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Electric and dielectric properties of (Ba0.6Pb0.4)TiO3 ceramics modified with special glass in the range of phase transition

Wodecka-Duś Beata (University of Silesia, Faculty of Computer Science and Material Science, Institute of Technology and Mechatronics, Sosnowiec, Poland)
Adamczyk-Habrajska Malgorzata (University of Silesia, Faculty of Computer Science and Material Science, Institute of Technology and Mechatronics, Sosnowiec, Poland)
Goryczka Tomasz (University of Silesia, Institute of Materials Science, Faculty of Computer Science and Material Science, Chorzow, Poland)
Radoszewska Daria (University of Silesia, Faculty of Computer Science and Material Science, Institute of Technology and Mechatronics, Sosnowiec, Poland)
Feliksik Kamil (University of Silesia, Faculty of Computer Science and Material Science, Institute of Technology and Mechatronics, Sosnowiec, Poland)
Kozielski Lucjan (University of Silesia, Faculty of Computer Science and Material Science, Institute of Technology and Mechatronics, Sosnowiec, Poland)

Perovskite ceramics (Ba0.6Pb0.4)TiO3 modified with PbO-B2O3-Al2O3-WO3 special glass was prepared with the conventional mixed oxide method. X-ray diffraction analysis (XRD) of the obtained materials confirmed singlephase and pure tetragonal structure. The Rietveld method was used to determine unit cell parameters. Uniform deformation of the tetragonal parameter was observed with addition of the glass. Dielectric measurements revealed the remarkable influence of special glass admixture on the value of dielectric permittivity and dielectric losses, as well as the Curie temperature. However, the most important achievement of the investigations is obtaining a significant PTCR effect in the sample containing 6 wt.% of special glass admixture.

Keywords: (Ba0.6Pb0.4)TiO3, special glass modifier, dielectric properties, PTCR effect