发明名称 |
Electroluminescent phosphor with extended life and method of making same |
摘要 |
An electroluminescent phosphor containing an effective amount of bismuth to increase the half-life of the phosphor compared to the half-life of the phosphor without the bismuth. The phosphor is produced by the method comprising the steps of preparing the electroluminescent phosphor; adding granular, elemental bismuth to the bottom of a quartz reaction vessel; covering the bismuth with a layer of quartz wool; placing the phosphor on top of the quartz wool; evacuating the reaction vessel to about 750-760 mm Hg and sealing the vessel; and heating the vessel to between about 500 to 700 DEG C. for about 24 to 72 hours.
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申请公布号 |
US6113808(A) |
申请公布日期 |
2000.09.05 |
申请号 |
US19980215481 |
申请日期 |
1998.12.18 |
申请人 |
OSRAM SYLVANIA INC. |
发明人 |
GINGERICH, RICHARD G. W.;VANDERPOOL, CLARENCE D. |
分类号 |
C09K11/08;C09K11/00;C09K11/56;C09K11/61;C09K11/74;H05B33/12;H05B33/14;(IPC1-7):C09K11/54 |
主分类号 |
C09K11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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