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The influence of BMN addition on the phase formation, microstructure and dielectric property of BaTiO3 ceramic
Author(s)
Pulphol, Nattakarn
Roongtao, Rachanusorn
Date Issued
January 1, 2013
Type
Article
Abstract
Solid solutions of the (1-x)BT-xBMN system were prepared successfully by the solid state reaction method followed by normal sintering in air. The phase formation, microstructure and dielectric property of BT-BMN ceramics were investigated as a function of compositions. XRD results showed a single perovskite phase for all compositions. Cubic-tetragonal transformation was found after adding BMN into the system. SEM micrographs revealed two very different grain sizes in the ceramics, with compositions of x = 0.02, 0.03, 0.04 and 0.05. Fine grains indicated a cubic structure, whereas large ones indicated a tetragonal structure. Regarding the dielectric property, Curie temperature decreased with increasing BMN content, whereas the er value increased until the BMN content reached 3 mol% before dropping to a lower value. Copyright © 2013 Taylor & Francis Group, LLC.
Citation
Ferroelectrics, 451(1), 15-21, 2013
Subjects