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Transparent glass ceramic capable of conversion luminescence under near-infrared quantum cutting and preparation method thereof

A technology of transparent glass and quantum tailoring, which is applied in the field of rare earth doped transparent glass ceramics and its preparation technology, can solve the problems of weak absorption strength, difficulty in efficiently utilizing sunlight, etc., and achieves low cost, good mechanical properties and thermal stability. The effect of performance and simple preparation process

Inactive Publication Date: 2012-06-27
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the 4f-4f transition of the lanthanide trivalent rare earth is parity forbidden, its absorption intensity is weak, which makes it difficult to efficiently use sunlight

Method used

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  • Transparent glass ceramic capable of conversion luminescence under near-infrared quantum cutting and preparation method thereof
  • Transparent glass ceramic capable of conversion luminescence under near-infrared quantum cutting and preparation method thereof
  • Transparent glass ceramic capable of conversion luminescence under near-infrared quantum cutting and preparation method thereof

Examples

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Effect test

example 1

[0019] Example 1: Analytical pure SiO 2 、Al 2 o 3 , CaCO 3 , NaF, CaF 2 and EuF with a purity of 99.99% 3 , YbF 3 Powder, according to 45SiO 2 -25Al 2 o 3 -5CaCO 3 -10NaF-12.5CaF 2 -0.5EuF 3 -2YbF 3 After weighing the proportion accurately, put it in an agate mortar, grind it for more than half an hour to make it evenly mixed, then put it in a platinum crucible, heat it to 1350°C in a program-controlled high-temperature box-type resistance furnace, and keep it warm for 2 hours to melt it. Then, the melt was taken out and quickly poured into a copper mold for cooling and forming to obtain a precursor glass; the precursor glass was placed in a resistance furnace, annealed at 430°C for 2 hours and then cooled with the furnace to eliminate internal stress. The annealed glass was kept at 590°C for 6 hours to partially crystallize it to obtain transparent glass ceramics.

[0020] Powder X-ray diffraction pattern ( figure 1 ) analysis shows that the crystal phase precip...

example 2

[0021] Example 2: Analytical pure SiO 2 、Al 2 o 3 , CaCO 3 , NaF, CaF 2 and EuF with a purity of 99.99% 3 , YbF 3 Powder, according to 30SiO 2 -35Al 2 o 3 -10CaCO 3-15NaF-8CaF 2 -1EuF 3 -1YbF 3 After weighing the proportion accurately, place it in an agate mortar, grind it for more than half an hour to make it evenly mixed, then place it in a platinum crucible, heat it to 1300°C in a program-controlled high-temperature box-type resistance furnace, and keep it warm for 1 hour to melt it. Then, the melt was taken out and quickly poured into a copper mold for cooling and forming to obtain a precursor glass; the precursor glass was placed in a resistance furnace, annealed at 430°C for 2 hours and then cooled with the furnace to eliminate internal stress. The annealed glass was kept at 590°C for 6 hours to partially crystallize it to obtain transparent glass ceramics. After surface polishing, the sample was measured with FLS920 fluorescence spectrometer at room tempera...

example 3

[0022] Example 3: Analytical pure SiO 2 、Al 2 o 3 , CaCO 3 , NaF, CaF 2 and EuF with a purity of 99.99% 3 , YbF 3 Powder, according to 50SiO 2 -20Al 2 o 3 -10CaCO 3 -5NaF-14.4CaF 2 -0.1EuF 3 -0.5YbF 3 The proportion is accurately weighed and placed in an agate mortar, ground for more than half an hour to make it evenly mixed, then placed in a platinum crucible, heated to 1400°C in a program-controlled high-temperature box-type resistance furnace, and then kept for 3 hours to melt it. Then, the melt was taken out and quickly poured into a copper mold for cooling and forming to obtain a precursor glass; the precursor glass was placed in a resistance furnace, annealed at 430°C for 2 hours and then cooled with the furnace to eliminate internal stress. The annealed glass was kept at 590°C for 6 hours to partially crystallize it to obtain transparent glass ceramics. After surface polishing, the sample was measured with FLS920 fluorescence spectrometer at room temperatur...

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Abstract

The invention discloses a transparent glass ceramic capable of conversion luminescence under near-infrared quantum cutting. The glass ceramic comprises the following components expressed in mole percent: 30 to 50 mol% of SiO2, 20 to 35 mol% of Al2O3, 5 to 20 mol% of CaCO3, 5 to 20 mol% of NaF, 9.6 to 14.5 mol% of CaF2, 0.1 to 1.0 mol% of EuF3 and 0 to 2 mol% of YbF3. A sample is prepared by using a melt quenching process and subsequent heat treatment; a preparation method for the transparent glass ceramic is simple, produces no pollution and costs little. Coupling of the transparent glass ceramic with a silicon solar cell can hopefully reduce the thermalization effect of the silicon solar cell and improve photoelectric conversion efficiency of the cell.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a near-infrared quantum tailoring down-conversion luminescent rare earth-doped transparent glass ceramic capable of broadband excitation and a preparation process thereof. technical background [0002] In today's world, traditional fossil energy is gradually being exhausted, and human beings urgently need to develop and apply new energy. Solar energy is both a primary energy source and a renewable energy source. The use of silicon solar cells for photovoltaic power generation has become a new energy technology that various developed countries are competing to develop. At present, the photoelectric conversion efficiency of common monocrystalline silicon solar cells on the market is about 15-18%; according to calculations, the theoretical efficiency of single P-N junction silicon solar cells with a band gap of 1.1eV does not exceed 30%. This is due to the mismatch betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16C03B32/02
Inventor 林航陈大钦余运龙王元生
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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