Structure and Dielectric Properties of Bi0.5K0.5TiO3-SrTiO3 Lead-Free Ceramics

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Bismuth potassium titanate – strontium titanate (1-x)Bi0.5K0.5TiO3-(x)SrTiO3 (BKT-ST) lead-free ceramics when x = 0-0.20 were synthesized by the solid state reaction method with normal sintering. The ferroelectric phase transition was studied by X-ray diffraction (XRD). All compositions showed a single phase perovskite structure with tetragonal symmetry at room temperature and the phase structure transformed from ferroelectric tetragonal – paraelectric cubic in the range of x ³ 0.10 . Dielectric study revealed that the dielectric relaxor behavior was induced with increasing ST and transition temperature (Tm@εr max) of ST-doped BKT had a tendency to decrease with increasing ST. The Bi0.5K0.5TiO3 – SrTiO3 system was expected to be a new and promising candidate for lead-free capacitors.

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Periodical:

Edited by:

Hyungsun Kim, Jian Feng Yang, Chuleol Hee Han, Somchai Thongtem and Soo Wohn Lee

Pages:

166-169

DOI:

10.4028/www.scientific.net/MSF.695.166

Citation:

A. Ruangphanit et al., "Structure and Dielectric Properties of Bi0.5K0.5TiO3-SrTiO3 Lead-Free Ceramics", Materials Science Forum, Vol. 695, pp. 166-169, 2011

Online since:

July 2011

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$35.00

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