Electrical and magnetic properties of NiCuZn–CaCu₃Ti₄O₁₂ composites doped with Bi₂O₃

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• 作者：Ying He ; Huaiwu Zhang ; Yunyan Wang ; Weiwei Ling ; Chunhong Mu ; Feiming Bai ; Peng Liu
• 关键词：Ceramics ; Composite ; Magnetic properties ; Dielectric properties
• 刊名：Journal of Alloys and Compounds
• 出版年：2010
• 出版时间：20 August 2010
• 年：2010
• 卷：504
• 期：2
• 页码：435-439
• 全文大小：894 K

文摘

Bi₂O₃ was used to promote grain growth and to improve magnetic and dielectric properties of NiCuZn ferrite–CaCu₃Ti₄O₁₂ composites during sintering. For a sintering temperature lower than 950 °C, the static permeability of the composites increases with the Bi₂O₃ content. Comparing with the composites without Bi₂O₃, the composite with Bi₂O₃ has a higher real permittivity and a lower loss tangent. With further increasing sintering temperature, it was found that the sample with 1 wt % Bi₂O₃ sintered at 1050 °C has the maximum static permeability, however, this was accompanied by an extremely high dielectric loss tangent. These results were analyzed in terms of the microstructures of the composites by scanning electron microscopy.