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Updated: Jul 1, 2026

Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
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Published on: August 15, 2015

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新型切片陶SrBi2Nb2-2WSnO9:晶体结构,微观结构和介电性质

Sergei V Zubkov1, Ivan A Parinov2, Alexander V Nazarenko1,3

  • 1Research Institute of Physics, Southern Federal University, Rostov-on-Don 344090, Russia.

Materials (Basel, Switzerland)
|September 28, 2024
PubMed
概括

研究人员通过用锡和替代来合成一种新陶,SrBi2Nb2-2xWxSnxO9. 用锡和进行兴奋剂改善了电物理性能,减少了损失,并增加了这种奥里维利乌斯-斯莫伦斯基相位材料的导电性.

关键词:
奥里维利乌斯-斯莫伦斯基阶段克里度温度 TC 克里度温度 TCSrBi2Nb2-2xWxSnxO9 (x=0.1,0.2,0.3,0.4) 的结果是没有一个.激活能量 Ea Ea Ea Ea Ea Ea Ea Ea Ea Ea Ea Ea Ea Ea相对允许度 ε/ε0

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Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
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Imperfections in Crystal Structure: Non-Stoichiometric Defects

Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...