Vitreous china, method for preparing the vitreous china, sanitar

Details Vitreous china, method for preparing the vitreous china, sanitar Vitreous china, method for preparing the vitreous china, sanitar

1993-08-03

1994-12-13

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501144, C03C 100, C04B 3324

Patent

active

053729765

ABSTRACT:
A vitreous china comprises, as principal components, 25 to 70% by weight of a glass phase and 75 to 30% by weight of a crystalline phase, the glass phase comprising, as principal chemical components, 4 to 12% by weight of K.sub.2 O+Na.sub.2 O, 50 to 75% by weight of SiO.sub.2 and 17 to 40% by weight of Al.sub.2 O.sub.3 while the total amount of the glass phase is defined to be 100% by weight, and the crystalline phase comprising, as principal mineral components, 10 to 60% by weight of .alpha.-alumina, 0 to 20% by weight of quartz and 2 to 20% by weight of mullite while the total amount of the vitreous china is defined to be 100% by weight. The vitreous china and the method for preparing the same may permit the marked improvement of the mechanical strength of the vitreous china. The mechanical strength may be improved without adversely affecting other physical properties (such as high temperature deformation, resistance to thermal shock and firing temperature). This vitreous china can be applied to sanitary-wares, large-sized pottery plates and various kinds of engineering ceramics. Moreover, the present invention provides a glaze which has excellent compatibility with vitreous china having high alumina contents and which is thus applied to a large-sized product formed from vitreous china having such a high alumina content.

REFERENCES:
patent: 3681102 (1972-08-01), Beall
patent: 4717695 (1988-01-01), Oda
patent: 4843047 (1989-06-01), Oda
O'Bannon, Dictionary of Ceramic Science and Engineering, 1983, p. 86, no month.
Dodd, Dictionary of Ceramics, 1964, p. 87, no month.
Kingery et al, "Introduction to Ceramic", 1976, pp. 106-107, no month.
W. Vogel, "Chemistry of Glass", The American Ceramic Society, 1985, no month.

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