Dielectric and piezoelectric characteristics of samarium modified lead titanate ceramics

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2003-10, Vol.103 (2), p.145-151
• Main Authors: Tickoo, Ravender, Tandon, R.P., Bamzai, K.K., Kotru, P.N.
• Format: Article
• Language: English
• Subjects: Ceramics; Dielectric; Piezoelectric; Sm-modified lead titanate
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/S0921-5107(03)00178-8

Dielectric and piezoelectric properties of samarium (Sm) modified lead titanate ceramics (Pb 1− x Sm x Ti 1−2 y W y Fe y O 3 with x=0.02, 0.05, 0.10, 0.20 and y=0.02), prepared by high temperature solid state reaction method, have been studied. Variation of dielectric constant and conductivity at room temperature shows frequency dependence and is expressed by Kramer's Kronig relation ( ε′( ω)− ε α = A 1 ω s−1 ) and σ ac( ω)= A 2 ω s , respectively. All compositions show phase transition and the temperature of phase transition is found to decrease with increase in Sm substitution. Nature of transition studied by the relation (1/ ε′)−(1/ ε max)= C( T− T c) γ is found to be diffused. A nonlinear increase in the value of d 33 is observed with the increase in Sm content.