large, and the like, and is a relatively good tunable laser crystal material.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Self excited laser crystal sc-sr-Nd borate and its preparation

A self-activating laser crystal NdSr6Sc(BO3)6 is prepared by pull method or molten-salt growth method, and has high quality and bigger size. It has a strong absorption peak at 808 nm position with 36.1 / cm of absorptivity, so it is suitable to use laser diode (LD) to pump. It also has a strong fluorescence emitting peak at 1060 nm position with 1.31X10 to the power -19 sq.cm of emitting transmition cross-section, so easily outputting 1060 nm laser.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Self-active laser crystal erbium calcium vanadate and preparation method thereof

The invention discloses a self-activating laser crystal erbium calcium vanadate and a preparation method thereof, and relates to the artificial crystal field. A crystal pulling method is adopted to grow Ca9Er(VO4)7 crystal. The crystal belongs to an R3cH space group, the unit cell parameters as follows: a equals 10.855, c equals 37.967, Z equals 6, V equals 3874.62<3>, and the density is 3.43g / cm<3>. spectral test proves that the crystal has a strong absorption peak at 1515nm, the absorption coefficient of the absorption peak is 16.42cm<-1>, the half peak width thereof is 64nm, the absorption section thereof is 1.06*10<-20>cm<2>, and the crystal is suitable for pumping by a laser diode (LD). Furthermore, the crystal has a strong fluorescence emission peak at the wavelength of 1585nm, the half peak width of the fluorescence emission peak is 74nm, the fluorescence life time thereof is 3.79ms, and the crystal easily produce laser output with the wavelength of 1585nm. The self-activating laser crystal erbium calcium vanadate is applicable to a miniature laser as a microchip laser crystal.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

A method for improving the quality of tobacco leaves by moderately prolonging the vegetative growth period of flue-cured tobacco

The invention discloses a method for improving the tobacco quality by the modest extension of a vegetative growth period of flue-cured tobaccos. The method comprises the processes of primed pelleted seeds of flue-cured tobaccos, seeding, seedbed growing, transplanting, growth in field and the like, wherein the seeds germinate again before sowing the primed pelleted seeds of flue-cured tobaccos; the nutritional regulation is performed for the first time 10 days after transplanting in the field, the dosage is 5 kg per acre; the nutritional regulation is performed for the second time 35 days after transplanting in the field, the dosage is 10 kg per acre. The method is convenient for the flue-cured tobaccos to fully absorb nutrients in the vegetative growth period, is more conducive to accumulating dry matters of leaves, improving the chemical components, appearance quality and sensory evaluation of the flue-cured tobaccos and improving the quality of tobaccos by delaying the flower bud differentiation time of the flue-cured tobaccos, extending the vegetative growth period of the flue-cured tobaccos and shortening a reproductive growth period of the flue-cured tobaccos.
Owner:GUIYANG OFFICE OF GUIZHOU TOBACCO CORP

Erbium-doped yttrium barium lithium molybdate laser crystal and preparation method and application thereof

The invention relates to an erbium-doped yttrium barium lithium molybdate laser crystal and a preparation method and application thereof. The high-quality Er<3+>:Li3Ba2Y3(MoO4)8 crystal with large size is grown by using 60-80at% Li2MoO4 as a fluxing agent under the conditions that the cooling rate is 0.5-2 DEG C / day and the rotating speed is 5-30r / min. The crystal belongs to the monoclinic systemand has C2 / c space group structure. The crystal is a novel laser crystal and can generate and output lasers with wavelength being about 1500nm.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Neodymium-doped gadolinium barium lithium tungstate laser crystal and preparation method and application thereof

The invention relates to a neodymium-doped gadolinium barium lithium tungstate laser crystal and a preparation method and application thereof. The high-quality crystal with large size is grown by using 30-60at% Li2WO4 as a fluxing agent under the conditions that the cooling rate is 0.5-2 DEG C / day and the rotating speed is 5-30r / min. The crystal belongs to the monoclinic system and has C2 / c spacegroup structure. The main absorption peak of the Nd<3+>:Li3Ba2Gd3(WO4)8 crystal is 804nm, the half-peak width is 19nm and the absorption transition cross section is 5.37*10<-20>cm<2>, and the crystalis suitable for being pumped by the AsGaAl semiconductor laser. A quite wide emission band exists in the range from 850nm-1400nm. The emission transition cross section at the emission peak of 1064nm is 12.08*10<-20>cm<2>, the fluorescence lifetime is 0.153ms, and the crystal is easy to generate and output lasers with wavelength being 1064nm.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Doped neodymium lithium lanthanum barium tungstate laser crystal and its preparation method and usage

In this invention, C20chralski method is used for the growth of neodymium doped lithium lanthanum barium tungstate laser crystal. The growth conditions are: growth temperature 1410 deg.C, crystal rotation rate 15-20 r.p.m, pulling speed 1.5-3 mm / h. This crystal is of cubic crystal, space group being of Fm3m, single cell parameter a=0.859 angstrom, Z=4, single cell volum V=523.41 cubic angstrom. This invented crystal is a novel kind of laser crystal, it can produce laser output at about 1.06 micron wave length, and being prospected to be real utilization.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Rare earth active ion doped calcium magnesium silicate laser crystal as well as preparation method and application thereof

The invention relates to a growing method and an application of an Ln<3+> rare earth active ion doped calcium magnesium silicate laser crystal, wherein Ln<3+> is equal to Nd, Yb, Tm, Dy, Er and Ho. The crystal belongs to a monoclinic crystal system, the space group is C12 / c1, and cell parameters are as follows: a is equal to 9.741 angstroms, b is equal to 8.901 angstroms, c is equal to 5.257 angstroms, beta is equal to 105.97 degrees, V is equal to 439.1 angstroms <3>, Z is equal to 4 and Dc is equal to 3.271g / cm<3>. Trivalent rare earth ions can replace lattice sites of divalent calcium ions in the crystal. The compound is a congruent melting compound and has a melting point of 1,500 DEG C, and the crystal with high optical quality and large size is easily grown with a pulling method. The crystal can be taken as a laser crystal. A laser prepared from the crystal is expected to produce efficient laser light and has significant application in the fields of social production, military, medicine, science and the like.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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