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首页> 外文期刊>RSC Advances >The microscopic mechanism in the realization of ultra-wide temperature range stability in Bi3+,Na+,Zn2+,Nb5+ doped BaTiO3 dielectric system
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The microscopic mechanism in the realization of ultra-wide temperature range stability in Bi3+,Na+,Zn2+,Nb5+ doped BaTiO3 dielectric system

机译：在Bi3 +，Na +，Zn2 +，NB5 +掺杂BATIO3电介质系统中实现超宽温度范围稳定性的显微镜机理

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摘要

A novel lead-free, ultra-wide temperature range stable dielectric ceramic with a high dielectric constant was prepared by a traditional solid-state reaction method. The microscopic mechanism, and the electric and dielectric properties of the Bi ~(3+) ,Na ~(+) ,Zn ~(2+) ,Nb ~(5+) doped BaTiO _(3) dielectric system were investigated for the first time. X-ray diffraction revealed that Bi ~(3+) ,Na ~(+) ,Zn ~(2+) ,Nb ~(5+) and BaTiO _(3) form a solid-solution with a pseudo-cubic structure. The thermal vibration and interactions between the dipoles contributing to the realization of an ultra-wide temperature range stability, were discussed. The microscopic model based on the bond energy and coordination number, was used to research the changes of the dielectric stability. In this paper, the relationship between microscopic mechanism and the macroscopic dielectric properties in the ultra-wide temperature range stable dielectric ceramics was established, thereby paving the way for achieving ultra-wide temperature range capacitors. In addition, fine dielectric properties of (Na _(0.015) Bi _(0.3) Ba _(0.685) )(Zn _(0.2) Nb _(0.115) Ti _(0.685) )O _(3) with an ε _(r) of 700, and tan? δ of 0.00535 can be obtained over an ultra-wide temperature range (?53 to 350 °C). These features give the ceramic system high practical value in miniaturization and increasing applications in harsh environments.
机译：通过传统的固态反应方法制备具有高介电常数的新型无铅超宽温度范围稳定的介电陶瓷。研究了微观机理，以及Bi〜（3+），Na〜（+），Zn〜（2+），Nb〜（5+）掺杂BATIO _（3）介电系统的电气和介电性能第一次。 X射线衍射显示，Bi〜（3+），Na〜（+），Zn〜（2+），Nb〜（5+）和BaTiO _（3）形成具有伪立方结构的固溶体。讨论了有助于实现超宽温度范围稳定性的偶极之间的热振动和相互作用。基于粘合能量和协调数量的微观模型用于研究介电稳定性的变化。本文建立了微观机理与超宽温度范围稳定介电陶瓷中的微观机理与宏观电介质特性的关系，从而铺平了实现超宽温度范围电容器的方式。此外，（Na _（0.015）Bi _（0.3）Ba _（0.685））（Zn _（0.2）Nb _（0.115）Ti _（0.685））O _（3）的细介电性质（Zn _（0.2））（0.685））O _（3） （r）700和Tan？ δ在超宽温度范围内（α53至350℃），可以获得0.00535。这些特征使陶瓷系统在恶劣环境中的小型化和增加应用中的高实用价值。

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