Patent ID: 9371253
Filing Date: 2016-06-21
CPC Classification: B32B,C04B,C23C,F01D,Y02T,Y10T

Claim Text:
1. A high purity yttria or ytterbia stabilized zirconia powder comprising a blend of two or more high purity yttria or ytterbia stabilized zirconia powders; wherein the blend comprises from about 55 to about 80 volume percent of a first high purity yttria or ytterbia partially stabilized zirconia powder having from about 0 to about 0.15 weight percent impurity oxides, from about 0 to about 2 weight percent hafnium oxide (hafnia), from about 6 to about 8 weight percent yttrium oxide (yttria) or from about 10 to about 14 weight percent ytterbium oxide (ytterbia), and the balance zirconium oxide (zirconia), and from about 20 to about 45 volume percent of a second high purity yttria or ytterbia fully stabilized zirconia powder having from about 0 to about 0.15 weight percent impurity oxides, from about 0 to about 2 weight percent hafnium oxide (hafnia), from about 16 to about 22 weight percent yttrium oxide (yttria) or from about 25 to about 33 weight percent ytterbium oxide (ytterbia), and the balance zirconium oxide (zirconia).