C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/484 (2006.01)
Patent
CA 2709339
Fused product in the form of a particle having a sphericity greater than or equal to 0.6, which has the following chemical composition, in weight percent based on the oxides and for a total of 100%: (ZrO2 + HfO2): complement to 100%, 6% < CeO2 < 31%, 0.8% < Y2O3 < 8.5%, 0% < Al2O3 < 30%, 0% < SiO2 < 17%, 0 < TiO2 < 8.5%, 0 < MgO < 6%, and other oxides < 1%, provided that, by denoting by "C" the weight ratio CeO2/(ZrO2 + HfO2) and by "Y" the weight ratio Y2O3/(ZrO2 + HfO2), 0 < C < 0.6 and Y > 0.02 and Min(63.095.Y2 - 11.214.Y + 0.4962; 0.25) < C (I) and C = 250.Y2 - 49.1.Y + 2.6 (II).
Produit fondu sous la forme d'une particule présentant une sphéricité supérieure on égale à 0,6, présentant la composition chimique suivante, en pourcentages en masse sur la base des oxydes et pour un total de 100 %: (ZrO2 - HfO2): complément à 100 %, 6% < CeO2 < 31 %, 0,8 % < Y2O3 < 8,5 %, 0% < AI2O3 < 30 %, 0%< SiO2 < 17 %, 0 < TiO2 < 8,5 % 0 < MgO < 6 %, et autres oxydes < 1%, pourvu que, en désignant par C le rapport en masse CeO2/(ZrO2 + HfO2) et par Y le rapport en masse Y2O3/(ZrO2 + HFO2), 0 < C < 0,6 et Y > 0,02 et Min(63,095.Y2 - 11,214.Y+ 0,4962; 0,25) < C(I) et C <= 250.Y2 - 49,1.Y + 2,6 (II).
Boussant-Roux Yves
Hanus Eric
Nonnet Emmanuel
Robic
Saint-Gobain Centre de Recherches Et D'etudes Europeen
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