Ren Wei, Liu Xianhai, Ding Shujian, Weng Xiang, Liu Guanghui, Wang Weili, Yang Yanhan
School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
School of Science, Xi'an University of Posts & Telecommunications, Xi'an 710121, China.
Materials (Basel). 2025 May 30;18(11):2571. doi: 10.3390/ma18112571.
NiMnO thermosensitive ceramics using BiO as a low-temperature ablating aid were prepared by laser melting deposition. Analyzing the structural, morphological, and electrical properties of the ceramics revealed important roles of BiO. The room-temperature resistance decreased gradually with the increasing of the BiO content, the thermal constant of the ceramics varied from 2870.1 to 3853.2 K, and the activation energy varied from 0.2473 to 0.3320 eV. Furthermore, the alleviation of the aging issue was attributed to the grain growth and the densification of the ceramics due to the addition of BiO and the corresponding cationic redistribution. As a result, an optimized resistance drifting (∆R/R = 5.72%) of the ceramic was obtained with the addition of BiO.
采用激光熔融沉积法制备了以BiO为低温烧蚀助剂的NiMnO热敏陶瓷。对陶瓷的结构、形态和电学性能进行分析，揭示了BiO的重要作用。室温电阻随BiO含量的增加而逐渐降低，陶瓷的热常数在2870.1至3853.2 K之间变化，活化能在0.2473至0.3320 eV之间变化。此外，老化问题的缓解归因于由于添加BiO以及相应的阳离子再分布导致的陶瓷晶粒生长和致密化。结果，添加BiO后陶瓷获得了优化的电阻漂移（∆R/R = 5.72%）。
