POROUS CERAMIC MATERIALS FOR INVESTMENT CASTING

摘要

PROBLEM TO BE SOLVED: To provide methods and compositions for forming porous ceramic articles.SOLUTION: The method comprises: forming a composition including liquid siloxanes, ceramic particles, a catalyst and a pore former; shaping the composition; curing the composition to form a green body; volatilizing the pore former before or after curing the composition; and firing the green body. The pore former is a silicon-bearing agent with an average molecular mass under 1300 g/mol, or a molecule with a molecular mass under 1000 g/mol and a freezing point between -40°C and 25°C that is soluble in the liquid. The composition comprises liquid siloxanes, ceramic particles, a catalyst, and a pore former, and the composition is an agent with an average molecular mass under 1300 g/mol or a molecule with a molecular mass under 1000 g/mol and a freezing point between -40°C and 25°C that is soluble in the liquid.SELECTED DRAWING: None