Low thermal expansion ceramics contains a cordierite crystal phase, wherein a phase of a crystalline compound containing at least one element selected from the group consisting of an alkaline earth element other than Mg, a rare earth element, Ga and In, is precipitated in the grain boundaries of said...http://www.google.fr/patents/US6265334?utm_source=gb-gplus-shareBrevet US6265334 - Ceramic sintered product and process for producing the same
Ceramic sintered product and process for producing the same
