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Phosphor and method for producing same

A manufacturing method and phosphor technology, applied in chemical instruments and methods, luminescent materials, inorganic chemistry, etc., can solve problems such as insufficient grain growth, easy residual oxygen, and difficult control

Active Publication Date: 2018-09-28
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production method using an oxide-based raw material is suitable for a small amount of trial production, but if it is intended to produce a large amount of phosphors, it has the following difficulties: it is difficult to control the residual amount of oxygen derived from the oxide-based raw material, and a relatively large amount of oxygen is likely to remain. oxygen, and thus the grain growth tends to become insufficient

Method used

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  • Phosphor and method for producing same
  • Phosphor and method for producing same
  • Phosphor and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A boat made of quartz glass was filled with the phosphor of Comparative Example 1, and placed in a quartz reaction tube. It was arranged in a firing furnace in this state, and fired at a temperature of 1000° C. for 3 hours in a hydrogen sulfide atmosphere, thereby producing the phosphor of Example 1. The obtained phosphor was used for the characteristic evaluation mentioned later.

Embodiment 2

[0048] A boat made of quartz glass was filled with the phosphor of Comparative Example 2, and placed in a quartz reaction tube. It was placed in a firing furnace in this state, and fired at a temperature of 1000° C. for 3 hours in a hydrogen sulfide atmosphere to produce the phosphor of Example 2. The obtained phosphor was used for the characteristic evaluation mentioned later.

Embodiment 3

[0050] A boat made of quartz glass was filled with the phosphor of Comparative Example 2, and placed in a quartz reaction tube. It was arranged in a firing furnace in this state, and fired at a temperature of 1100° C. for 3 hours in a hydrogen sulfide atmosphere, thereby producing the phosphor of Example 3. The obtained phosphor was used for the characteristic evaluation mentioned later.

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Abstract

A phosphor of the embodiment has a composition represented by the compositional formula: Na<x>RM<y>S<z>O (in the formula, R indicates at least one element selected from the group consisting of Y, La, Gd, and Lu, M indicates at least one element selected from the group consisting of Bi, Ce, Eu, and Pr, x is an atomic ratio that satisfies 0.93<x<1.07, y is an atomic ratio that satisfies 0.00002<y<0.01, z is an atomic ratio that satisfies 1.9<z<2.1, and a is an atomic ratio that satisfies 0.001<a<0.05.

Description

technical field [0001] Embodiments of the present invention relate to phosphors and methods of manufacturing the same. Background technique [0002] NaGdS activated by Bi, Ce, Eu, etc. is known as a scintillator material for an X-ray detector (a phosphor material that converts X-rays into visible light) or a red phosphor or a blue phosphor for a display device. 2 phosphor (sodium rare earth sulfide phosphor). One method of producing such a phosphor includes a method of reacting sulfides of various metal elements. The method of using sulfide has the advantages of less incorporation of oxygen as an impurity and easy production. However, in general, it is difficult to obtain a high-purity sulfide raw material, and it is difficult to increase the emission intensity due to the incorporation of impurities. [0003] NaGdS can also be produced by using an oxide-based raw material that is relatively pure and easy to obtain, and firing it in hydrogen sulfide to sulfide it. 2 Phosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/84C09K11/08
CPCC01P2002/50C01P2002/54C01P2006/80C09K11/7701C09K11/7771C09K11/7789C01F17/30C09K11/7767C09K11/7784
Inventor 碓井大地竹村博文松田直寿
Owner KK TOSHIBA