Electro-ceramic bodies based on slag and active alumina phases

The influence of slag, alpha- and gamma -Al2O3 in ceramic compositions on d ensification, crystalline phases, microstructure, thermal, mechanical and e lectrical properties was investigated. The degree of fineness of slag and t ype of alumina phase played a role in microstructure developed that affecte d on properties of the vitrified bodies. The bodies containing 20 mass % fi ne slag (75,3 % < 30...2 <mu>m) with alpha -Al2O3 (alpha -AS(20) mix) showe d a remarkable reduction of firing temperature with maximum MOR of 59,37 MP a. The main phases recorded were anorthite, corundum, mullite with traces o f cristobalite and quartz relics. The relevant of electroceramic bodies pro duced exhibited high values for both thermal shock resistance and volume re sistivity (3,6 x 10(12) to 0,58x10(13) Omega /mm) as well as reasonable die lectric strength.