Method for preparing C-doped alpha-Al2O3 transparent ceramic thermoluminescent and photoluminescent material

A technology of transparent ceramics and doped materials, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of difficult preparation of large size, limited amount of carbon doping, high cost, etc., to achieve industrial scale production and preparation process Simple, low-cost-to-manufacture effect

Inactive Publication Date: 2009-10-21
苏州巍迩光电科技有限公司
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  • Abstract
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Problems solved by technology

[0004] But α-Al 2 o 3 : C crystals are difficult to grow by the pulling method, because usually the pulling method system is a weak oxidation environment, and it is difficult to mix C in the melt; even if a reducing gas is introduced, it is easy to cause C due to the open space above the melt Volatile, so α-Al 2 o 3 The typical preparation process of :C crystal is to anneal the sapphire crystal in a strong reducing atmosphere in the presence of graphite.
This makes the amount of carbon incorporation very limited and difficult to control
At the same time, the crystal growth process also requires expensive equipment, long production cycle, high cost, and it is not easy to prepare large-scale crystals.

Method used

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  • Method for preparing C-doped alpha-Al2O3 transparent ceramic thermoluminescent and photoluminescent material
  • Method for preparing C-doped alpha-Al2O3 transparent ceramic thermoluminescent and photoluminescent material
  • Method for preparing C-doped alpha-Al2O3 transparent ceramic thermoluminescent and photoluminescent material

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Embodiment 1

[0027] The preparation process of this embodiment adopts two processes including transparent ceramic sintering process and carburizing process.

[0028] The process and steps of the present embodiment are described as follows:

[0029] 1. α-Al 2 o 3 Preparation of transparent ceramics

[0030] a. Using high-purity 99.99% Al 2 o 3 , 99% MgO, 99.99% La 2 o 3 or Y 2 o 3 As raw material, with Al 2 o 3 as matrix material, MgO, La 2 o 3 or Y 2 o 3 As a sintering aid; with Al 2 o 3 The weight of the base material is 100 as the measurement basis, and the doping amount of the doping material is: La 2 o 3 or Y 2 o 3 : 0.05~0.20wt%; MgO: 0.05~0.2wt%;

[0031] b. Al prepared according to the above formula 2 o 3 Stir and mix the base material and each dopant material, and mix and grind the mixture in distilled water for 24 hours;

[0032] c. drying at a temperature of 150°C, then adding a polyvinyl alcohol binder with a concentration of 5wt%, and the addition amount ...

Embodiment 2

[0041] The process and steps of the present embodiment are described as follows:

[0042] a. Using high-purity 99.99% Al 2 o 3 , high-purity graphite powder, 99% MgO and 99.99% La 2 o 3 or Y 2 o 3 as raw material; with Al 2 o 3 As the matrix material, C, MgO and La 2 o 3 or Y 2 o 3 as doping material; with Al 2 o 3 The weight of the base material is 100 as a measurement basis, where MgO and La 2 o 3 or Y 2 o 3 It is a sintering aid, and C is a thermoluminescent and photoluminescent activator. The doping amount of MgO is 0.05-0.2wt%, La 2 o 3 or Y 2 o 3 The doping amount of C is 0.05-0.2wt%; the doping amount of C is 0.05-0.2wt%;

[0043] b. Al prepared according to the above formula 2 o 3 Stir and mix the base material and each dopant material, and mix and grind the mixture in distilled water for 24 hours;

[0044] c. drying at a temperature of 150°C, then adding a polyvinyl alcohol binder with a concentration of 5wt%, and the addition amount is 5% of t...

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Abstract

The invention relates to a C-doped alpha-Al2O3 transparent ceramic thermoluminescent and photoluminescent material and a preparation method thereof and belongs to the technical field of ceramic material manufacturing techniques. The method adopts high-purity alpha-Al2O3 and carbon powder or graphite as raw materials and adopts MgO and La2O3 or Y2O3 as sintering aids and a solidoid sintering method to prepare the alpha-Al2O3:C transparent ceramic thermoluminescent and photoluminescent material under a condition of a lower temperature. Detection experiments show that the alpha-Al2O3:C transparent ceramic material prepared by the method has an excellent thermoluminescent property and can be used as a measurement material for radiation dose.

Description

technical field [0001] The invention relates to a C-doped α-Al 2 o 3 The invention discloses a transparent ceramic thermoluminescent and optically luminescent material and a preparation method thereof, which belong to the technical field of manufacturing technology of special ceramic materials. Background technique [0002] Thermoluminescence (TL for short) of a material refers to the thermoluminescence of a material after absorbing radiant energy. In the 1950s, Daniels of the University of Wisconsin in the United States used the thermoluminescent properties of materials for the measurement of radiation dose for the first time. The initially used lithium fluoride thermoluminescent material has high sensitivity, but its thermoluminescent performance is not stable. Later, researchers successively developed LiF:Mg, Ti and LiF:Mg, Cu, P with more excellent thermoluminescent properties. At present, lithium fluoride series materials are still the most widely used materials in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/10C09K11/80
Inventor 杨秋红张斌张浩佳陆神洲
Owner 苏州巍迩光电科技有限公司
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