公开(公告)号：US11731883B2

公开(公告)日：2023-08-22

申请号：US16965255

申请日：2019-01-31

Applicant: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN

Inventor： Alain Allimant ,  Howard Wallar

IPC: C23C4/10 ,  C01F17/206 ,  C04B35/10 ,  C04B35/48 ,  C04B35/505 ,  C01G27/02

CPC classification number: C01G27/02 ,  C01F17/206 ,  C04B35/10 ,  C04B35/48 ,  C04B35/505 ,  C23C4/10 ,  C01P2002/34 ,  C01P2004/50

Abstract: A powder of melted particles, more than 95% by number of the particles exhibiting a circularity of greater than or equal to 0.85. The powder including more than 99.8% of a rare earth metal oxide and/or of hafnium oxide and/or of an aluminum oxide, as percentage by mass based on the oxides. The powder has a median particle size D50 of less than 15 μm, a 90 percentile of the particle sizes, D90, of less than 30 μm, and a size dispersion index (D90−D10)/D10 of less than 2, and a relative density of greater than 90%. The Dn percentiles of the powder are the particle sizes corresponding to the percentages, by number, of n %, on the cumulative distribution curve of the size of the particles in the powder and the particle sizes are classified by increasing order.