Effect of sintering temperature on thermal stability of Zn_0.2Fe_1.05NiMn_0.75O₄ ceramic materials by homogeneous co-precipitation method

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• 作者：Xianxian Xie ; Junhua Wang ; Long Chen…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：190-196
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

The Zn_0.2Fe_1.05NiMn_0.75O₄ ceramic materials with different sintering temperatures are synthesized by homogeneous co-precipitation method. The effects of different sintering temperatures on the structure, electrical properties and stability of the ceramic materials are characterized by X-ray diffraction, scanning electron microscope, electrical measurement and impedance analysis. The results show the ceramic powders calcined at 800 °C can form a single cubic spinel structure NiFe₂O₄ phase, which exhibits great stability at sintering temperature from 1150 to 1300 °C. The values of B_25/50 constant, ρ₂₅ and Ea of Zn_0.2Fe_1.05NiMn_0.75O₄ ceramic samples at different sintering temperatures are in the range of 3786–3881 K, 84–134 KΩ cm and 0.327–0.335 eV, respectively. The values of relative resistance drift (ΔR/R₀) are in the range of 0.58–0.78 % and have a minimum at 1300 °C after aging test at 125 °C for 600 h. The Zn_0.2Fe_1.05NiMn_0.75O₄ ceramic materials are desirable for high stability thermistor applications.