Patent ID: 8394732
Filing Date: 2013-03-12
Classification: C03C,C04B

Abstract:
1. A glass-ceramic body prepared from all natural raw materials by a process comprising: a) combining the natural raw materials white sand, kaolin and magnesite in relative amounts suitable to provide, upon subsequent homogenization and heat treatment, a mixture of oxides comprising from about 50 wt % to 60 wt % of SiO b) melting the combination of natural raw materials at a temperature of from about 1500° C. to 1550° C. to form glass material and subsequently quenching said glass material; c) crushing said quenched glass material to frit having a median particle diameter of no greater than about 65 microns; d) consolidating the crushed glass frit into a body; e) sintering said body at a temperature of from about 1000° C. to 1375° C. for a sufficient time to devitrify at least a portion of the glass into a polycrystalline material; and f) cooling to provide a sintered glass-ceramic body comprising a polycrystalline material which is primarily cordierite.