40results about How to "Excellent up-conversion performance" patented technology

The invention relates to an infrared-excited oxide up-conversion luminescence piezoelectric material of a bismuth lamellar perovskite-like structure and a preparation method thereof. The up-conversion luminescence piezoelectric material has a chemical general formula of Am-1-x-RxYbyBi2BmO3M<+3>, wherein R is selected from Er<3+>, Ho<3+> and Tm<3+>, A is selected from Bi<3>, Ca<2+>, Sr<2+>, Ba<2+>, Pb<2+>, Na<+>, K<+>, La<3+> and Y<3+>, B is selected from Ti<4+>, Zr<4+>, Nb<5+>, Ta<5+>, W<6+> and Mo<6+>, m is a positive integer not smaller than 2 and not more than 8, x is not smaller than 0.000001 and not more than 0.3, and y is not smaller than 3.0 and not more than 0.6. The up-conversion luminescence piezoelectric material is prepared by adopting a solid-phase reaction method, has the characteristics of good thermal stability, good chemical stability, easiness for synthesis, high luminous intensity and adjustable color, and can be widely applied to various aspects such as three-dimensional display, infrared detection, counterfeiting prevention, solar cells and photoelectric integration, micro-electro-mechanical systems, photoelectric sensing and the like.

The invention discloses a barium fluoride up-conversion transparent ceramic and a preparation method thereof, and belongs to the technical field of optically functional materials. The existing alumina up-conversion transparent ceramic has low up-conversion luminous efficiency and is prepared difficultly. The barium fluoride up-conversion transparent ceramic utilizes barium fluoride transparent ceramic as a matrix and comprises: by mole, 60 to 89% of barium fluoride, 10 to 25% of ytterbium fluoride, and 1 to 15% of one or more of fluorides of erbium, holmium, neodymium, thulium and promethium. The preparation method comprises the following steps of blending raw material nanometer powder according to the mole percentage, wherein barium fluoride powder has particle sizes of 20 to 80nm and rare earth fluoride powder has particle sizes of 10 to 90nm, pressing the blended raw material nanometer powder into a biscuit, pre-sintering the biscuit at a temperature of 500 to 800 DEG C for 0.5 to 5 hours, carrying out vacuum sintering of the pre-sintered biscuit under the conditions of pressure of 50 to 500MPa, a vacuum degree of 10<-2> to 10<-3>Pa, a heating rate of 1 to 20 DEG C/min, a sintering temperature of 600 to 1200 DEG C and sintering time of 0.5 to 5 hours, and cooling to a room temperature at a rate of 1 to 20 DEG C/min to obtain the barium fluoride up-conversion transparent ceramic.

The invention provides a preparation method of an Er<3+> and Yb<3+> co-doped YOF red up-conversion fluorescent material. The preparation method is low in heat treatment temperature, relatively wide in temperature adjusting range and simple in process. The preparation method specifically comprises the following steps: mixing yttrium nitrate, ytterbium nitrate and erbium nitrate according to a general formula mixing ratio; taking isopropanol, ethanol and water as a solvent, adding trifluoroacetic acid into the solvent, and stirring uniformly to obtain a transparent sol A; drying the transparent sol A to obtain a colloidal substance for heat treatment; heating from room temperature to 350-600DEG C, keeping the temperature for a certain period of time, cooling to the room temperature along with a furnace, and grinding to obtain Er<3+> and Yb<3+> co-doped YOF powder; or coating the transparent sol A on a glass or silicon chip substrate by virtue of a rotary coating method, drying in the air for 15-30 minutes at room temperature, then drying in a drying box at 100DEG C, then putting into a high-temperature furnace to perform annealing treatment, heating to 350-600DEG C according to a heating rate of 1-10DEG C/min, and performing heat preservation and cooling to obtain an Er<3+> and Yb<3+> co-doped YOF fluorescent thin film.

The invention relates to a red up-conversion material of oxyfluoride and a preparation method thereof. The molecular formula of the red up-conversion material of oxyfluoride is Y(5-x-y)YbxEryO4F7, wherein 0.5<=x<=2.5, and 0.05<=y<=0.25; lithium-containing compounds such as Li2CO3 and LiF are used as a fluxing agent and a spectrum regulator. The red up-conversion material of oxyfluoride provided by the invention has the advantages of stable performance, high strength, pure chroma and the like; under the 980nm laser excitation, the material can realize red up-conversion luminescence and make up for the shortcomings of few colors and varieties of the up-conversion luminous material, thereby having a good application prospect in the fields of three-dimensional display, anti-counterfeiting, medicine, high-density data storage and the like; moreover, the preparation process is finished in an air atmosphere without needing special atmosphere protection, thereby greatly reducing the production difficulty and cost and being suitable for large-scale production.

The invention discloses rare earth ion doped SrI2 microcrystalline glass. The rare earth ion doped SrI2 microcrystalline glass comprises the following components according to molar percentage: 80 to 89.5mol% of SiO2, 10 to 15mol% of SrI2 and 0.5 to 5mol% of LnI3, wherein the LnI3 is selected from at least one of YbI3, ErI3 and TmI3. The rare earth ion doped SrI2 microcrystalline glass has the advantages of transparency, deliquescence resistance, excellent mechanical property and high blue violet laser transmittance, has the properties of low phonon energy and high up-conversion efficiency, is capable of greatly improving the efficiency of an up-conversion laser, and is simple in preparation method and low in production cost.

The invention discloses rare earth ion-doped CeBr3 microcrystalline glass. The rare earth ion-doped CeBr3 microcrystalline glass comprises the following components in molar percentage: 80mol%-94.5mol% of SiO2, 5mol%-15mol% of CeBr3 and 0.5mol%-5mol% of LnBr, wherein LnBr is at least one of YbBr3, ErBr3, TmBr3 and HoBr3. The rare earth ion-doped CeBr3 microcrystalline glass has the advantages of transparency, hygroscopy resistance, good mechanical property and relatively high blue-purple ray transmittance; the microcrystalline glass has performances of low phonon energy and high upconversion efficiency; the efficiency of an upconversion laser can be greatly improved; a preparation method is simple, and the production cost is relatively low.

The invention discloses rare earth ion doped LaCl3 glass ceramics. The rare earth ion doped LaCl3 glass ceramics are prepared from SiO2 75-90.5 mol%, LaCl3 9-20 mol% and LnCl3 0.5-5 mol%, wherein the LnCl3 is at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The rare earth ion doped LaCl3 glass ceramics have the advantages that the prepared rare earth ion doped LaCl3 glass ceramics are transparent, are resistant to deliquescence, are good in mechanical performance and higher in blue and violet light transmittance, have the performances of low phonon energy, high upconversion efficiency and the like, enable the efficiency of an upconversion laser to be improved greatly, a preparation method of the glass ceramics is simple, and the production cost is lower.

The invention discloses a titanium dioxide matrix up-conversion luminescent material excited by a multi-wavelength laser at low power, which is prepared by the steps of: uniformly mixing prepared titanium oxide, lanthanum oxide, ytterbium oxide and erbium oxide and then drying for 2-3h in a vacuum drying box; and then grinding dried materials into 200-250mu powder, loading in a crucible and covering to be placed into a calcining furnace, raising the temperature to 1300-1350 DEG C at a speed of 10-15 DEG C per minute, keeping the temperature for 1-1.5h and then cooling with the furnace to the room temperature, taking out calcined materials, and grinding the calcined materials into 250-280mu powder to obtain the titanium dioxide matrix up-conversion luminescent material. The titanium dioxide matrix up-conversion luminescent material has higher chemical stability and better mechanical strength as well as excellent up-conversion property, and can be excited by a 1064nm laser under the condition of 8mw low power.

The invention discloses rare earth ion doped YCl3 microcrystalline glass which comprises the following components in mole percentage: 80.5-95mol% of SiO2, 4.5-15mol% of YCl3 and 0.5-4.5mol% of LnCl3, wherein LnCl3 is at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The rare earth ion doped YCl3 microcrystalline glass prepared by a method disclosed by the invention has the advantages of being transparent, deliquescence-resistant, good in mechanical property and relatively high in blue and purple light transmissivity, having the performances of low phonon energy, high up-conversion efficiency and the like, being capable of greatly improving the efficiency of an up-conversion laser, and being simple in preparation method and relatively low in production cost.

The invention discloses rare-earth ion doped Rb2LaBr5 microcrystalline glass comprising the following components in mole percentage: 88-93mol% of SiO2, 6.5-9mol% of Rb2LaBr5 and 0.5-3mol% of LnBr3, wherein the LnBr3 is at least one of YbBr3, ErBr3, TmBr3 and HoBr3. The rare-earth ion doped Rb2LaBr5 microcrystalline glass disclosed by the invention has the advantages of being transparent and deliquescence-resistant, good in mechanical property and relatively high in blue-violet light transmission, having the performances of low phonon energy, high up-conversion efficiency and the like, and being capable of greatly improving the efficiency of an up-conversion laser; moreover, the preparation method of the microcrystalline glass is simple, and is relatively low in production cost.

The invention discloses rare earth ion doped GdCl3 microcrystalline glass. The rare earth ion doped GdCl3 microcrystalline glass comprises the following components according to molar percentage: 80 to 93.4mol% of SiO2, 6 to 16mol% of GdCl3 and 0.6 to 4.5mol% of LnCl3, wherein the LnCl3 is selected from at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The rare earth ion doped GdCl3 microcrystalline glass has the advantages of transparency, deliquescence resistance, excellent mechanical property and high blue violet laser transmittance, has the properties of low phonon energy and high up-conversion efficiency, is capable of greatly improving the efficiency of an up-conversion laser, and is simple in preparation method and low in production cost.

The invention discloses rare earth ion doped GdI3 glass ceramic which comprises the following elements by mole percent: 75-90mol% of SiO2, 9.5-20mol% of GdI3 and 0.5-5mol% of LnCl3, wherein LnCl3 is at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The rare earth ion doped GdI3 glass ceramic has the advantages as follows: the prepared rare earth ion doped GdI3 glass ceramic is transparent, deliquescence-proof, good in mechanical property and relatively high in blue-violet light transmittance, has the properties of low phonon energy, high up-conversion efficiency, and the like, and enables the efficiency of an up-conversion laser to be improved greatly, in addition, a preparation method for the glass ceramic is simple and the production cost is relatively low.

The invention discloses a rare earth ion doped GdBr3 glass ceramics. The rare earth ion doped GdBr3 glass ceramics are prepared from SiO2 80-94 mol%, GdBr3 5.5-16 mol% and LnBr3 0.5-5 mol%, wherein the LnBr3 is at least one of YbBr3, ErBr3, TmBr3 and HoBr3. The rare earth ion doped GdBr3 glass ceramics have the advantages that the prepared rare earth ion doped GdBr3 glass ceramics are transparent, are resistant to deliquescence, are good in mechanical performance and higher in blue and violet light transmittance, have the performances of low phonon energy, high upconversion efficiency and the like, enable the efficiency of an upconversion laser to be improved greatly, a preparation method of the glass ceramics is simple, and the production cost is lower.

The invention discloses rare earth ion doped LuCl3 glass ceramics. The rare earth ion doped LuCl3 glass ceramics are prepared from SiO2 80-91.5 mol%, LuCl3 8-16 mol% and LnCl3 0.5-4.5 mol%, wherein the LnCl3 is at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The rare earth ion doped LuCl3 glass ceramics have the advantages that the prepared rare earth ion doped LuCl3 glass ceramics are transparent, are resistant to deliquescence, are good in mechanical performance and higher in blue and violet light transmittance, have the performances of low phonon energy, high upconversion efficiency and the like, enable the efficiency of an upconversion laser to be improved greatly, a preparation method of the glass ceramics is simple, and the production cost is lower.

The invention discloses rare earth ion doped K3LuCl6 glass ceramic which comprises the following elements by mole percent: 87-94mol% of SiO2, 5.6-10mol% of K3LuCl6 and 0.4-3mol% of LnCl3, wherein LnCl3 is at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The rare earth ion doped K3LuCl6 glass ceramic has the advantages as follows: the prepared rare earth ion doped K3LuCl6 glass ceramic is transparent, deliquescence-proof, good in mechanical property and relatively high in blue-violet light transmittance, has the properties of low phonon energy, high up-conversion efficiency, and the like, and enables the efficiency of an up-conversion laser to be improved greatly, in addition, a preparation method for the glass ceramic is simple and the production cost is relatively low.

The invention discloses K2CeI5 glass ceramics doped with rare earth ions. The K2CeI5 glass ceramics is prepared from 87-92 mol% of SiO2, 7.5-10 mol% of K2CeI5 and 0.5-3 mol% of LnI3, wherein LnI3 is at least one of YbI3, ErI3 and TmI3. The K2CeI5 glass ceramics has the advantages of being transparent, resistant to air slake, good in mechanical performance, high in blue and purple light transmittance, low in phonon energy, high in up-conversion efficiency, capable of greatly improving efficiency of an up-conversion laser device, simple in preparation method and low in production cost.