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高居里點(diǎn)BiScO3-PbTiO3壓電陶瓷介電壓電性能研究
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國家自然科學(xué)基金(50472006);北京科技大學(xué)校基金


Dielectric and Piezoelectric Properties of BiScO3-PbTiO3 Piezoelectric Ceramics with High Curie Temperature
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    摘要:

    用通常的固相反應(yīng)法制備了(1–X) BiScO3-XPbTiO3(X=0.60, 0.62, 0.64, 0.66, 0.68)系壓電陶瓷,并對其進(jìn)行了微結(jié)構(gòu)和介電、壓電性能研究。XRD分析表明,該系統(tǒng)在PbTiO3摩爾分?jǐn)?shù)X=0.64時(shí),存在準(zhǔn)同相界,當(dāng)X小于0.64或大于0.64時(shí),陶瓷分別為菱方相和四方相結(jié)構(gòu)。相結(jié)構(gòu)在準(zhǔn)同相界的試樣具有最大的壓電常數(shù),其d33高達(dá)430 pC/N。介溫譜測試表明,該陶瓷體系居里溫度為450 ℃左右,具有弛豫鐵電體特征。

    Abstract:

    (1–X)BiScO3-XPbTiO3(X=0.60, 0.62, 0.64, 0.66, 0.68) piezoelectric ceramics were synthesized by a conventional solid-reaction method, and their microstructure and piezoelectric/dielectric properties were investigated. XRD results show that there is morphotropic phase boundary (MPB) when X=0.64, the samples are rombohedral phases when X<0.64, and tetragonal phases when X>0.64. The maximum piezoelectric constant of 430 pC/N is obtained with the MPB composition. The dielectric-temperature test results indicate that BiScO3-PbTiO3 system is relaxor ferroelectric and has a very high Curie temperature of 450 oC.

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郝俊杰,王曉慧,陳先中,李龍土.高居里點(diǎn)BiScO3-PbTiO3壓電陶瓷介電壓電性能研究[J].稀有金屬材料與工程,2011,40(4):705~707.[Hao Junjie, Wang Xiaohui, Chen Xianzhong, Li Longtu. Dielectric and Piezoelectric Properties of BiScO3-PbTiO3 Piezoelectric Ceramics with High Curie Temperature[J]. Rare Metal Materials and Engineering,2011,40(4):705~707.]
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  • 收稿日期:2010-04-30
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