CHARACTERIZATION OF PEROVSKITE-TYPE XSnO3 (WHERE X= Ca, Sr AND Ba) CERAMICS
Abstract
- Perovskite-type CalciumTin Oxide (CaSnO3), Strontium Tin Oxide (SrSnO3) and Barium Tin Oxide(BaSnO3) were prepared by solid state reaction method. Analytical reagent (AR) grade CaCO3, SrCO3,BaCO3 and SnO2 were used as the starting materials with equal molar ratios. The samples were characterized by XRD and SEM.XRD patterns indicated that the samples belong to orthorhombic structure for CaSnO3 and SrSnO3 ceramics and cubic for BaSnO3. The lattice parameters were obtained as a = 5.4982 Å, b = 5.6356 Å and c = 7.8651 Å for CaSnO3, a = 5.7079 Å, b = 5.7072 Å andc = 8.0708 Å for SrSnO3 and a = b = c = 4.1114 Å for BaSnO3 respectively. The crystallite sizes were also obtained as 42.17 nm for CaSnO3,47.34 nm for SrSnO3 and 51.75 nm for BaSnO3 and the obtained crystallite sizes showed that the samples were nanosized ceramic materials. From the SEM micrographs, the grain sizes were obtained as in the range of0.55 μm – 0.58 μm. Electrical conductivities of the samples were investigated in the temperature range of 303 K – 773 K. Electrical conductivity and activation energy of the samples were studied.
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Year
- 2019
Author
-
Zin Bo Htut
Subject
- Physics
Publisher
- Myanmar Academy of Arts and Science (MAAS)