Materials Reports  2021, Vol. 35 Issue (Z1): 56-58 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Effect of RuO2-doping on the Electrical Properties of Mn1.4Co1.5Zn0.1 Ceramics |
| YANG Jun1, HE Chuangchuang1, LUO Xiaofang2, SHANG Yong1, BAN Xiufeng1
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1 Yunke Electronic Co. Limited, Zhenhua Group, Guiyang 550018, China
2 Xinyun Electronic Co. Limited, Zhenhua Group, Guiyang 550018, China |
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Abstract Using Mn1.4Co1.5Zn0.1 as the staring materials,RuO2 as the dopants,xwt%RuO2(x=0,3,6,9,12,15)+Mn1.4Co1.5Zn0.1 NTC(negative temperature coefficient) thermistors were prepared by the solid-state reaction method.The microstructure and electric properties of the thermistors were studied. The results show that NTC thermistor with low resistivity and high B vaule can be obtained by doping RuO2. The B value and resistivity decrease rapidly with the increase of RuO2 doping amount.With the increase of sintering temperature,the resistivity decreases first and then increase, while the B value increase slowly.The sample shows a good NTC behavior when the sintering temperature is 1 130 ℃ and RuO2 doping amount is 15wt%,and its B value and ρ25 are 3 012 K and 32 Ω·cm .
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Published: 16 July 2021
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| Fund:Strong Foundation Enginering Project of Ministry of Industry and Information Technology(O714-EMTC-02-00869). |
| About author:: Jun Yang, an intermediate engineer of China Zhenhua Group Yunke Electronics Co., Ltd., obtained a master's degree from University of Electronic Science and Technology of China in 2016. He applied for 8 national invention patents and 3 of them were authorized, published 4 journal paper, undertook 4 provincial and mi-nisterial level projects, and won one third prize of provincial and ministerial level scientific and technological progress award. |
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