Transparent glass ceramics containing fluorapatite crystals and preparation method thereof

A calcium fluorophosphate and glass-ceramic technology, applied in the field of quantum tailoring, can solve the problems of limited absorption and utilization, and low practical efficiency of spectral conversion, and achieve good mechanical and chemical stability, simple preparation method, and high absorption efficiency Effect

Inactive Publication Date: 2015-03-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the above-mentioned research system, although the theoretical quantum tailoring efficiency and energy conversion efficiency are high, due to the above-mentioned rare earth ion Re 3+ The absorption and utilization of ultraviolet bands are limited, so the existing quantum tailoring materials are actually not efficient in the spectral conversion of ultraviolet bands in sunlight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A. Prepare materials according to the following mole percentages, and then mix uniformly:

[0032] SiO 2 45%AlPO 4 12%

[0033] Al 2 o 3 6% CaO 15%

[0034] CaF 2 18.9% ErO 3 0.1%

[0035] Yb 2 o 3 1% CeO 2 2%;

[0036] B. Add 10% carbon powder of the mass of the mixture to the mixture obtained in step A for mixing, then place it in an alumina crucible and keep it warm at 1300°C for 120 minutes to melt the mixture into a liquid state, then cast it on a metal plate and Flatten to get glass;

[0037] C. The glass obtained in step B is annealed at 650°C for 3 hours, and then heat-treated at 700°C for 12 hours to precipitate microcrystals in the glass, and then naturally cool to room temperature with the furnace to obtain transparent microcrystals containing calcium fluorophosphate crystals. Crystal glass, consisting of the following components in molar percentages:

[0038] SiO 2 45%AlPO 4 12%

[0039] Al 2 ...

Embodiment 2

[0043] A. Prepare materials according to the following mole percentages, and then mix uniformly:

[0044] SiO 2 40%AlPO 4 16%

[0045] Al 2 o 3 8% CaCO 3 20.8%

[0046] CaF 2 12% EuF 3 0.2%

[0047] wxya 3 1% CeF 3 2%;

[0048] B. The mixed material obtained in step A is in H 2 In a reducing atmosphere, heat the mixture at 1400°C for 60 minutes to melt the mixture into a liquid state, then cast it on a metal plate and flatten it to obtain glass;

[0049] C. The glass obtained in step B is annealed at 670°C for 0.5 hours, and then heat-treated at 720°C for 6 hours to precipitate microcrystals in the glass, and then naturally cool to room temperature with the furnace to obtain transparent microcrystals containing calcium fluorophosphate crystals. Crystal glass, consisting of the following components in molar percentages:

[0050] SiO 2 40%AlPO 4 16%

[0051] Al 2 o 3 8% CaO 20.8%

[0052] CaF 2 1...

Embodiment 3

[0055] A. Prepare materials according to the following mole percentages, and then mix uniformly:

[0056] SiO 2 25.9%AlPO 4 36%

[0057] Al 2 o 3 6% CaO 15%

[0058] CaF 2 12% Eu 2 o 3 2%

[0059] Yb 2 o 3 0.2% CeO 2 1%

[0060] CeF 3 1.9%;

[0061] B. The mixture obtained in step A is kept at 1500° C. for 30 minutes under a reducing atmosphere of CO to melt the mixture into a liquid state, and then cast it on a metal plate and flatten it to obtain glass;

[0062] C. The glass obtained in step B is annealed at 680°C for 6 hours, and then heat-treated at 780°C for 0.5 hour to precipitate microcrystals in the glass, and then naturally cool to room temperature with the furnace to obtain transparent microcrystals containing calcium fluorophosphate crystals. Crystal glass, consisting of the following components in molar percentages:

[0063] SiO 2 25.9%AlPO 4 36%

[0064] Al 2 o 3 6% CaO 15%

[0065]...

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Abstract

The invention provides transparent glass ceramics containing fluorapatite crystals. The transparent glass ceramics comprise the following components by mole percent: 25.9-45% of SiO2, 12-36% of AlPO4, 6-19% of Al2O3, 15-30% of CaO, 12-24% of CaF2, 0-2% of Eu2O3, 0-2% of EuF3, 0-5% of Yb2O3, 0-5% of YbF3, 0-2% of CeO2 and 0-2% of CeF3, wherein the total of Eu2O3, EuF3, CeO2 and CeF3 is not less than 0.1%; and the total of Yb2O3 and YbF3 is not less than 0.2%. The transparent glass ceramics are prepared by melting the mixture to obtain glass, then annealing the glass and then carrying out thermal treatment on the annealed glass. The obtained transparent glass ceramics have high transparency toward invisible light, good mechanical property and chemical stability and high ultraviolet light absorption efficiency. A preparation method is simple.

Description

technical field [0001] The invention relates to quantum tailoring technology, in particular to transparent glass-ceramics containing calcium fluorophosphate crystals capable of improving photoelectric conversion efficiency of silicon-based solar cells and a preparation method thereof. Background technique [0002] In the 1970s, people first discovered Pr 3+ It absorbs one vacuum ultraviolet photon, and emits two visible photons through the quantum tailoring process, which are blue light at 408nm and red light at 620nm, and its quantum efficiency is greater than 100%. In 1999, Wegh et al. reported LiGdF in Science 4 :Eu phosphor emits multiple visible photons under vacuum ultraviolet excitation to achieve a quantum efficiency of nearly 200%. The research of ionic light functional materials has been paid more and more attention by researchers at home and abroad. At present, quantum tailoring research mainly focuses on vacuum ultraviolet → multiphoton visible emission for h...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C03C10/16
Inventor宋志国邱建备杨正文周大成楼凯尹兆益余雪
OwnerKUNMING UNIV OF SCI & TECH