Synthesis of High Quality LaCoO3 Crystals Using Water Based Sol-Gel Method
International Journal of Materials Science and Applications
Volume 4, Issue 3, May 2015, Pages: 159-164
Received: Mar. 28, 2015; Accepted: Apr. 15, 2015; Published: Apr. 24, 2015
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Author
Abdur Razzaque Sarker, Department of Physics, Rajshahi University, Rajshahi, Bangladesh; Center for Crystal Science and Technology, University of Yamanashi, Kofu, Yamanashi, Japan
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Abstract
Lanthanum cobaltite (LaCoO3) crystalline material is a promising material for its interesting electrical, magnetic, catalytic and thermoelectric properties. In this study, LaCoO3 powders were synthesized by water based sol-gel method using metal nitrates as precursors and citric acid as the chelating agent at room temperature. The dried powders were amorphous and their thermal decomposition occurs stepwise upon heating to 400 °C. Pure perovskite-type single phase LaCoO3 polycrystals are formed after heating at 600 °C. The pallets prepared from calcined powers were sintered at 1200 °C and crystalline pallets were characterized for investigation of electrical, optical and thermoelectric properties. The obtained results revealed that the prepared samples were highly crystalline with large cation ordering. The sol-gel method found to be efficient for much production of a lot of crystalline transition metal oxides at low cost.
Keywords
Ceramics, Heat Treatment, Sol-Gel Method, Powder Diffraction, Optical Properties
To cite this article
Abdur Razzaque Sarker, Synthesis of High Quality LaCoO3 Crystals Using Water Based Sol-Gel Method, International Journal of Materials Science and Applications. Vol. 4, No. 3, 2015, pp. 159-164. doi: 10.11648/j.ijmsa.20150403.13
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