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Linear electrical behavior NTC ceramics over a broad temperature range enabled by ionic conduction suppression

delete2025-08-26
delete0
PRE
AI
Z
Zhenlin Song
Z
Zengji Chen
郭
郭益平 (Yiping Guo) *
DOI：10.1016/j.ceramint.2025.08.355delete
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摘要

摘要

En 中文
随着汽车电池技术的快速进步，对高温监测的需求日益增长。目前，基于钙钛矿的负温度系数（NTC）热敏电阻（Y2O3-Y(Cr0.5Mn0.5)O3）可实现最高1000 °C的温度测量，但铬的挥发导致热敏性能不稳定，且导电机制尚未得到研究。本研究表明，铬通过产生铬空位来调控锰离子的价态。然而，空位的增加促进了离子导电，导致热敏电阻常数B值在高温下升高，并降低了老化稳定性。因此，我们设计了Y2O3-Y(Ni,Mn)O3 NTC陶瓷。用低价镍替代铬有效调整了Mn3+/Mn4+的比例，促进了小极化子跳跃导电并抑制了离子导电。该方法有助于在宽温度范围（25–1000 °C）内保持稳定的B值，并增强老化稳定性。制备的NTC陶瓷在高温监测领域展现出应用潜力。

期刊

Ceramics International 封面图
Ceramics International
IF:
5.6
论文数:
5.1W
被引数:
15.5W

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