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首页> 外文期刊>Physica, B. Condensed Matter >Effect of temperature on the electrical properties of (WO_3 Co_2O_3) composite
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Effect of temperature on the electrical properties of (WO_3 Co_2O_3) composite

机译：温度对（WO_3 Co_2O_3）复合材料电性能的影响

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摘要

The composite with the mole ratio of WO_3 to Co_2O _3 being 3:1 was fabricated by the conventional solid-state reaction process. The electrical properties of the sample were measured at various ambient temperatures in a low electric field (E < 200V/mm). The results demonstrated that the electrical behavior of the composite was sensitive to the variation of the ambient temperature. As the temperature increased, the composite displayed negative differential resistance characteristic within the temperature range of about 50-130°C. When the temperature was between 140 and 300°C the composite exhibited sublinear electrical behavior where current rose more weakly than voltage, which is sharply unlike those in varistors. An obviously superlinear property, exploited in varistors, was observed at the temperature of 500°C. The present results also suggested that the composite did not obey the Arrhenius law. The current-voltage (I-V) properties of the composite could be explained by the double p-n junction and Joule heat.
机译：通过常规的固态反应工艺制备了WO_3与Co_2O_3的摩尔比为3：1的复合材料。在各种环境温度和低电场（E <200V / mm）下测量样品的电性能。结果表明，复合材料的电性能对环境温度的变化敏感。随着温度升高，复合材料在约50-130°C的温度范围内显示出负的差分电阻特性。当温度在140至300°C之间时，复合材料表现出亚线性电学行为，其中电流上升的幅度比电压弱得多，这与压敏电阻明显不同。在温度为500°C的情况下，在压敏电阻中发现了明显的超线性特性。目前的结果还表明该复合材料不符合阿伦尼乌斯定律。复合材料的电流-电压（I-V）特性可以通过双p-n结和焦耳热来解释。

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