Gm Global Technolgoy Operations, Inc.

Arthur V Somers

Morris Berg

Archie A Shukle

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 Na.sub.2 O and K.sub.2 O 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.

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Flushing, MI, United States of America

Arthur V Somers