Liu Ting, Yang Guanghua, Ma Juan, Zhang Huimin, Zhang Min, Chang Aimin
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, China.
Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi, China.
Front Chem. 2023 Sep 29;11:1275274. doi: 10.3389/fchem.2023.1275274. eCollection 2023.
The development of negative temperature coefficient (NTC) thermistor materials with a wide range of operating temperatures, high resistance (R), low thermal content (B) and good stability is significant for improving the overall performance of NTC thermistors. Traditional NTC thermistors materials are of the spinel, however, their practical applications are commonly limited to temperatures below approximately 200°C.In this study, it was found that a novel perovskite-structured solid solution (1-x)BiSrLaTiO-xLaMnO (0.05 ≤ ≤ 0.2) (BSLT-LM) showed good NTC performance from room temperature to high temperature (600°C) due to the stable structure at high temperatures. The ρ, ρ, ρ and B, B constants of BiSrLaTiO-0.1LaMnO NTC thermistors are approximately 1.76 × 10 Ω cm, 1.13 × 10 Ω cm, 9.89 × 10 Ω cm, 4063.91 K, 5472.34 K, respectively. The electrical conductivity of these solid solution refers to the electronic transition between Mn and Mn, and oxygen vacancies. These results demonstrate the tremendous potential of perovskite-structured (1-x) BiSrLaTiO-xLaMnO thermistor ceramics with NTC performance.
开发具有宽工作温度范围、高电阻（R）、低热容（B）和良好稳定性的负温度系数（NTC）热敏电阻材料对于提高NTC热敏电阻的整体性能具有重要意义。传统的NTC热敏电阻材料是尖晶石型的，然而，它们的实际应用通常限于大约200°C以下的温度。在本研究中，发现一种新型的钙钛矿结构固溶体（1-x）BiSrLaTiO-xLaMnO（0.05≤x≤0.2）（BSLT-LM）由于在高温下结构稳定，从室温到高温（600°C）都表现出良好的NTC性能。BiSrLaTiO-0.1LaMnO NTC热敏电阻的ρ、ρ、ρ和B、B常数分别约为1.76×10Ω·cm、1.13×10Ω·cm、9.89×10Ω·cm、4063.91K、5472.34K。这些固溶体的电导率指的是Mn和Mn之间的电子跃迁以及氧空位。这些结果证明了具有NTC性能的钙钛矿结构（1-x）BiSrLaTiO-xLaMnO热敏电阻陶瓷具有巨大的潜力。
