2015 : Synthesis and Electrical Characterization of 0.8 (K, Na) NbO3-0.2 (Ba, Ca)(Zr, Ti) O3 Lead-Free Ceramics

Prof. Dr. Suasmoro


Abstract

Article PreviewArticle PreviewIn this research, the physical and electrical properties of 0.8 K 0.5 Na 0.5 NbO 3-0.2 Ba 0.5 Ca 0.5 Zr 0.5 Ti 0.5 O 3 (0.8 KNN-0.2 BCZT) were characterized. Lead-free material, 0.8 KNN-0.2 BCZT with and without alkaline excess was synthesized via solid state reaction method. KNN and BCZT were calcined at 700 C and 1200 C for 2 hours respectively and mixed by planetary milling. The mixed powder was recalcined at 1250 C for an hour then sintered at 1150 C, 1200 C and 1250 C for 2 and 4 hours. XRD analysis of 0.8 KNN-0.2 BCZT for excessive (8% Na, 2% K) sample sintered at 1150 C for 4 hours has single phase showing ABO 3 structure (A= K, Na, Ba, Ca and B= Ti, Zr, Nb) and multi phases for the other ones. The microstructure analysis (SEM) showed cubic-like grain shape in which excessive sample possessed greater average grain size than other. Dielectric properties and …