Electric conduction and dielectric relaxation behavior in (1-x)(Bi0.5Na0.5TiO3-BaTiO3)-xNaNbO3 ((1-x)(BNT-BT)-xNN) ceramics were investigated. All compositions showed negative temperature coefficient of resistance (NTCR) behavior. The bulk conductivity followed the Arrhenius law with Ea = 1.24-1.55 eV, which can be attributed to the electronic conduction. In the modulus (M''-f) spectra, a peak and a shoulder were observed, corresponding to the bulk and polar nano regions (PNRs) response respectively. With the increase of either temperature or NN content, the shoulder gradually depressed and even disappeared. A correlation between the PNRs evolution and the relaxation behavior was constructed.
|Original language||English (US)|
|Number of pages||9|
|Journal||Journal of the European Ceramic Society|
|State||Published - Aug 1 2016|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry