Patent · US Expired

Luminescent material

US6133688A · kind A · utility

0Cited by

2References

11Claims

0Family size

Assignee

U.S. Phillips Corp. · US

Inventors

Thomas Justel · Witten, DE
Carolin Borgmann · Frankfurt, DE
Ferdinand Schuth · Oberursel, DE

Key dates

Filing date	Jun 1, 1998
Grant date	Oct 17, 2000
Priority date	—
Expiry date	Jun 1, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K11/7776
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A luminescent material of general formula EQU Ln.sub.y/3 Na.sub.x-y (Al.sub.x Si.sub.192-x O.sub.384)(MO.sub.3).sub.z wherein 0<x<96, 0<y<96, y<x and z<20, and Ln comprises one or more elements chosen from the group formed by Sc, Y, La and the Lanthanides and wherein M comprises one or more elements chosen from the group formed by Mo, W, V, Nb and Ta. Luminescent materials of this general formula are relatively cheap and are very suitable for use in low pressure mercury discharge lamps of the three band type.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.