| 溶胶-凝胶法制备高稳定性Mg_xNi_(1.0)Mn_(2-x)O_4系列热敏电阻 |
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| 引用本文： | 王疆瑛.溶胶-凝胶法制备高稳定性Mg_xNi_(1.0)Mn_(2-x)O_4系列热敏电阻[J].稀有金属材料与工程,2010(Z2). |
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| 作者姓名： | 王疆瑛 |
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| 作者单位： | 中国计量学院; |
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| 基金项目： | 浙江省重点科技计划项目(2007C21003)资助 |
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| 摘 要： | 采用溶胶-凝胶(Sol-Gel)技术制备MgxNi1.0Mn2-xO4(x=0,0.1,0.2,0.3,0.4)系列超细氧化物热敏粉体,并经成形,烧结等工艺制得性能优异的负温度系数热敏电阻。采用热分析系统、X射线衍射(XRD)仪、扫描电子显微镜(SEM)和HP34401型数字电压表分析MgxNi1.0Mn2-xO4氧化物热敏粉体的热处理过程、烧结体的显微结构和电性能。结果表明:在700℃热处理,得到尖晶石结构的MgxNi1.0Mn2-xO4氧化物热敏超细粉体。在空气气氛下,1200℃烧结2h,得到尖晶石结构的MgxNi1.0Mn2-xO4氧化物烧结体,烧结体显微结构致密。随着镁离子含量的增加,MgxNi1.0Mn2-xO4氧化物烧结体电阻值和材料常数增大,材料常数B≥3900,老化稳定性有很大提高。
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| 关 键 词： | 溶胶-凝胶法 MgxNi1.0Mn2-xO4 热敏电阻 高稳定性 |
Preparation of Mg_xNi_(1.0)Mn_(2-x)O_4 Thermistor with High Stability from Sol-Gel-Derived Powders |
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| Wang Jiangying.Preparation of Mg_xNi_(1.0)Mn_(2-x)O_4 Thermistor with High Stability from Sol-Gel-Derived Powders[J].Rare Metal Materials and Engineering,2010(Z2). |
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| Authors: | Wang Jiangying |
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| Affiliation: | Wang Jiangying (China Jiliang University,Hangzhou 310018,China) |
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| Abstract: | Homogeneous MgxNi1.0Mn2-xO4 gel was prepared by sol-gel process. Experimental results show that spinel phase formed at 600 oC. The MgxNi1.0Mn2-xO4 ceramics present typical XRD patterns of spinel polycrystalline structure and no secondary phase is detected at 1200 oC for 2 h. The grain size decreased with an increase in Mg content. In particular, the substituted Mg led to an increase in both the resistivity and the sensitivity index, the B25 oC/85 oC constant. The MgxNi1.0Mn2-xO4 ceramic samples has a sensit... |
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| Keywords: | sol-gel method MgxNi1 0Mn2-xO4 thermistor high stability |
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