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  1. University of Yangon
  2. Department of Chemistry

Influence of synthesis methods and calcination temperature on electrical properties of La1−xCaxMnO3 (x1⁄40.33 and 0.28) ceramics

http://hdl.handle.net/20.500.12678/0000001800
http://hdl.handle.net/20.500.12678/0000001800
194e8258-64f2-46bf-ab78-d2de865e9b3b
09a87980-8510-49a4-b372-13475ae5c594
Publication type
Journal article
Upload type
Publication
Title
Title Influence of synthesis methods and calcination temperature on electrical properties of La1−xCaxMnO3 (x1⁄40.33 and 0.28) ceramics
Language en
Publication date 2013
Authors
Ma, Ji
Mya Theingi
Chen, Qingming
Wang, Wenzhang
Xiang, Liu
Zhanga, Hui
Description
La1−xCaxMnO3 (x¼0.33 and 0.28) powders were prepared by both coprecipitation and sol–gel methods. Circular pellets with different
radial shrinking ratios (RSR) were obtained by changing the calcination temperature of the powders. The influence of the powder synthesis
process and the shrinking ratio of the sample on the structural, morphological and electrical properties of the ceramics were investigated. It has
been found that sol–gel method is more efficient and stable to obtain ceramic samples with good electrical properties. The radial shrinking ratio of
the ceramic increases with the decreasing calcination temperature. The experimental results show that RSR significantly affects the electrical
properties of the ceramics prepared by coprecipitation method and has negligible influence on the samples made by sol–gel method. The
coprecipitation samples with larger RSR have higher insulator to metal transition temperature Tp which is comparable to that of the sol–gel
samples.
Keywords
A. Sol–gel
Identifier http://uyr.uy.edu.mm/handle/123456789/99
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