The ceramics with Pb1.04Zr0.52Ti0.48O3 + z wt.% Cr2O3 were prepared using the traditional technique. The effects of Cr2O3 doping on the phase structure, the microstructure, and the electrical properties of ceramics were investigated. Meanwhile, the temperature stabilities of the reso-nant frequency (fr) were studied. The results showed that the △fr/fr,25°C decreased with the addition of 0.2 wt.% - 0.8 wt.% Cr2O3 as compared with the undoped samples. The minimum value (-0.182%) of △fr/fr,25°C was obtained for z = 0.6 wt.% Cr2O3 samples that sintered at 1260°C. The values of ε T 33/ε0 = 1650, tanδ = 0.006, d33 = 328 pC/N, Kp = 0.63, Qm = 2300 were obtained when Cr2O3 was 0.6 wt.%, which exhibited more excellent piezoelectric properties than other compositions such as those with z = 0.2 wt.%, 0.4 wt.%, and 0.8 wt.%, but had a similar value as compared with the undoped samples. When the Cr2O3 additive increased, the Curie temperature moved toward low temperature and the changes of resonant frequency changed from positive to negative with increasing temperature.
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机译:0.9K1-xNaxNbO3- 0.06LiNbO3-0.04SrTiO3 陶瓷压电性能温度稳定性研究 The Study of Piezoelectric Temperature Stability of 0.9K1-xNaxNbO3- 0.06LiNbO3-0.04SrTiO3Ceramics