2024-03-28T23:57:27Z
https://meral.edu.mm/oai
oai:meral.edu.mm:recid/1800
2021-12-13T05:21:02Z
1582963390870:1582967633684
user-uy
Influence of synthesis methods and calcination temperature on electrical properties of La1−xCaxMnO3 (x1⁄40.33 and 0.28) ceramics
Ma, Ji
Mya Theingi
Chen, Qingming
Wang, Wenzhang
Xiang, Liu
Zhanga, Hui
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.
2013
http://hdl.handle.net/20.500.12678/0000001800
https://meral.edu.mm/records/1800