Pressure-Molded High-Alumina Ceramic Castables. 3, Effect of Processing Additives on Pressure-Induced Compaction and Properties of Bauxite-Quartz Glass Matrix Systems

摘要

The effect of lignosulfonate (LST) and surface-active substances (SAS) on compaction and properties of bauxite-quartz glass matrix systems is studies. LST added at an optimum concentration to bauxite-based highly concentrated ceramic binding suspensions (HCBS) causes a 2-3 percent decrease in perform porosity. In materials sintered the effect of decreases porosity is more pronounces. In performs molded at 500-700 Mpa no defect due to overpress is observes. The SAS, judged from their efficiency for decreasing porosity, are arranged in ascending order: sodium silicate water silicate water glass, sodium tripolyphosphate, complex organomineral thinner, and FS-20 castament.