发明名称 |
PHOSPHATE DE CERIUM ET/OU DE TERBIUM, EVENTUELLEMENT AVEC DU LANTHANE, LUMINOPHORE ISSU DE CE PHOSPHATE ET PROCEDES DE PREPARATION DE CEUX-CI |
摘要 |
<p>A rare earth (Ln) phosphate is described, wherein Ln is either: (1) at least one rare earth selected from cerium and terbium, or (2) lanthanum in combination with at least one of the two above-mentioned rare earths, and wherein the phosphate has a crystalline structure of the monazite type with a potassium content of at most 6000 ppm. The phosphate can be obtained by the precipitation of a rare earth chloride at a constant pH lower than 2, by calcination at a temperature of at least 700° C. and by redispersion in hot water. A phosphor obtained by calcination of said phosphate at at least 1000° C. is also described.</p> |
申请公布号 |
FR2938524(B1) |
申请公布日期 |
2011.01.07 |
申请号 |
FR20080006504 |
申请日期 |
2008.11.20 |
申请人 |
RHODIA OPERATIONS |
发明人 |
AURISSERGUES FRANCK;BERNARD JOEL;BUISSETTE VALERIE;LE MERCIER THIERRY |
分类号 |
C01B25/45;C09K11/08;C09K11/77 |
主分类号 |
C01B25/45 |
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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