EP 2542645 A1 20130109 - CORE-SHELL PHOSPHOR PRODUCED BY HEAT-TREATING A PRECURSOR IN THE PRESENCE OF LITHIUM TETRABORATE
Title (en)
CORE-SHELL PHOSPHOR PRODUCED BY HEAT-TREATING A PRECURSOR IN THE PRESENCE OF LITHIUM TETRABORATE
Title (de)
MITTELS WÄRMEBEHANDLUNG EINES VORLÄUFERS IN GEGENWART VON LITHIUMTETRABORAT HERGESTELLTER KERN-HÜLLE-PHOSPHOR
Title (fr)
LUMINOPHORE DE TYPE COEUR/COQUILLE OBTENU PAR TRAITEMENT THERMIQUE D'UN PRECURSEUR EN PRESENCE DE TETRABORATE DE LITHIUM
Publication
Application
Priority
- FR 1000819 A 20100301
- EP 2011052896 W 20110228
Abstract (en)
[origin: WO2011107422A1] The phosphor of the invention is characterized in that same is capable of being produced by a method in which a precursor including particles having an average diameter of between 1.5 and 15 micrometers is heat-treated under a reducing atmosphere, said particles including a mineral core and a shell containing a composite phosphate of lanthanum and/or cerium, optionally doped with terbium, which covers the mineral core uniformly over a thickness greater than or equal to 300 nm, the heat treatment taking place in the presence of lithium tetraborate (Li2B4O7), as a fluxing agent, in a mass quantity of at most 0.2%, at a temperature of between 1050°C and 1150°C and for a time period of between 2 hours and 4 hours.
IPC 8 full level
C09K 11/77 (2006.01); H01J 61/44 (2006.01)
CPC (source: EP KR US)
C09K 11/02 (2013.01 - EP US); C09K 11/77 (2013.01 - KR); C09K 11/7777 (2013.01 - EP US); H01J 61/44 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2011107422A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
FR 2956864 A1 20110902; FR 2956864 B1 20120330; CA 2791430 A1 20110909; CN 102782090 A 20121114; EP 2542645 A1 20130109; JP 2013521358 A 20130610; KR 101403099 B1 20140603; KR 20120123510 A 20121108; US 2013187093 A1 20130725; WO 2011107422 A1 20110909
DOCDB simple family (application)
FR 1000819 A 20100301; CA 2791430 A 20110228; CN 201180011664 A 20110228; EP 11706539 A 20110228; EP 2011052896 W 20110228; JP 2012555379 A 20110228; KR 20127022836 A 20110228; US 201113582685 A 20110228