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Hydrothermal Synthesis of Nanosized CoAl 2 O 4 on ZnAl 2 O 4 Seed Crystallites
Author(s) -
Chen ZhiZhan,
Shi ErWei,
Zheng YanQing,
Xiao Bing,
Zhuang JiYong
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.tb03424.x
Subject(s) - crystallite , hydrothermal circulation , hydrothermal synthesis , seeding , materials science , chemical engineering , particle size , mineralogy , grain size , salt (chemistry) , chemistry , metallurgy , agronomy , engineering , biology
ZnAl 2 O 4 ‐seeded CoAl 2 O 4 , with a core‐shell structure, has been prepared under hydrothermal conditions when the Co 2+ salt solution is substituted by 10% Zn 2+ as a precursor. The ZnAl 2 O 4 seed is generated during the synthesis process. The seeding process can decrease the synthesis temperature from 245° to 230°C and the particle size from 67 to 20 nm. The process can economize the consumption of Co 2+ and control the particle size effectively.