材料科学
相界
压电
居里温度
电介质
四方晶系
陶瓷
分析化学(期刊)
矫顽力
钙钛矿(结构)
相(物质)
凝聚态物理
晶体结构
复合材料
结晶学
铁磁性
光电子学
物理
有机化学
化学
色谱法
作者
Jian Guo,Zhenhai Ning,Dongyan Fu,Jinrong Cheng,Jianguo Chen
摘要
Abstract The x BiFeO 3 ‐(1‐ x )Ba(Zr 0.02 Ti 0.98 )O 3 + 1.0 mol% MnO 2 ( x BF‐BZT) lead‐free piezoelectric ceramics were prepared by conventional solid‐state reaction method. The structure, dielectric, and piezoelectric properties were studied. X‐ray diffraction (XRD) analysis showed that x BF‐BZT ceramics exhibited pure perovskite structure with the coexistence of tetragonal and rhombohedral phases (0.66 ≤ x ≤ 0.74). The Curie temperature T c , the dielectric constant ε r (1 kHz), dielectric loss tan δ (1 kHz), piezoelectric constant d 33 , coercive field E c (80 kV/cm), and remnant polarization P r (80 kV/cm) of 0.7BF‐0.3BZT‐Mn ceramics were 491°C, 633, 0.044, 165 pC/N, 35.6 kV/cm, and 22.6 μC/cm 2 , respectively. The unipolar strain of 0.7BF‐0.3BZT reached up to 0.20% under the electric field of 60 kV/cm, which is larger than that (0.15%) of BiFeO 3 –BaTiO 3 ceramics. These results indicated that the x BF‐BZT ceramics were promising candidates for high‐temperature piezoelectric materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI