Dielectric Properties of La2O3 Doped Composite (PbxSr1−x)TiO3 Borosilicate Glass Ceramic | Zendy

Chandkiram Gautam | Zendy; Devendra Kumar | Zendy; Om Parkash | Zendy; O. P. Thakur | Zendy

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Dielectric Properties of La₂O₃ Doped Composite (Pb_xSr_1−x)TiO₃ Borosilicate Glass Ceramic

Author(s) -

Chandkiram Gautam,

Devendra Kumar,

Om Parkash,

O. P. Thakur

Publication year - 2013

Publication title -

journal of ceramics

Language(s) - English

Resource type - Journals

eISSN - 2090-8628

pISSN - 2090-8644

DOI - 10.1155/2013/879758

Subject(s) - materials science , borosilicate glass , dielectric , ferroelectricity , analytical chemistry (journal) , perovskite (structure) , ceramic , mineralogy , crystallography , chemistry , composite material , optoelectronics , chromatography

Ferroelectric (PbxSr1−x)TiO3 (PST) perovskite phase has been crystallized in borosilicate glassy matrix with a suitable choice of composition and heat treatment schedule. La2O3 is a donor dopant for PST and can make it semiconducting. Dispersion of semiconducting perovskite phase in insulating glassy matrix in glass-ceramic samples may lead to the formation of space charge polarization around crystal-glass interface, leading to a high value of effective dielectric constant, εr. Therefore, with the aim of the developing glass ceramics with high dielectric constant, glasses in the system 64[(PbxSr1−x)O·TiO2]-25[2SiO2·B2O3]-5[K2O]-5[BaO]-1[La2O3] have been prepared (0.5≤x≤1). It is found that the addition of La2O3 strongly affected the crystallization and dielectric behavior of glass-ceramic with PST perovskite phase. All glass ceramic samples show a diffuse broad Curie peak in their εr versus T plots. Curie peak temperature, Tc, depends on compositions of the glass-ceramic samples as well as frequency of measurements

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