Characteristics of nano-sized La0.75Sr0.25Cr0.5Mn0.5O3 powders prepared by spray pyrolysis

Dae Soo Jung, Hee Chan Jang, Jung Hyun Kim, Hye Young Koo, Yun Chan Kang, Yoon Ho Cho, Jong Heun Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Nano-sized La0.75Sr0.25Cr0.5Mn0.5O3 (LSCM) powders were prepared by calcination of precursor powders obtained by spray pyrolysis. The precursor powders prepared from the spray solutions with citric acid or ethylene glycol had a spherical shape and a hollow morphology. The precursor powders were converted to nano-sized LSCM powders after calcination at high temperatures. The mean sizes of the LSCM powders calcined at temperatures of 700 and 800°C were 70 and 90 nm. However, the mean sizes of the LSCM powders calcined at temperatures of 1000 and 1100°C were 0.38 and 0.78 μm. The sintered pellets formed from the LSCM powders obtained from the spray solution without an organic additive had high porosities. The hollow structure of the LSCM powders produced the sintered pellets with high porosities. The sintered pellets obtained from the nano-sized LSCM powders had dense structures and low porosities. However, the sintered pellets obtained from the submicrometre-sized LSCM powders had regular pore structures and high porosities.

Original languageEnglish
Pages (from-to)322-327
Number of pages6
JournalJournal of Ceramic Processing Research
Volume11
Issue number3
Publication statusPublished - 2010

Keywords

  • Lanthanum manganate
  • Nano powder
  • Spray pyrolysis

ASJC Scopus subject areas

  • Ceramics and Composites

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