METHODS FOR PRODUCING LOW DENSITY PRODUCTS

摘要

The method of preparing a low-density material and precursor for forming a l ow- density material. An aqueous mixture of inorganic primary component and a blowing agent is formed, the mixture is dried and optionally ground to form an expandable precursor. Such a precursor is then fired with activation of the blowing agent being controlled such that it is activated within a predetermined optimal temperature range. Control of the blowing agent can be accomplished via a variety of means including appropriate distribution throughout the precursor, addition of a control agent into the precursor, or modification of the firing conditions i.e. oxygen deficient or fuel rich environment, plasma heating etc.