C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/124
C09K 11/00 (2006.01) C09K 11/77 (2006.01)
Patent
CA 1081449
ABSTRACT: Luminescent yttrium disilicate, activated by at least one of the rare-earth metals excluding La, Gd and Lu. The disilicate contains 0.5 to 25 mole % Rb and/or Cs and is preferably prepared by the addition of RbF and/or CsF to a starting mixture of oxides of Y and the activator elements. -10-
247134
N.v. Philips Gloeilampenfabrieken
Na
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