Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

The Effect of Synthesis Route on the Microstructure and Dielectric Properties of Bulk (K0.44-Na0.52Li0.04)(Ta0.1Sb0.06Nb0.84)O3 Piezoceramics

Authors
Mohamad Ali Bahrevar 1
Mehdi Delshad Chermahini 2
Mohamad Reza Rahimipour 1
Homan Shokrollahi 3
1 Materials and Energy Research Center, Department of Semiconductors, Karaj, Iran
2 Energy Research Center, Department of Semiconductors, Karaj, Iran
3 Shiraz University of Thechnology, Department of Electroceramic, Shiraz , Iran
10.30501/jamt.2636.70295
Abstract
Lead free piezoceramics of the (K0.44Na0.52Li0.04)(Ta0.1Sb0.06Nb0.84)O3 specimens were prepared using the conventional ceramic and aqueous colloidal coating approach. The microstructure and dielectric properties of sintered samples prepared by both techniques were investigated for comparison. The XRD patterns indicate the formation of pure perovskite phase for samples prepared by colloidal technique. An additional impurity phase with tungsten bronze structure was detected for samples synthesized by the conventional method. For both methods, the typical cube-like morphology of KNN-LST systems with the bimodal distribution was clearly observed. The relative permittivity and loss factor of samples synthesized by aqueous colloidal coating approach were higher and lower than those obtained by conventional ceramic technique, respectively.
Keywords
Dielectric properties
Aqueous colloidal coating approach
Potassium sodium niobate
XRD
SEM
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Journal of Advanced Materials and Technologies
Volume 4, Issue 2
Summer 2015
Pages 11-17