Patent · US Active

Phosphor based on a lanthanum cerium terbium phosphate with stabilized brightness, preparation process and use in a luminescent device

US9796924B2 · kind B2 · utility

0Cited by

5References

18Claims

0Family size

Assignee

RHODIA OPERATIONS · FR

Inventors

Valérie Buissette · Paris, FR
Thierry Le-Mercier · Rosny-sous-Bois, FR

Key dates

Filing date	Aug 21, 2012
Grant date	Oct 24, 2017
Priority date	—
Expiry date	Jul 9, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2982
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The phosphor of the invention is based on a lanthunum cerium terbium phosphate, and it is characterized in that the phosphate consists of particles having a mean size of at most 4 μm, in that it has a lithium content of at most 30 ppm, a boton content of at most 30 ppm and in that it has a variation of brightness between the brightness measured on the phosphor at 25° C. and that measured on the same phosphor at 200° C. of at most 4%.

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