2014年, 我们稳定地成功获得系列高阻改性BiFeO₃陶瓷。由此我们认为BiFeO₃陶瓷的漏电是非本征的晶格空位行为。并发现丰富相变现象及其后果：

1.Linlin Zhang, Jian Yu^*, and Mitsuru Itoh, Structural phase transitions of robust insulating Bi_1-xLa_xFe_1-yTi_yO₃ multiferroics, J. Appl. Phys. 115, 123523(2014)

2. Linlin Zhang, and Jian Yu*, Residual tensile stressin robust insulatingrhombohedral Bi_1-xLa_xFe_1-yTi_yO₃multiferroicceramics and its ability to pin ferroelectric polarization switching, Appl. Phys. Lett.106, 112907 (2015).