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首页> 外文期刊>Key Engineering Materials >Synthesis and Structure of Sol-gel Derived PST/Bi_2Ti_2O_7 Composite Thin Films
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Synthesis and Structure of Sol-gel Derived PST/Bi_2Ti_2O_7 Composite Thin Films

机译：溶胶凝胶衍生的PST / Bi_2Ti_2O_7复合薄膜的合成与结构

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摘要

PST/Bi_2Ti_2O_7 composite thin films were prepared by sol-gel method through heavily doping Bi~(3+) into lead strontium titanate (PST). The film with mono pyrochlore phase of Bi_2Ti_2O_7 was also fabricated by controlling the Ti content in precursors. XRD, SEM and impedance analyzer measured the phase status, morphology and dielectric properties of the thin films, respectively. As a result, in the composite thin films, there was some Pb and Sr dissolved in Bi_2Ti_2O_7, and the amount of dissolving ions decreased with the reduction of their composition in precursors. Bi_4Ti_3O_(12) impurity in crystalline Bi_2Ti_2O_7 was due to the instability of Bi, and excess Ti in stoichiometry could make the film maintain to be mono pyrochlore phase. PST/Bi_2Ti_2O_7 composite thin films had lower permittivity and lower dielectric loss than mono PST thin films.
机译：采用Bi-（3+）重掺杂钛酸铅锶（PST）溶胶-凝胶法制备了PST / Bi_2Ti_2O_7复合薄膜。还通过控制前驱体中的钛含量制备了具有Bi_2Ti_2O_7的单烧绿石相的薄膜。 XRD，SEM和阻抗分析仪分别测量了薄膜的相态，形态和介电性能。结果，在复合薄膜中，有一些Pb和Sr溶解在Bi_2Ti_2O_7中，并且溶解离子的数量随着前驱体中组成的减少而减少。 Bi_2Ti_2O_7晶体中的Bi_4Ti_3O_（12）杂质是由于Bi的不稳定性所致，化学计量中过量的Ti可使薄膜保持为单烧绿石相。与单PST薄膜相比，PST / Bi_2Ti_2O_7复合薄膜具有较低的介电常数和较低的介电损耗。

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