Effects of Al substitution on the spontaneous polarization and lattice dynamics of the PbTi1−xAlxO3
作者： Ce Sun , Jinguo Wang , Penghao Hu , Moon J Kim , Xianran Xing
DOI: 10.1039/C000608D
关键词:
摘要: Al-doped PbTiO3 solid solutions were synthesized by a state method. Since Al does not have bonding d-orbit or d-electrons, and the substitutions of Al3+ for Ti4+ in is aliovalent, effect on structure spontaneous polarization quite different from that Hf, Zr, etc. PbTiO3. Usually, weakened with decreased tetragonality PbZrxTi1−xO3 PbHfxTi1−xO3 systems; PbTi1−xAlxO3 (0 ≤x≤ 0.10) exhibit improved (c/a). Lattice dynamics crystal enhanced investigated FT-IR, Raman scattering technique, X-Ray Rietveld The Al-doping reinforced covalence Pb–O(II), which indicated Pb–O hybridization was strengthened. three transverse optical (TO) modes A1-symmetry “stretching” “bending” vibration FTIR further verified increase (PS) A- B-sites.
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