Patent · US Active

Composite ceramic which comprises a conversion phosphor and a material having a negative coefficient of thermal expansion

US9567519B2 · kind B2 · utility

2Cited by

2References

19Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Holger Winkler · Darmstadt, DE
Thomas Juestel · Aachen, DE
Julian Plewa · Munster, DE

Key dates

Filing date	Mar 2, 2013
Grant date	Feb 14, 2017
Priority date	—
Expiry date	Jun 13, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The present invention relates to a composite ceramic which comprises a conversion phosphor and a further material, characterized in that the further material has a negative coefficient of thermal expansion, and to a process for the preparation thereof. Furthermore, the present invention also relates to the use of the composite ceramic according to the invention as emission-converting material, preferably in a white light source, and to a light source, a lighting unit and a display device.

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