Asahi Glass Company, Limited

Hiroji Sakemi

Takuro Ono

Tomohiro Morishita

Hideji Numata

A fired ceramic having dense and low thermal expansion characteristics comprises 0.3 to 8 wt. % of at least one of rare earth oxides and has a thermal expansion coefficient of less than 0.3% and a porosity of less than 10%. The fired ceramic having dense and low thermal expansion characteristics comprises a main component of cordierite, lithium aluminosilicates or aluminum titanate. The rare earth oxide is preferably Y.sub.2 O.sub.3 and can be CeO.sub.2 or La.sub.2 O.sub.3.

Growing community of inventors

Yokohama, Japan

Hiroji Sakemi