The Influence of Composition and Calcination Temperature on the Phases in (Ba1-xSrxZr)O3 Perovskites


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Torman M., Öksüz K. E. , Şen Ş., Şen U.

10th International Conference on Materials Science Engineering (Bramat 2017), Brasov, Romanya, 8 - 11 Mart 2017, cilt.907, ss.38-42 identifier

Özet

Several ceramic materials with a perovskite structure often exhibit interesting electronic

properties and, therefore, are often called “electroceramics”. Electroceramics with high dielectric

constants are used in capacitors and superconductors. The effect on calcination temperatures

(1000°C–1400°C) and the changing of ions in A and B sites on the phase formation and

microstructure of barium strontium zirconate (Ba1-xSrxZr)O3, BSZ, x = 0.2 and 0.4 ceramics were

investigated. The BSZ powders were prepared using the solid state reaction method. The phase

purity, crystal structure and microstructure of samples were examined using Fourier transform

infrared spectroscopy (FTIR), X-ray diffraction (XRD). We found out that the percentage phase

purity of perovskite increases with an increase in the calcination temperatures as expected and it

was found that BSZ powders adopts a perovskite structure with a cubic ( Pm3m) unit cell as well.

The purity of perovskite powders was obtained above 1300°C and the purity phase of ceramics was

detected in all samples.

Keywords: barium strontium zirconate, cubic perovskite, microstructure, X-ray crystallography.