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Phase Equilibria of the Bismuth Oxide–Calcium Oxide–Copper Oxide System in Oxygen at 1 atm
Author(s) -
Tsang ChiFo,
Meen James K.,
Elthon Don
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03009.x
Subject(s) - oxide , copper oxide , bismuth , calcium oxide , materials science , solid solution , phase (matter) , inorganic chemistry , analytical chemistry (journal) , chemistry , metallurgy , organic chemistry , chromatography
Phase equilibria in the bismuth oxide‐calcium oxide‐copper oxide system have been determined at 1 atm pressure in oxygen over the temperature range of 750°–1000°C. The phases found to be stable at 750°C are Bi 2 CuO 4 , CuO, Ca 2 CuO 3 , CaO, Bi 2 Ca 2 O 5 , Bi 6 Ca 4 O 13 , Bi 14 Ca 5 O 26 , a rhombohedral Bi‐Ca oxide solid solution (Rh ss ), and a face‐centered cubic Bi‐Ca oxide solid solution (Fcc ss ) that includes Bi 2 O 3 . At 800°C, the stable phases are Bi 2 CuO 4 , CuO, Ca 2 CuO 3 , CaO, Bi 2 Ca 2 O 5 , Bi 6 Ca 4 O 13 , a hexagonal Bi‐Ca oxide solid solution (δ ss ), Rh ss , Fcc ss , and liquid. The phases found to be stable at 850°C are CuO, Ca 2 CuO 3 , CaO, Bi 2 Ca 2 O 5 , Bi 6 Ca 4 O 13 , Fcc ss , and liquid. The phases found to be stable at 900°C are CuO, Ca 2 CuO 3 , CaO, Bi 2 Ca 2 O 5 , a body‐centered cubic Bi‐Ca oxide solid solution (Bccss), and liquid. The stable phases at 950°C are CuO, Ca 2 CuO 3 , CaO, and liquid. At 1000°C, the stable phases are CuO, Ca 3 Cu 7 O 10 , Ca 2 CuO 3 , CaO, and liquid.