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Nanosized Zinc‐Oxide Particles Derived from Mechanical Activation of Zn 5 (NO 3 ) 2 (OH) 8 ·2H 2 O in Sodium Chloride
Author(s) -
Fah Chong Phui,
Xue Junmin,
Wang John
Publication year - 2002
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.1151-2916.2002.tb00081.x
Subject(s) - calcination , nanocrystalline material , zinc , materials science , chemical engineering , zinc hydroxide , inorganic chemistry , hydroxide , zinc nitrate , decomposition , particle size , chemistry , catalysis , metallurgy , nanotechnology , organic chemistry , engineering
Nanosized ZnO particles are successfully synthesized via mechanical activation of a zinc nitrate hydroxide hydrate (Zn 5 (NO 3 ) 2 (OH) 8 ·2H 2 O) precursor in NaCl matrix for 15 h. The ZnO particles obtained are in the nanosize range of ∼20 nm, with a well‐established hexagonal morphology. They compare favorably with those derived from conventional calcination of the precursor. The decomposition of Zn 5 (NO 3 ) 2 (OH) 8 ·2H 2 O precursor and formation of nanocrystalline ZnO cannot be completed by mechanical activation in the absence of NaCl, which acts as both an effective dispersing matrix and drying agent although it remains chemically inert during mechanical activation. The powder derived from calcination at 400°C does not possess powder characteristics comparable to that of the powder derived from the mechanical activation in NaCl, because of the extensive particle coarsening and aggregation at the calcination temperature.