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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Synthesis and properties of ferroelectric SrBi_2Ta_2O_9 powder and films prepared by a sol-gel process
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Synthesis and properties of ferroelectric SrBi_2Ta_2O_9 powder and films prepared by a sol-gel process

机译：溶胶-凝胶法制备铁电SrBi_2Ta_2O_9粉末和薄膜及其性能

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摘要

Crystalline powder with particle size<200 nm and films with thickness<350 nm of SrBi_2Ta_2O_9 (SBT) with a layered perovskite structure were prepared by a sol-gel technique using an alkoxide-carboxylate precursor solution. The structural variation of the SBT powder with annealing temperature was studied by thermogravimetry (TGA), differential thermal analysis (DTA), Fourier transform infrared (FT-IR) spectroscopy and X-ray diffractometry (XRD). The lowest temperature for the formation of a pure perovskite phase of SBT was found to be 650 deg C. The average crystallite diameter in the films annealed at 650 deg C was 70 nm. The ferroelectric hysteresis loop of the SBT films was also obtained.
机译：使用醇盐-羧酸盐前体溶液通过溶胶-凝胶技术制备了具有层状钙钛矿结构的SrBi_2Ta_2O_9（SBT）粒径<200 nm的结晶粉末和厚度<350 nm的薄膜。通过热重分析（TGA），差热分析（​​DTA），傅立叶变换红外光谱（FT-IR）和X射线衍射（XRD）研究了SBT粉末随退火温度的结构变化。发现形成SBT的纯钙钛矿相的最低温度为650℃。在650℃退火的膜中的平均微晶直径为70nm。还获得了SBT薄膜的铁电磁滞回线。

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