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Copper-doped yttrium aluminate crystal for thermoluminescence and photoluminescence and preparation method thereof

A technology of photoluminescence and thermoluminescence, used in chemical instruments and methods, crystal growth, single crystal growth, etc.

Active Publication Date: 2010-09-15
杭州光学精密机械研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, there are always some new materials appearing at every solid-state dosimetry conference. However, due to the high requirements for the practical application of thermoluminescent materials, thermoluminescent and optical-luminescent materials that can fully possess all the advantages of dosimeters have not been accepted so far. It was found that most materials have some of these advantages

Method used

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  • Copper-doped yttrium aluminate crystal for thermoluminescence and photoluminescence and preparation method thereof
  • Copper-doped yttrium aluminate crystal for thermoluminescence and photoluminescence and preparation method thereof
  • Copper-doped yttrium aluminate crystal for thermoluminescence and photoluminescence and preparation method thereof

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Experimental program
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Embodiment 1

[0024] Firstly, each high-purity oxide powder is properly pre-dried in the air to remove adsorbed water, and the burning temperature is 1000°C. Then Al 2 o 3 (5N), Y 2 o 3 (5N) and CuO(3N) raw materials are weighed and compounded according to the molar ratio equal to 1:0.995:0.01. After mixing evenly, press it into a block on a hydraulic press, put it in an iridium crucible, and use the pulling method to grow the crystal. The seed crystal is a pure YAP single crystal rod in the direction (longest axis), and the crystal is grown in a high-purity Ar atmosphere. conduct. The pulling speed of the crystal is 1.5mm / h, the rotation speed is 18rpm, and the growth of the convex interface of the crystal is controlled. All crystal growth is carried out through furnace loading→vacuumizing→argon filling→heating material→baking seed→planting→necking→ Shouldering→equal diameter growth→lifting and cooling. The whole growth cycle is about 5 days. The thermoluminescent and optical lumine...

Embodiment 2

[0028] Firstly, each high-purity oxide powder is properly pre-dried in the air to remove adsorbed water, and the burning temperature is 1000°C. Then Al 2 o 3 (5N), Y 2 o 3(5N) and CuO(3N) raw materials are weighed and compounded according to the molar ratio equal to 1:0.997:0.006. After mixing evenly, press it into a block on a hydraulic press, put it in an iridium crucible, and use the pulling method to grow the crystal. The seed crystal is a pure YAP single crystal rod in the direction (longest axis), and the crystal is grown in a high-purity Ar atmosphere. conduct. The pulling speed was 1.2 mm / h, and the rotation speed was 15 rpm.

Embodiment 3

[0030] Firstly, each high-purity oxide powder is properly pre-dried in the air to remove adsorbed water, and the burning temperature is 1000°C. Then Al 2 o 3 (5N), Y 2 o 3 (5N) and CuO(3N) raw materials are weighed and compounded according to the molar ratio equal to 1:0.996:0.008. After mixing evenly, press it into a block on a hydraulic press, put it in an iridium crucible, and use the pulling method to grow the crystal. The seed crystal is a pure YAP single crystal rod in the direction (longest axis), and the crystal is grown in a high-purity Ar atmosphere. conduct. The pulling speed was 2 mm / h, and the rotation speed was 18 rpm.

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Abstract

The invention discloses a copper-doped yttrium aluminate crystal for thermoluminescence and photoluminescence and a preparation method thereof. The copper-doped yttrium aluminate crystal has a chemical formula of Y(1-x):AlO3:Cux, wherein x=0.001-0.1, x is a molar ratio of doped ions Cu<2+> to atoms Y. The copper-doped yttrium aluminate crystal grows by adopting a melt blending method can realize the thermoluminescence or the photoluminescence after absorbing radiant energy of high-energy rays, has favorable dose linear response and is a luminescence material with better performance for a radiation dosemeter.

Description

technical field [0001] The invention relates to thermoluminescence and optical luminescence, in particular to a copper-doped yttrium aluminate crystal (hereinafter referred to as YAP:Cu) for thermoluminescence and optical luminescence and a preparation method thereof. Background technique [0002] In the late 1940s and early 1950s thermoluminescence had shown increasing application prospects. In the 1950s, F.Daniels of the University of Wisconsin in the United States first proposed that thermoluminescence could be used as a method of radiation dosimetry, and used the thermoluminescence properties of LiF to monitor the radiation dose of atomic bomb fields and treat cancer patients with radioisotopes. Internal radiation dosimetry. Compared with thermoluminescent dosimetry, the technology of optical luminescence for radiation field dosimetry started relatively late, mainly due to the limitation of excitation light source and dosimetry materials. In 1988, Aitken and Smith deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/20C30B15/00C30B11/00
Inventor 陈建玉赵广军董勤丁雨憧王鑫
Owner 杭州光学精密机械研究所
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