CORDIERITE REFRACTORY COMPOSITIONS AND METHOD OF FORMING SAME

摘要

CORDIERITE REPRACTORY COMPOSITIONS AND METHOD OF FORMING SAME Cordierite refractory compositions made from a mixture of talc, clay, calcined kyanite, alumina and water, the composition being such as to result on firing in a body having cordierite as the major crystalline phase and mullite as the minor crystalline phase and wherein the amount of Na2O and K2O is not in excess of about 0.14% by weight of the batch dry materials, such compositions being suitable for making a catalyst substrate or support in the form of an extruded multi-tubular refractory body as well as other ceramic bodies such as turbine engine components, heat exchanger cores and furnace ware which have a requirement for high resistance to heat shock and low thermal expansion characteristics.