粒径对Mn 1.1Co 1.5Fe 0.4O 4陶瓷结构和电性能的影响

EnergyRN: Electrochemical Energy Engineering (EnergyRN) (Topic) Pub Date : 1900-01-01 DOI:10.2139/ssrn.3610482

Bing Wang, Aimin Chang, Junhua Wang, Jincheng Yao

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引用次数: 0

摘要

以微米级和纳米级颗粒为原料，采用固相反应法制备了致密的Mn1.1Co1.5Fe0.4O4陶瓷。结果表明:随着纳米颗粒含量的增加，烧结陶瓷的晶粒尺寸逐渐减小;有趣的是，当使用所有纳米级颗粒时，晶粒表面呈现凹片状。特别是晶界的阻力和氧空位的迁移分别增加了电阻率和时效系数。本研究表明，利用不同粒度的原料来调节结构和电性能是一种有用的方法。

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Influence of Particle Size on the Structural and Electrical Properties of Mn 1.1Co 1.5Fe 0.4O 4 Ceramics

Dense Mn_1.1Co_1.5Fe_0.4O₄ ceramics are successfully synthesized by using micron- and nano-sized particles as raw materials in a solid-state reaction method. The results show that the grain sizes of the as-sintered ceramics decreased with the increasing amounts of nano-sized particles. Interestingly, the grain surface presents concave flakes when all nano-sized particles are used. In particular, the resistance of the grain boundaries and the migration of oxygen vacancies increased the resistivity and aging coefficient, respectively. This study indicates that it's a useful approach to modulate the structural and electrical properties by using the different particle sizes of raw materials.

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EnergyRN: Electrochemical Energy Engineering (EnergyRN) (Topic)

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