公开(公告)号：EP1047749A1

公开(公告)日：2000-11-02

申请号：EP99944449.0

申请日：1999-08-18

申请人： Koninklijke Philips Electronics N.V. ,  Philips Corporate Intellectual Property GmbH

发明人： JÜSTEL, Thomas ,  NIKOL, Hans ,  MAYR, Walter ,  RONDA, Cornelis, R.

IPC分类号： C09K11/02 ,  H01J61/44 ,  H01J61/46 ,  C09K11/66

CPC分类号： H01J61/44 ,  C09K11/025 ,  C09K11/666 ,  H01J61/46

摘要： The invention relates to a method of coating a luminescent material with a layer of a metalpolyphosphate wherein the metal is chosen from the group formed by Ca, Sr and Ba. According to the invention, the luminescent material is dispersed in a watery solution of sodium polyphosphate, a watery solution of nitrate of the metal M is added, after which the luminescent material is separated, dried and fired.