Synthesis and dielectric properties of modified potassium sodium niobate solid solutions |
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| Authors: | I Smeltere M Antonova A Kalvane K Bormanis M Livinsh |
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| Institution: | 1. Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., Riga, LV-1063, Latvia
2. Center for Innovation and Development of Biomaterials, Riga Technical University, 3/3 Pulka Str., Riga, LV-1007, Latvia
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| Abstract: | In the present work processing microstructure and dielectric properties of lead free KNN based ceramics have been studied. Compositions with a stoichiometric formula (1 ? x)(K0.5Na0.5)Nb1 ? y Sb y O3-xBaTiO3 (x = 0.01, 0.02, 0.04; y = 0.04, 0.07) were produced by solid state sintering method. The addition of manganese oxide MnO2 after synthesis promoted the sintering and densification of ceramic samples. The influence of BaTiO3 on the microstructure, density and electrical properties was investigated. X-ray diffraction analysis confirmed that obtained samples had a pure perovskite structure with no traces of secondary phase. Phase transition peak at T c is broad indicating the diffuse phase transition. |
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