Alumina fibers which incorporate hafnia and optionally zirconia plus a fourth oxide exhibit surprising grain refinement on sintering, and thereafter excellent retention of strength after exposure to high temperatures.
申请公布号
DE3832314(A1)
申请公布日期
1990.02.08
申请号
DE19883832314
申请日期
1988.09.23
申请人
E.I. DU PONT DE NEMOURS AND CO., WILMINGTON, DEL., US
