在 (1 - x) PbTiO ((3) - xBiBi ((Ni ((1/2) Ti ((1/2)) O ((3)) 中的热膨胀,铁电和磁性特性
Penghao Hu1, Jun Chen, Jinxia Deng
1Department of Physical Chemistry, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China.
Journal of the American Chemical Society
|January 26, 2010
概括
研究人员通过化学修饰酸开发了一种具有接近零的热膨胀的新型多铁化合物. 这种材料表现出增强的压电性,铁电性和机械性质,使其适用于高性能应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 多铁性材料 多铁性材料
背景情况:
- 基于酸 (PbTiO3) 的材料因其压电和铁电特性而受到广泛研究.
- 开发具有可调节的热膨胀和多铁特性的材料对于先进的应用至关重要.
研究的目的:
- 合成和描述一种具有接近零的热膨胀的新型多铁化合物.
- 为了研究 (1 - x) PbTiO3-xBi ((Ni ((1/2) Ti ((1/2)) O3固体溶液的结构,电,磁和机械性能.
主要方法:
- 材料合成的化学修饰路径.
- 用X射线衍射进行结构分析.
- 测量热膨胀系数的方法.
- 铁电,压电和磁性属性的评估.
主要成果:
- 一种 (1 - x) PbTiO3-xBi(Ni(1/2) Ti(1/2)) O3 的固体溶液已经成功开发出来.
- 四角性下降,导致接近零的热膨胀 (从-8.81 x 10^-6/°C到8.46 x 10^-6/°C).
- 观察到微弱的铁磁性,以及保留的压电和铁电.
- 实现了优良的机械性能,包括高密度和断裂性.
结论:
- 开发的 (1 - x) PbTiO3-xBi(Ni(1/2) Ti(1/2)) O3陶展示了多铁行为,接近零的热膨胀和优越的机械性能的有希望的组合.
- 这些材料适用于需要热稳定的高性能压陶应用.
- 该研究提出了一个可行的策略,用于设计先进的多铁化合物.
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