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Phase state of the system HfO/sub 2/--Eu/sub 2/O/sub 3/ in the HfO/sub 2/-rich region

Journal Article · · Inorg. Mater. (USSR) (Engl. Transl.); (United States)
OSTI ID:7361647
The phase composition of ZrO/sub 2/--Eu/sub 2/O/sub 3/ and HfO/sub 2/--Eu/sub 2/O/sub 3/ systems were investigated at room temperature and at high temperatures. It was found that for low rare earth oxide contents the fluorite solid solution formation mechanism is not the same in systems based on ZrO/sub 2/ or HfO/sub 2/: In systems based on HfO/sub 2/, formation of the tetragonal phase is not observed up to 1500/sup 0/C. In the system HfO/sub 2/--Eu/sub 2/O/sub 3/, for a mixture with 30 mole percent Eu/sub 2/O/sub 3/ formation of a second cubic phase, apparently a compound of the pyrochlore type--Eu/sub 2/Hf/sub 2/O/sub 7/ was established. (JRD)
OSTI ID:
7361647
Journal Information:
Inorg. Mater. (USSR) (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (USSR) (Engl. Transl.); (United States) Vol. 11:10; ISSN INOMA
Country of Publication:
United States
Language:
English