Glass-ceramics process for their preparation and use

Details Glass-ceramics process for their preparation and use Glass-ceramics process for their preparation and use

2005-05-24

2005-05-24

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

C501S010000, C501S016000, C501S017000, C501S021000, C501S026000, C106S483000, C106S489000

Reexamination Certificate

active

06897171

ABSTRACT:
The present invention refers to glass-ceramics consisting of the mixtures (I): ZrO2—SiO2—MeIIO, or (II) SiO2—MeIIIO2—MeIIO, wherein: MeIIis chosen in the group consisting of: Ca, Ba, Mg, Zn or mixture thereof; MeIIIis chosen in the group consisting of Al, B or mixtures thereof; each of the above said constituents being present in determined quantities; the invention refers also to a process for preparing the glass-ceramics above defined; porcelain stonewares and glazes containing them and their use for preparing ceramic items.

REFERENCES:
patent: 4285731 (1981-08-01), Nigrin
patent: 4687749 (1987-08-01), Beall
patent: 5246889 (1993-09-01), Kasuga et al.
patent: 5925180 (1999-07-01), Frank et al.
patent: 62072539 (1987-04-01), None

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