15R陶瓷的电致应变性能具有良好的热稳定性Spos可以维持到125℃室温下81而织构化工艺可以促进极化翻转从而带来了较高的极化和电致应变性能可以推测织构化陶瓷的电致应变性能可能也具有良好的热稳定性。图s3c显示了15T陶瓷在不同温度下的S-E双极应变曲线图5e显示了15T陶瓷的Spos、Sneg和Pmax2-Pr2与温度关系图15T陶瓷的S-E双极应变曲线、Spos和Sneg变化规律与15R陶瓷相

The electrostrictive performance of 1.5R ceramics has good thermal stability, and Spos can be maintained at 81% at 125℃. The texture process can promote polarization flipping, thereby bringing higher polarization and electrostrictive performance. It can be speculated that the electrostrictive performance of textured ceramics may also have good thermal stability. Figure s3c shows the S-E bipolar strain curve of 1.5T ceramics at different temperatures, and Figure 5e shows the relationship between Spos, Sneg, Pmax2-Pr2 and temperature of 1.5T ceramics. The change rules of S-E bipolar strain curve, Spos, and Sneg of 1.5T ceramics are similar to those of 1.5R ceramics. However, like the piezoelectric coefficient, as the temperature rises, Spos of 1.5T ceramics changes more significantly, from about 0.09% to 0.13%, and the temperature stability also improves. Near 125 ℃, Spos is 98% of room temperature. The improved temperature stability and obvious temperature dependence of Spos of 1.5T ceramics can be attributed to the texture process inducing easier polarization flipping. According to previous reports, there is a close relationship between electrostrictive strain and polarization, and the value of Pmax2-Pr2 can better fit the change of Spos. Therefore, it can be concluded that after the texture process of NN-based relaxor ferroelectric ceramics, the content of FMs increases, and Pmax and Pr will be greatly improved. Under the action of the temperature field, the number of FMs decomposing into RFNs will also increase. Therefore, before Pmax rapidly decreases, Pr has already undergone rapid decrease, leading to the improvement of electrostrictive performance, accompanied by the effect of grain orientation, Spos shows a more obvious increase.