Patent ID: 8372769

Claim:
Yttria-based refractory composition obtainable by a method comprising: (a) mechanically mixing particles of an yttria-based ceramic material and a fluorine-containing dopant other than an an alkali metal fluoride, wherein said yttria-based ceramic material comprises Y/Al/Zr oxide or Y/Zr oxide, from 50 wt.% up to less than 100 wt.% Y 2 O 3 , 0-50 wt.% Al 2 O 3 , and more than 0% and up to 50 wt.% ZrO 2 , and (b) heating the resulting mixture to a temperature within a range of 300-800° C. to effect fluorine-doping of said yttria-based ceramic material and yield an yttria-based ceramic material doped with fluorine.