Patent ID: 6605557
Filing Date: 2003-08-12
Classification: C04B

Abstract:
Ceramic media comprising less than 0.25% by weight of alkali metal, measured as the oxide, formed from a fired mixture comprises 10-98% by weight of a clay having an alumina content of at least 36% by weight; from 2 to 90% by weight of a talc containing at least 95% by weight of magnesium silicate as, determined by X-ray diffraction analysis; and from 0-10% by weight of a dolomitic limestone containing 60-90% by weight of calcium carbonate and 10-40% by weight of magnesium carbonate and 10% to 40% by weight of magnesium carbonate and less than 10% of non-carbonate impurities, the ceramic media having a water absorption of 7.6%-12.6%.