发明名称 |
Luminescent lanthanum gallate activated by trivalent thulium, luminescent screen provided with such a gallate and cathode ray tube provided with such a screen. |
摘要 |
<p>Luminescent lanthanum gallate having the perovskite structure and activated by trivalent Tm. The gallate comprises aluminium and is defined by the formula La1-xTmxGa1-yAlyO3 in which up to 20 mol.% of the lanthanum may be replaced by yttrium, gadolinium, lutetium and/or scandium and in which 10<-><4> </= x </= 0.05 and 0.20 </= y </= 0.80. Upon cathode ray excitation the gallate has the narrow blue-line emission of Tm<3><+> and is particularly suitable for use in the luminescent screen of high-load cathode ray tubes, for example projection television tubes.</p> |
申请公布号 |
EP0276519(A1) |
申请公布日期 |
1988.08.03 |
申请号 |
EP19870202648 |
申请日期 |
1987.12.30 |
申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
MUTSAERS, CORNELIS ADRIANUS H. A.;DE LEEUW, DAGOBERT MICHEL |
分类号 |
C09K11/77;C09K11/80;H01J29/20;(IPC1-7):C09K11/80 |
主分类号 |
C09K11/77 |
代理机构 |
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代理人 |
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地址 |
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