3陶瓷。利用X射線衍射儀、掃描電子顯微鏡和能譜儀分別對(duì)樣品的物相、微觀結(jié)構(gòu)和化學(xué)組分進(jìn)行表征,并測(cè)量了樣品的電學(xué)參數(shù)。結(jié)果表明：Y摻雜能有效降低室溫電阻,但過(guò)量的Y會(huì)在晶界處偏析,其與晶界上的Mn相互作用,削弱PTC效應(yīng)。通過(guò)晶粒和晶界的協(xié)同作用,可有效調(diào)控BaTiO3陶瓷的PTC效應(yīng)。"/>

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晶粒與晶界對(duì)BaTiO3基陶瓷PTC效應(yīng)的協(xié)同調(diào)制研究
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西安電子科技大學(xué)先進(jìn)材料與納米科技學(xué)院,西安電子科技大學(xué)先進(jìn)材料與納米科技學(xué)院,西安電子科技大學(xué)先進(jìn)材料與納米科技學(xué)院,西安電子科技大學(xué)先進(jìn)材料與納米科技學(xué)院,西安電子科技大學(xué)先進(jìn)材料與納米科技學(xué)院,西北工業(yè)大學(xué)凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室

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國(guó)家自然科學(xué)基金資助(51602240)；高等學(xué)校博士學(xué)科點(diǎn)專(zhuān)項(xiàng)科研基金新教師類(lèi)資助課題(20130203120016)；陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2015JQ6252)；寧波市自然科學(xué)基金(2015A610109,2015A610037)


Coordinating Control of the PTC Effect on BaTiO3 Based Ceramic by Grain and Grain Boundary
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School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,School of Advanced Materials and Nanotechnology,Xidian University,State Key Lab of Solidification Processing,Northwestern Polytechnical University

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    摘要:

    采用傳統(tǒng)的固相法,制備了Y、Mn共摻雜的BaTiO3陶瓷。利用X射線衍射儀、掃描電子顯微鏡和能譜儀分別對(duì)樣品的物相、微觀結(jié)構(gòu)和化學(xué)組分進(jìn)行表征,并測(cè)量了樣品的電學(xué)參數(shù)。結(jié)果表明：Y摻雜能有效降低室溫電阻,但過(guò)量的Y會(huì)在晶界處偏析,其與晶界上的Mn相互作用,削弱PTC效應(yīng)。通過(guò)晶粒和晶界的協(xié)同作用,可有效調(diào)控BaTiO3陶瓷的PTC效應(yīng)。

    Abstract:

    Y and Mn co-doped BaTiO3 ceramics were prepared by the conventional solid state reaction. The phases, microstructures and compositions of the prepared samples were characterized by X-ray diffractometer, scanning electron microscope and energy dispersive spectrometer, respectively, and the electrical parameters were measured. Results showed that the room temperature resistance of BaTiO3 could be effectively decreased by Y doping. However, the excessive Y would segregate at the grain boundary, which weakened the PTC effect of BaTiO3 ceramic, combined with Mn at the grain boundary. Through the coordinating behavior between grain and grain boundary, the PTC effect of BaTiO3 ceramic could be efficiently tailored.

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李智敏,丁愛(ài)宇,張茂林,閆養(yǎng)希,楊子,羅發(fā).晶粒與晶界對(duì)BaTiO3基陶瓷PTC效應(yīng)的協(xié)同調(diào)制研究[J].稀有金屬材料與工程,2018,47(8):2417~2421.[Li Zhimin, Ding Aiyu, Zhang Maolin, Yan Yangxi, Yang Zi, Luo Fa. Coordinating Control of the PTC Effect on BaTiO3 Based Ceramic by Grain and Grain Boundary[J]. Rare Metal Materials and Engineering,2018,47(8):2417~2421.]
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  • 收稿日期:2016-09-15
  • 最后修改日期:2016-11-14
  • 錄用日期:2016-12-02
  • 在線發(fā)布日期: 2018-10-17
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