EP 1254080 A1 20021106 - TRANSPARENT GLASS-CERAMICS BASED ON ALPHA- AND BETA-WILLEMITE
Title (en)
TRANSPARENT GLASS-CERAMICS BASED ON ALPHA- AND BETA-WILLEMITE
Title (de)
TRANSPARENTE GLASSKERAMIK AUF DER BASIS VON ALPHA- UND BETAWILLEMIT
Title (fr)
VITROCERAMIQUES TRANSPARENTS A BASE DE WILLEMITE ALPHA- ET BETA
Publication
Application
Priority
- US 0028233 W 20001012
- US 16013899 P 19991018
Abstract (en)
[origin: WO0128943A1] A glass-ceramic which is substantially and desirably totally transparent, and which contains a willemite predominant crystal phase within the ternary Mg2SiO4-Zn2SiO4-Li4SiO4 system. The glass-ceramic is formed from precursor glasses having the following compositions, in weight percent on an oxide basis, of 25-60 SiO2, 4-20 Al2O3, 20-55 ZnO, 0-12 MgO, 0-18 K2O, 0-12 Na2O, 0-30 GeO2, with the condition that SIGMA K2O+ Na2O >/= 5. The glass-ceramic may be doped with up to 1 wt. % Cr2O3 to impart optical activity thereto.
IPC 1-7
IPC 8 full level
C03B 32/02 (2006.01); C03C 10/00 (2006.01); C03C 10/04 (2006.01); C09K 11/64 (2006.01); C09K 11/68 (2006.01); G02B 6/02 (2006.01); H01S 3/06 (2006.01); H01S 3/17 (2006.01)
CPC (source: EP)
C03B 32/02 (2013.01); C03C 10/0036 (2013.01); C09K 11/646 (2013.01); C09K 11/685 (2013.01); G02B 6/0229 (2013.01)
Citation (search report)
See references of WO 0128943A1
Designated contracting state (EPC)
AT BE CH CY DE FR GB IT LI
DOCDB simple family (publication)
WO 0128943 A1 20010426; AU 8016100 A 20010430; CA 2387951 A1 20010426; CN 1184157 C 20050112; CN 1379742 A 20021113; EP 1254080 A1 20021106; JP 2003512281 A 20030402; TW 503225 B 20020921
DOCDB simple family (application)
US 0028233 W 20001012; AU 8016100 A 20001012; CA 2387951 A 20001012; CN 00814337 A 20001012; EP 00970840 A 20001012; JP 2001531736 A 20001012; TW 89122007 A 20001017