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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.116  No.1349 (January) (2008)  >  pp.141-145

Journal of the Ceramic Society of Japan
<<Previous article Vol.116  No.1349 (January) (2008)   pp.141 - 145 Next article>>

Nano-sized LaMnO3 powders prepared by spray pyrolysis from spray solution containing citric acid

Dae Soo JUNG1), Seung Kwon HONG1) and Yun Chan KANG1)
1) Department of Chemical Engineering, Konkuk University

  Nano-sized lanthanum manganites (LaMnO3) were prepared by spray pyrolysis process from the spray solution with citric acid as organic additive. The LaMnO3 precursor powders obtained from the spray solution with citric acid had thin wall and hollow structures. The thickness of the wall of the precursor powders was below 50 nm. The post-treated LaMnO3 powders had slightly aggregated morphology of the primary powders with nanometer size. The post-treated LaMnO3 turned to nano-sized powders after simple milling by hand using agate mortar. The mean sizes of the LaMnO3 powders obtained from the spray solutions with concentrations of citric acid as 0.4 and 0.8 M at a post-treatment temperature of 800°C were 80 and 200 nm, respectively. The mean size of the LaMnO3 powders changed from several tens nanometer to submicron size according to the post-treatment temperatures. The mean crystallite sizes of the LaMnO3 powders obtained from the spray solution with citric acid at post-treatment temperatures between 700 and 1000°C changed from 26 to 36 nm.



Keyword:
Nano powders, Spray pyrolysis, Lantanium manganite

Received: September 09, 2007
Accepted: November 15, 2007 , Published online: January 01, 2008
Copyright (c) 2008 The Ceramic Society of Japan

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