BaVO陶瓷的复阻抗光谱特性

4区材料科学 Q2 Engineering

Advances in Materials Science and Engineering Pub Date : 2008-03-13 DOI:10.1155/2008/746256

P. Khatri, B. Behera, V. Srinivas, R. Choudhary

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引用次数: 25

摘要

采用高温固相反应法制备了Ba3V2O8多晶样品。利用阻抗分析仪在宽频率范围(102 ~ 106 Hz)研究了温度对阻抗参数的影响。复阻抗的实部和虚部在复平面上走半圆。温度依赖性图显示，体积和晶界效应在125°C以上都存在。材料的体电阻随温度的升高而减小。这显示了材料典型的负电阻温度系数(NTCR)行为。模量分析表明材料的电输运过程可能存在跳跃机制。直流电导率变化的性质表明电导率属于阿伦尼乌斯型。

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Complex Impedance Spectroscopic Properties of BaVO Ceramics

The polycrystalline sample of Ba3V2O8 was prepared by a high-temperature solid-state reaction technique. The effect of temperature on impedance parameters was studied using an impedance analyzer in a wide frequency range (102-106 Hz). The real and imaginary parts of complex impedance trace semicircles in the complex plane. The temperature-dependent plots reveal the presence of both bulk and grain boundary effects above 125∘C. The bulk resistance of the material decreases with rise in temperature. This exhibits a typical negative temperature coefficient of resistance (NTCR) behavior of the material. The modulus analysis suggests a possible hopping mechanism for electrical transport processes of the material. The nature of variation of dc conductivity suggests the Arrhenius type of electrical conductivity.

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来源期刊

Advances in Materials Science and Engineering Materials Science-General Materials Science

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Advances in Materials Science and Engineering is a broad scope journal that publishes articles in all areas of materials science and engineering including, but not limited to: -Chemistry and fundamental properties of matter -Material synthesis, fabrication, manufacture, and processing -Magnetic, electrical, thermal, and optical properties of materials -Strength, durability, and mechanical behaviour of materials -Consideration of materials in structural design, modelling, and engineering -Green and renewable materials, and consideration of materials’ life cycles -Materials in specialist applications (such as medicine, energy, aerospace, and nanotechnology)