(Bi,Pb)SrCaCuO precursor material for the oxide powder in tube m

.beta.-quartz-based glass-ceramics

.beta.-silicon nitride sintered body

.theta.-alumina powder, preparation thereof and magnetic recordi

0'-Phase sialon ceramic product and a method of forming dense ce

A1N sintered body containing a rare earth aluminum oxynitride an

Ablation resistant zirconium and hafnium ceramics

Ablative-resistant dielectric ceramic articles

Abrasion resistant glass

Abrasion resistant glass

Abrasion resistant refractory composition

Abrasion resistant refractory composition

Abrasive composition

Abrasive composition

Abrasive grits formed by ceramic impregnation method of making t

Abrasive grits formed of ceramic, impregnation method of making

Acid-soluble glass composition for making flexible fiber optic b

Acid-soluble glass for making flexible optical fiber bundle

Acidproof, hydrolysis-resistant optical and ophathalmic glass of

Acidproof, hydrolysis-resistant optical and ophthalmic glass of