C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 8/04 (2006.01)
Patent
CA 2476739
The present invention provides partially crystallizing lead-free and cadmium- free glass enamel composition that fuse at low temperatures. Glass enamels compositions according to the present invention form predominantly bismuth titanate and optionally zincs titanate crystals upon firing. Preferably, glass enamel compositions according to the invention include a glass component that includes by weight from about 11 % to about 52% Si02, from 10.2% to about 40% TiO2, from about 5% to about 75% Bi2O3, up to about 8% B203, up to about 14% BaO + SrO, and up to about 45% by weight ZnO, where the sum of Bi2O3 and ZnO comprises from about 30% to about 85% of the glass component by weight.
La présente invention concerne une composition d'émail vitrifié sans cadmium et sans plomb à cristallisation partielle qui fond à basses températures. Les compositions d'émail vitrifié de cette invention forment de manière prédominante un titanate de bismuth et éventuellement des cristaux de titanate de zinc lors de la cuisson. De préférence, ces composition d'émail vitrifié comprennent un composant de verre qui inclut en masse d'environ 11 % à environ 52 % de SiO¿2?, de 10,2 % à environ 40 % de TiO¿2?, d'environ 5 % à environ 75 % de Bi¿2?O¿3?, jusqu'à environ 8 % de B¿2?O¿3?, jusqu'à environ 14 % de BaO + SrO, et jusqu'à environ 45 % en masse de ZnO, la somme de Bi¿2?O¿3? et de ZnO comprenant d'environ 30 % à environ 85 % du composant de verre en masse.
Anquetil Jerome
Blonski Robert P.
Joyce Ivan H.
Korn George C.
Sridharan Srinivasan
Ferro Corporation
Moffat & Co.
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