Fiber textured Sr0.53Ba0.47Nb2O6ceramics were reactively sintered to ≥95% of the theoretical density from a mixture of SrNb2O6and BaNb2O6powders. Texture in 〈001〉 was obtained by templated grain growth on 〈001〉-oriented acicular KSr2Nb5O15template particles. The most highly textured ceramics had a peak dielectric constant of 23,600 (atTc= 128 °C), a remanent polarization (Pr) of 20.3 µC/cm2, a saturation polarization (Psat) of 24 µC/cm2(69–96% of single crystal), and a piezoelectric charge coefficient (d33) of 84 pC/N (76–93% of single crystal). A model, correlating polarization with grain orientation, predicts thatPrincreases sharply when a percolating grain network forms to transfer charge between elongated grains.
纤维质地的Sr0.53Ba0.47Nb2O6陶瓷是由SrNb2O6和BaNb2O6粉末混合物反应烧结而成,理论密度≥95%。通过在〈001〉取向的针状 KSr2Nb5O15 模板颗粒上模板化晶粒生长,获得了〈001〉中的纹理。质地最高的陶瓷的峰值介电常数为 23,600 (atTc= 128 °C),剩电位极化 (Pr) 为 20.3 µC/cm2,饱和极化 (Psat) 为 24 µC/cm2(单晶的 69-96%),压电电荷系数 (d33) 为 84 pC/N(单晶的 76-93%)。一个将极化与晶粒取向相关联的模型预测,当在拉长的晶粒之间形成渗流晶粒网络以传递电荷时,极化会急剧增加。