Synthesis, dielectric, and hysteresis behaviour of Ba(Nb0.2Ti0.8)O3 ceramics and their solid solutions with BaZrO3

Sulepetkar, S. T.; Raibagkar, Ravindra L.
December 2007
Journal of Materials Science: Materials in Electronics;Dec2007, Vol. 18 Issue 12, p1247
Academic Journal
Solid state reaction technique was employed to synthesize Ba(Nb0.2Ti0.8)O3 [BNT], and 0.9Ba(Nb0.2Ti0.8)O3 + 0.1BaZrO3 [BNT + BZ] samples. Sintered pellets were investigated for its dielectric (εr and tanδ) properties in the temperature range 100 K–380 K and in the frequency range of 100 Hz–1 MHz. The variation of εr and tan δ may be attributed to hopping of trapped charge carriers, which resulted in an extra dielectric response in addition to the dipole response. Hysteresis loop measurements were studied in the temperature regime 295 K–423 K. Loop area shrunk with the increase of temperature that may be due to phase transition from ferroelectric to paraelectric state.


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