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

Abstract

Perovskite ceramics (Ba 0.6 Pb 0.4)TiO 3 modified with PbO-B 2 O 3-Al 2 O 3-WO 3 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.

Obtaining and main dielectric properties of Ba0.6Pb0.4TiO3/graphene oxide composite

“…For potential applications in microelectronics, PTCR can be interesting. A similar effect has been found, for instance, in ceramics of solid solutions (Pb 0.65 Ba 0.35 )-TiO 3 and (Pb 0.8 Ba 0.2 )TiO 3 [4]. Ferroelectric hysteresis loops below 90°C are wide and typical for materials with rather high electrical conductivity.…”

“…In the solid solution of Ba 1-x Pb x TiO 3 , the Curie temperature linearly decreases from approximately 500°C for x = 1 to about 120°C for x = 0. More recent data on BPT ceramics doped by special glass are presented, for instance, in work [4].…”

Obtaining and Main Dielectric Properties of Ba0.6Pb0.4TiO3/graphene Oxide Composite

“…x Pb x TiO 3 the Curie temperature linearly decreases from about 500 °C for x = 1 to about 120 °C for x = 0. More recent data on Ba 0.6 Pb 0.4 TiO 3 ceramics doped by special glass are presented, for instance, in work [4].…”