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首页> 外文期刊>Journal of Materials Science. Materials in Electronics >Electrical properties of BaTiO_(3)-based NTC thermistors doped by BaBiO_(3) and La_(2)O_(3)
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Electrical properties of BaTiO_(3)-based NTC thermistors doped by BaBiO_(3) and La_(2)O_(3)

机译：BaBiO_（3）和La_（2）O_（3）掺杂的BaTiO_（3）基NTC热敏电阻的电性能

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摘要

In our research it has been firstly found that BaTiO_(3) materials doped with BaBiO_(3) only show negative temperature coefficient effect over a wide temperature range. Major phases present in the sintered bodies are BaTiO_(3) compounds with a perovskite structure and BaBiO_(3) compounds with a monoclinic structure. Also, at a given BaTiO_(3) and BaBiO_(3) content, the influence of La_(2)O_(3) content on the microstructure and electrical properties has been investigated. The mean grain size of samples decreases with an increase in La_(2)O_(3) content. However the mean grain size remains unchanged with a further increase in La_(2)O_(3) content when the La_(2)O_(3) content in material is more than 0.20. As the amount of La_(2)O_(3) in BaTiO_(3)-based ceramics thermistors increases, the resistivity decreases to a minimum value and then slowly increases again.
机译：在我们的研究中，首先发现掺杂BaBiO_（3）的BaTiO_（3）材料仅在较宽的温度范围内显示负温度系数效应。存在于烧结体中的主要相是具有钙钛矿结构的BaTiO_（3）化合物和具有单斜晶结构的BaBiO_（3）化合物。同样，在给定的BaTiO_（3）和BaBiO_（3）含量的情况下，研究了La_（2）O_（3）含量对微观结构和电性能的影响。样品的平均晶粒尺寸随着La_（2）O_（3）含量的增加而减小。但是，当材料中的La_（2）O_（3）含量大于0.20时，随着La_（2）O_（3）含量的进一步增加，平均晶粒尺寸保持不变。随着基于BaTiO_（3）的陶瓷热敏电阻中La_（2）O_（3）的数量增加，电阻率减小到最小值，然后又缓慢增加。

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