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Erschienen in:
01.02.2014
Dielectric, ferroelectric, and piezoelectric properties of Sb2O3-modified (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free ceramics
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 2/2014
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Abstract
The microstructures, phase structure, and electrical properties have been investigated for the Sb2O3-modified (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoelectric ceramics. The grain size was strongly affected by Sb2O3, and the solid solutions show a single phase perovskite structure. The ceramics with x = 0.1 % exhibit enhanced electrical properties of d
33 ∼556 pC/N, k
p ∼52 %, ε
r ∼3,895, tan δ ∼1.3 %, and P
r ∼12.6 μC/cm2 when sintered at a low temperature of ∼1,350 °C. The high temperature stability of ferroelectric properties (P
r ∼14.8 μC/cm2) was obtained in the temperature range from −60 to 0 °C. And with the addition of small amount of Sb2O3, Curie temperature (T
c
) maintains virtually unaltered.