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Molten Salt Synthesis of Magnesium Aluminate (MgAl 2 O 4 ) Spinel Powder
Author(s) -
Zhang Shaowei,
Jayaseelan Daniel Doni,
Bhattacharya Goutam,
Lee William Edward
Publication year - 2006
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.1551-2916.2006.00932.x
Subject(s) - spinel , molten salt , raw material , magnesium , aluminate , salt (chemistry) , materials science , inorganic chemistry , chemical engineering , mineralogy , chemistry , nuclear chemistry , metallurgy , organic chemistry , cement , engineering
MgAl 2 O 4 (MA) spinel powder was synthesized by heating an equimolar composition of MgO and Al 2 O 3 in LiCl, KCl, or NaCl. The synthesis temperature can be decreased from >1300°C (required by the conventional solid–solid reaction process) to ∼1100°C in LiCl, or to ∼1150°C in KCl or NaCl. The molten salt synthesized MA powder was pseudomorphic and retained, to a large extent, the size and morphology of the original Al 2 O 3 raw material, indicating that a “template formation mechanism” plays an important role in the synthesis process.