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Co-Mn-Ni-O₂系材料阻温特性与频率的关系

Relationship between Co-Mn-Ni-O₂ resistance temperature property and frequency

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【Author】 KANG Xue-ya1,Wang Tian-diao1,Zhang D2,Button T W2(1.Xinjiang Technical Institute of Physics and Chemistry,Chinese Academy of Sciences.Urumuqi 830011,China;2.Functional Materials Group,IRC in Materials Processing,School of Engineering,University of Birminghan,B15 2TT,UK)

【机构】中国科学院新疆理化技术研究所； Functional Materials Group IRC in Materials Processing； School of Engineering； University of Birminghan； B15 2TT； UK；乌鲁木齐830011；

【摘要】通过XRD、SEM分析和变温、变频条件下的logρ-t测量,对Co-Mn-Ni-O2系热敏材料的logρ-t特性与频率关系进行了研究。CoMn1.4Ni0.6O4尖晶石型氧化物热敏电阻材料的logρ-t特性在一定频率(0.1~1MHz)和温度范围(-70~100℃),发生了由正温度系数(PTC)向负温度系数(NTC)的转变,且转变点的温度(-70~-10℃)和频率(0.1~1MHz)与材料电阻率相关。根据电导率σ和载流子浓度n、载流子迁移率μ之间的关系,对导电机理作了初步的解释。更多还原

【Abstract】 By XRD 、SEM analysis and logρ-t measurement at alter temperature and alter frequency,resistance temperature characteristics of Co-Mn-Ni-O2 and frequency relationship were researched.In a range of frequencies(0.1～1MHz) and temperature(-70～100℃),the change of resistance-temperature characteristics is observed for spinel CoMn1.4Ni0.6O4 thermistor.The change of resistance-temperature characteristics is from PTC(positive temperature coefficient)to NTC(negative temperature coefficient).The temperature(-70～-10℃) and frequency(0.1～1MHz)of transform point are related with material resistivity.On the basis of the relationship of conductance σ、concentration of carrier n and mobility of carries μ,this phenomenon is preliminary explained.更多还原