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- Title
Relaxor Behavior and Dielectric Relaxation in Lead-Free Solid Solutions of (1 − x)(BiNaTiO)- x(SrNbO).
- Authors
Bajpai, P.; Singh, K.; Tamrakar, Preeti
- Abstract
Lead-free compositions (1 − x) (BiNaTiO)- x(SrNbO) (BNT-SN) are synthesized by a simple solid state reaction route. SN diffuse in distorted perovskite BNT for low concentrations of SN ( x ≤ 0.03) and are stabilized in rhombohedral perovskite phase with experimentally observed relative density of the ceramics >92%. A temperature-dependent dielectric response exhibits a broad dielectric peak that shows frequency-dependent shifts towards higher temperatures reflecting typical relaxor behavior. Modified Curie-Weiss law and Lorentz-type empirical relationships are used to fit the dielectric data that exhibit almost complete diffuse phase transition characteristics. In addition, significant dielectric dispersion is observed in a low-frequency regime in both components of the dielectric response and a small dielectric relaxation peak is observed. Cole-Cole plots indicate the poly-dispersive nature of the dielectric relaxation.
- Subjects
ELECTRIC properties of bismuth titanate; STRONTIUM oxide; NIOBATES; DIELECTRIC relaxation; HIGH temperatures; CURIE-Weiss law; X-ray diffraction; LEAD
- Publication
Journal of Electronic Materials, 2016, Vol 45, Issue 2, p928
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-015-4226-2