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Synthesis of Magnesium Aluminate Spinel Platelets from α‐Alumina Platelet and Magnesium Sulfate Precursors
Author(s) -
Hashimoto Shinobu,
Zhang Shaowei,
Lee William Edward,
Yamaguchi Akira
Publication year - 2003
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.1151-2916.2003.tb03589.x
Subject(s) - spinel , magnesium , platelet , aluminate , materials science , hexagonal crystal system , metallurgy , mineralogy , chemical engineering , inorganic chemistry , chemistry , crystallography , cement , biology , engineering , immunology
Spinel platelets were formed from a powder mixture of 3–5 μm wide and 0.2–0.5 μm thick α‐Al 2 O 3 and 1–8 μm (average 3 μm) MgSO 4 heated 2 h at 1200°C. The hexagonal platelet shape of the original α‐Al 2 O 3 platelet was maintained in the spinel, although their size was slightly increased and their surface roughened. When a mixture of α‐Al 2 O 3 platelets and MgO powder was heated 3 h at 1400°C, the spinel formed lost the platelet morphology of the alumina.