Crystallized glass article and a method for producing the same

C - Chemistry – Metallurgy – 03 – C

Patent

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C03C 17/04 (2006.01) C03B 19/06 (2006.01) C03B 19/08 (2006.01) C03B 32/02 (2006.01) C03C 10/00 (2006.01) C03C 11/00 (2006.01)

Patent

CA 1077273

ABSTRACT OF THE DISCLOSURE A crystallized glass article formed of discrete small bodies of crystallizable glass fusion-bonded together at their interfaces is characterized in that a first layer extending from the article surface to a predetermined depth is non-porous, a predetermined thickness of second layer connected to and beneath the first layer being porous. Each of the small bodies in the first layer has needle-like .beta.-wollastonite crystals extending from the surface of the body to the interior thereof in a direction perpendicular to the surface of the body. Accordingly the article is characterized by a surface pattern defined by small bodies due to the differences of orientation of needle-like .beta.-wollastonite crystals and by a reduced specific gravity.

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