Effect of Sintering Temperature on the Phase Formation, Microstructure and Electrical Properties of (Bi0.5Na0.5)0.93(Ba0.945Ca0.055)0.07(Ti0.9896La0.0025Nb0.0025Sn0.0054)O3 Solid Solutions Prepared by the Solid State Combustion Technique

Chittakorn Kornphom, Thanakit Inthachim, Theerachai Bongkarn


In this study, the effect of the sintering temperature (950-1150oC for 2 h) on the phase formation, microstructure and electrical properties of (Bi0.5Na0.5)0.93(Ba0.945Ca0.055)0.07 (Ti0.9896La0.0025Nb0.0025Sn0.0054)O3 (BNBC)(TLNS) solid solutions prepared via the solid state combustion technique, using glycine as fuel, were studied. The XRD pattern of all sintered sampled exhibited a single perovskite structure with the co-existence of the rhombohedral and tetragonal phases. The average grain size increased with increasing sintering temperature. The density, dielectric constant (at Tr and Tm) and piezoelectric constant (d33) all increased as the sintering temperature increased up to 1100oC and then all values dropped. The sample that showed the highest density (5.87 g/cm3), the highest dielectric constant (er @ 1978, em @ 6287), and the highest d33 value (228 pC/N), was the sample sintered at 1100oC.

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