Leuchtstoffpartikel und Herstellungsverfahren

Details

Veröffentlichungs-Nr.

EP2474590

Aktenzeichen

EP12150171

Anmeldetag

4. Januar 2012

Veröffentlichung

12. November 2014

Erteilung

12. November 2014

Rechtsraum

EP

IPC

C09K11/80

Abstract

Phosphor particles are provided in the form of spherical polycrystalline secondary particles consisting of a multiplicity of primary particles, including a garnet phase having the composition: (A x ByC z ) 3 C 5 O 12 wherein A is Y, Gd, and/or Lu, B is Ce, Nd, and/or Tb, C is Al and/or Ga, and x, y and z are in the range: 0.002 < y ¤ 0.2, 0 < z ¤ 2/3, and x+y+z=1. The phosphor particles are prepared by granulating powder oxides containing one or more of the elements A, B, and C, melting the granules in a plasma and solidifying outside the plasma, and heat treating the resulting particles in a non-oxidizing atmosphere at a temperature of higher than 800° C to 1,700° C.

Anmelder

Firma

Shin-Etsu Chemical Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete