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Low‐Temperature Synthesis of CaZrO 3 Powder from Molten Salts
Author(s) -
Li Zushu,
Lee William Edward,
Zhang Shaowei
Publication year - 2007
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.1551-2916.2006.01383.x
Subject(s) - zirconate , calcium , distilled water , materials science , cubic zirconia , sodium , phase (matter) , calcium carbonate , mineralogy , chemical engineering , inorganic chemistry , chemistry , metallurgy , ceramic , organic chemistry , composite material , chromatography , engineering , titanate
Calcium zirconate (CaZrO 3 ) powder was synthesized using calcium chloride (CaCl 2 ), sodium carbonate (Na 2 CO 3 ), and zirconia (ZrO 2 ) powders. On heating, CaCl 2 reacted with Na 2 CO 3 to form NaCl and CaCO 3 . NaCl–Na 2 CO 3 molten salts provided a liquid reaction medium for the formation of CaZrO 3 from in situ ‐formed CaCO 3 (or CaO) and ZrO 2 . CaZrO 3 started to form at about 700°C, increasing in amount with increasing temperature and reaction time, with a concomitant decrease in CaCO 3 (or CaO) and ZrO 2 contents. After washing with hot‐distilled water, the samples heated for 5 h at 1050°C were single‐phase CaZrO 3 with 0.5–1.0 μm grain size.