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Size Control of α‐Al 2 O 3 Platelets Synthesized in Molten Na 2 SO 4 Flux
Author(s) -
Jin Xihai,
Gao Lian
Publication year - 2004
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.1551-2916.2004.00533.x
Subject(s) - platelet , seeding , flux (metallurgy) , materials science , morphology (biology) , chemistry , metallurgy , nuclear chemistry , analytical chemistry (journal) , chemical engineering , chromatography , thermodynamics , physics , genetics , engineering , immunology , biology
α‐Al 2 O 3 platelet powders were synthesized in molten Na 2 SO 4 flux. The size of α‐Al 2 O 3 platelets was significantly reduced when partially decomposed rather than pure Al 2 (SO 4 ) 3 was used as the source of Al 2 O 3 ; a further reduction in the platelet size was realized through additional seeding with nanosized α‐Al 2 O 3 seeds. The addition of microsized α‐Al 2 O 3 platelet seeds significantly influenced the platelet morphology of the final powder, as well. The platelet size of the final powder was in direct proportion to the size of the platelet seeds, and was in reverse proportion to the cube root of the platelet seed content.