发明名称 |
Method and apparatus for producing moisture insensitive electroluminescent phosphor |
摘要 |
<p>A phosphor particle has thereon a moisture resistant treatment of a metallic nitride. By moisture resistant is meant a condition allowing the phosphor particle to function in a humid atmosphere for a significantly longer period of time than an untreated particle. The method of making such phosphors comprises the steps of introducing an inert gas into a reaction vessel; charging phosphor particles into the reaction vessel; heating the reaction vessel to a reaction temperature; introducing a nitride coating precursor into the reaction vessel in a manner to avoid restrictive reactions; introducing a co-reactant into the reaction vessel; and maintaining the inert gas flow, co-reactant flow and precursor supply for a time sufficient to moisture-proof the phosphor particles. The nitride treated phosphor particles produced by this method, which can include the deposition of a nitride coating on the particles, have excellent efficacy ratings and strong luminance values in lamps after 100 hours use in high humidity (i.e., >95%). By avoiding restrictive reactions the method and apparatus can be used to manufacture commercial quantities of coated phosphors. <IMAGE></p> |
申请公布号 |
EP1088874(A1) |
申请公布日期 |
2001.04.04 |
申请号 |
EP20000121150 |
申请日期 |
2000.09.28 |
申请人 |
OSRAM SYLVANIA INC. |
发明人 |
GINGERICH, RICHARD G. W.;FAN, CHEN-WEN |
分类号 |
H05B33/10;B01J8/18;C09K11/02;C09K11/08;C09K11/56;C23C16/34;C23C16/442;H05B33/14;(IPC1-7):C09K11/02 |
主分类号 |
H05B33/10 |
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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