Effectively control negative thermal expansion of single-phase ferroelectrics of PbTiO3-(Bi,La)FeO3 over a giant range.

Effectively control negative thermal expansion of single-phase ferroelectrics of PbTiO3-(Bi,La)FeO3 over a giant range.
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在大范围内有效控制 PbTiO3-(Bi,La)FeO3 单相铁电体的负热膨胀

DOI:
10.1038/srep02458
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Xing, Xianran
Xing, Xianran
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chen, Jun;Wang, Fangfang;Huang, Qingzhen;Hu, Lei;Song, Xiping;Deng, Jinxia;Yu, Ranbo;Xing, Xianran

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负热膨胀的控制是负热膨胀材料在未来的应用中一个非常有趣的课题。然而,在大范围内控制单个纯材料的负热膨胀是一个挑战。本文报道了一种通过调节PbTiO_3-(Bi,La)FeO_3铁电系统的自发体积铁电致伸缩(SVFS)来控制热膨胀系数从巨负到接近零的有效方法。热膨胀的可调范围包含大部分负热膨胀材料。根据目前提出的自发体积铁电致伸缩的新概念,可以很好地理解以前在铁电材料中观察到的负或零热膨胀的反常性质。本研究对控制铁电材料的热膨胀有一定的参考价值,并可推广到铁电、磁性与热膨胀相耦合的多铁性材料。
Control of negative thermal expansion is a fundamentally interesting topic in the negative thermal expansion materials in order for the future applications. However, it is a challenge to control the negative thermal expansion in individual pure materials over a large scale. Here, we report an effective way to control the coefficient of thermal expansion from a giant negative to a near zero thermal expansion by means of adjusting the spontaneous volume ferroelectrostriction (SVFS) in the system of PbTiO3-(Bi,La)FeO3 ferroelectrics. The adjustable range of thermal expansion contains most negative thermal expansion materials. The abnormal property of negative or zero thermal expansion previously observed in ferroelectrics is well understood according to the present new concept of spontaneous volume ferroelectrostriction. The present studies could be useful to control of thermal expansion of ferroelectrics, and could be extended to multiferroic materials whose properties of both ferroelectricity and magnetism are coupled with thermal expansion.
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发表时间: 1968-01-01
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