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Invention Publication
CN101020582A 高性能La、V共掺SrBi4Ti4O15铁电薄膜 无效 - 撤回

高性能La、V共掺SrBi4Ti4O15铁电薄膜
Abstract:
本发明涉及一种高性能La、V共掺SrBi4Ti4O15铁电薄膜。本发明在SrBi3.9La0.1Ti3.97V0.03O15铁电薄膜中La、V掺杂量分别为0.1、0.03，在267kV/cm外电场下其剩余极化(2Pr)达到46.7μC/cm2。本发明解决了现有铁电薄膜存在的如Pb(Ti，Zr)O3的抗疲劳性能差、制备有污染，SrBi2Ta2O9的剩余极化较小，Bi4Ti3O12的抗疲劳性能不好，且剩余极化不大等缺陷。本发明La掺杂增大SrBi4Ti4O15的剩余极化(2Pr)，V掺杂提高其抗疲劳性能，La、V共同掺杂既增大剩余极化又提高抗疲劳性能，矫顽场低，其剩余极化(2Pr)达到46.7μC/cm2，矫顽场(Ec)仅为83kV/cm，SrBi3.9La0.1Ti3.97V0.03O15薄膜在高频和低频下极化Pnv经过2.2×109和1.3×1012次疲劳反转后几乎均无变化，表现出优良的抗疲劳性能。本发明制备工艺简单、组分控制精确，产品质量稳定可靠。
Abstract(English):

The present invention relates to one kind of high performance La and V doped ferroelectric SrBi4Ti4O15 film. The ferroelectric SrBi3.9La0.1Ti3.97V0.03O15 film has La and V doping amount of 0.1 and 0.03 separately, and residual polarization at external electric field of 267 kV/cm up to 46.7 microcoulomb/sq cm, and is superior to available Pb(Ti, Zr)O3 film, SrBi2Ta2O9 film, Bi4Ti3O12 film, etc. The ferroelectric SrBi3.9La0.1Ti3.97V0.03O15 film has increased residual polarization, raised antifatigue performance, low coercive field, simple preparation process, precise component control and stable product quality.

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