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THE EQUILIBRIUM DIAGRAMS OF THE SYSTEMS ZIRCONIUM OXIDE-RARE EARTH OXIDES (in French)

Journal Article · · Bull. soc. chim. France
OSTI ID:4033174
The equilibrium diagrams of ZrO/sub 2/-M/sub 2/O/sub 3/ (M = Y, La, Nd, Sm, Gd, Dy, and Yb) were studied by various techniques, particularly radiocrystalographic analysis and dilatometry. The primary solid solutions containing from 1 to 10 mol% of the rare earth oxide were prepared by the coprecipitation method in the amorphous state. A quadratic phase with a deformed fluorine type structure and a cubic phase with fluorine structure were detected. The only intermediate phase present was one of the pyrochlore type with composition near M/sub 2/Zr/sub 2/O/sub 7/. The equilibrium diagrams showed a considerable range of solid solutions showing the quadraticcubic transition for the systems ZrO/sub 2/-Yb/sub 2/O/sub 3/ and ZrO/sub 2/Gd/sub 2/O/sub 3/. A progressive augmentation of the extent of the biphase region and of the stability of the pyrochlore phase was noticed when the ion radius of the rare earth increases. (J.S.R.)
Research Organization:
C.N.R.S., Paris
NSA Number:
NSA-15-016088
OSTI ID:
4033174
Journal Information:
Bull. soc. chim. France, Journal Name: Bull. soc. chim. France Vol. Vol: No. 1
Country of Publication:
Country unknown/Code not available
Language:
French