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Transparent ceramic material of dual adulterated yttruim aluminum garnet, and prepartion method

A technology of yttrium aluminum garnet and transparent ceramics, which is applied in the field of laser transparent ceramic materials preparation, can solve the problems of low thermal conductivity, low thermal expansion coefficient, and unsatisfactory laser efficiency, and achieve high linear transmittance and good mechanical properties Effect

Inactive Publication Date: 2007-02-21
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although glass can easily be made into a large size, its thermal conductivity is an order of magnitude lower than that of single crystal
Glass-ceramic is a heterogeneous material with a very low (even negative) thermal expansion coefficient and good thermal shock resistance, but the laser efficiency is not satisfactory compared with single crystal materials
Scientists have tried to use Dy:CaF since the 1960s 2 , NDY and other polycrystalline ceramics are used as working materials for solid-state lasers, but the effects are not ideal

Method used

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  • Transparent ceramic material of dual adulterated yttruim aluminum garnet, and prepartion method
  • Transparent ceramic material of dual adulterated yttruim aluminum garnet, and prepartion method
  • Transparent ceramic material of dual adulterated yttruim aluminum garnet, and prepartion method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 25.4645g of α-Al with a purity of 99.99% 2 o 3 Powder, 33.4778g of Y with a purity of 99.99% 2 o 3 Powder, 0.5047g Nd with a purity of 99.95% 2 o 3 Powder, 0.0280g of CaO powder with a purity of 99.99%, 0.0380g of Cr with a purity of 99.99% 2 o 3 Put the powder and 0.2976g of high-purity TEOS into a polytetrafluoroethylene ball mill jar, add 180g of high-purity agate balls and 22ml of absolute ethanol, and then ball mill for 10 hours. After drying in an oven at 90°C, it was ground through a 100-mesh sieve. Use 100MPa pressure to press axially and unidirectionally, press it into a Φ20 disc, and then cold isostatic press under 300MPa pressure to further increase the density of the green body. Sintering is carried out in a vacuum sintering furnace, and the sample is placed in a molybdenum crucible. The heating rate of the furnace is: 30°C / min from room temperature to 1150°C, 10°C / min from 1150°C to 1780°C, and 10 hours at 1780°C. From 1780°C to 1500°C, the tempera...

Embodiment 2

[0049] 25.4645g of α-Al with a purity of 99.99% 2 o 3 Powder, 33.4778g of Y with a purity of 99.99% 2 o 3 Powder, 0.5047g Nd with a purity of 99.95% 2 o 3 Powder, 0.0280g of CaO powder with a purity of 99.99%, 0.0380g of Cr with a purity of 99.99% 2 o 3 Put the powder and 0.2976g of high-purity TEOS into a polytetrafluoroethylene ball mill jar, add 180g of high-purity agate balls and 22ml of absolute ethanol, and then ball mill for 10 hours. After drying in an oven at 90°C, it was ground through a 100-mesh sieve. Use 100MPa pressure to press axially and unidirectionally, press it into a Φ20 disc, and then cold isostatic press under 300MPa pressure to further increase the density of the green body. Sintering is carried out in a vacuum sintering furnace, and the sample is placed in a molybdenum crucible. The heating mechanism of the furnace is: 30°C / min from room temperature to 1200°C, 10°C / min from 1200°C to 1770°C, and 30 hours at 1770°C. From 1770°C to 1500°C, the te...

Embodiment 3

[0051] 25.4645g of α-Al with a purity of 99.99% 2 o 3 Powder, 33.4778g of Y with a purity of 99.99% 2 o 3 Powder, 0.5047g Nd with a purity of 99.95% 2 o 3 Powder, 0.0280g of CaO powder with a purity of 99.99%, 0.0380g of Cr with a purity of 99.99% 2 o 3 Put the powder and 0.2976g of high-purity TEOS into a polytetrafluoroethylene ball mill jar, add 180g of high-purity agate balls and 22ml of absolute ethanol, and then ball mill for 10 hours. After drying in an oven at 90°C, it was ground through a 100-mesh sieve. Use 100MPa pressure to press axially and unidirectionally, press it into a Φ20 disc, and then cold isostatic press under 300MPa pressure to further increase the density of the green body. The biscuit is pre-sintered in a silicon carbide rod furnace at 800°C, and the heating rate is 5°C / min. Then the pre-sintered body continues to be sintered in a vacuum sintering furnace, and the sample is placed in a molybdenum crucible. The heating rate of the furnace is: 3...

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Abstract

This invention relates to a method for preparing double-doped YAG transparent ceramic material. For Cr4+- and Nd3+-doped system, Tthe doping amount of Cr4+ is 0.02-0.5 at%, while that of Nd3+ is 0.4-4.0 at%. For Cr4+- and Yb3+-doped system, the doping amount of Cr4+ is 0.01-0.5 at%, while that of Yb3+ is 5-30 at%. The method comprises: evenly mixing the powdery raw materials, performing dry pressing and cold static pressing, sintering in a vacuum furnace, and annealing. The light transmittance of the double-doped YAG transparent ceramic material is higher than 70%, and can be used as the working substance of self-regulating Q solid laser.

Description

technical field [0001] The present invention relates to double-doped yttrium aluminum garnet transparent ceramics and a preparation method, more specifically to Cr 4+ ,Nd 3+ :YAG and Cr 4+ , Yb 3+ The invention relates to YAG self-Q-switching laser transparent ceramics and a preparation method thereof, belonging to the technical field of laser transparent ceramic material preparation. Background technique [0002] The optoelectronic industry is an important pillar industry in the 21st century, and laser technology is the core component of optoelectronic technology. As the main body of solid-state lasers, laser materials are an important pillar of solid-state laser technology. At present, the Nd:YAG laser materials on the market are all single crystals. Due to their long growth cycle, high price, small size, and low doping concentration, their performance and application range are limited. For many years, scientific researchers have tried to use glass and glass ceramics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/50C04B35/622C04B35/624
Inventor 李江吴玉松邱发贵潘裕柏郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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