Department of Chemistry and 4D LABS, Simon Fraser University, Burnaby, BC, Canada.
IEEE Trans Ultrason Ferroelectr Freq Control. 2010 Oct;57(10):2177-81. doi: 10.1109/TUFFC.2010.1675.
Ferroelectric ceramics derived from the solid solution of (1-x)PbTiO₃-xBiAlO₃ (x = 0, 0.05, 0.10, 0.15, and 0.18) have been synthesized by solid-state reactions. A pure perovskite phase is formed for 0 ≤ x ≤ 0.15. The tetragonality (c/a) of the solid solution decreases with the increasing amount of BiAlO₃. Scanning electron microscopic images reveal a microstructure with a fine grain size of less than 1 μm for the solid solution ceramics (x ≥ 0.05). Compared with pure PbTiOPbTiO₃ ceramics whose high conductivity and poor densification were harmful to their dielectric performance, the ceramics of (1-x)PbTiO₃-xBiAlO₃ are well-densified (with a relative density of up to 93%) and their dielectric and ferroelectric properties are significantly improved with the addition of BiAlO₃, exhibiting reduced dielectric losses, well-developed P-E hysteresis loops (for x = 0.05, 0.10, and 0.15) and a high remnant polarization (P(r)) of 64 μC/cm² (for x = 0.15).
通过固态反应合成了（1-x）PbTiO₃-xBiAlO₃（x = 0、0.05、0.10、0.15 和 0.18）的固溶体铁电陶瓷。0≤x≤0.15 时形成纯钙钛矿相。固溶体的四方度（c/a）随 BiAlO₃ 含量的增加而降低。扫描电子显微镜图像显示，固溶体陶瓷（x≥0.05）的微观结构具有小于 1μm 的细晶粒尺寸。与高电导率和较差致密化不利于介电性能的纯 PbTiO₃ 陶瓷相比，添加 BiAlO₃ 后，（1-x）PbTiO₃-xBiAlO₃ 陶瓷的致密化程度得到显著提高（相对密度高达 93%），介电和铁电性能也得到显著改善，介电损耗降低，P-E 滞后环得到很好的发展（x = 0.05、0.10 和 0.15），剩余极化强度（P(r)）高达 64μC/cm²（x = 0.15）。
