摘要
高熵氧化物陶瓷由于独特的结构及新奇的“高熵效应”而表现出优异的性能。为制得高灵敏度和高稳定性的NTC热敏电阻,采用固相反应法制备了(FeCoCrMnZn)_(3)O_(4)高熵热敏陶瓷,研究制备工艺对其物相组成、显微结构和电学性能的影响。结果表明:(FeCoCrMnZn)_(3)O_(4)粉体在900℃煅烧即可形成尖晶石结构的单相固溶体,(FeCoCrMnZn)_(3)O_(4)陶瓷中各元素均匀分布,符合高熵化特征,其室温电阻率高达142.5 kΩ·cm,热敏常数B值高达4487 K,而电阻漂移率仅为1.22%(1425℃,4 h)。总之,(FeCoCrMnZn)_(3)O_(4)高熵热敏陶瓷具有良好的NTC特性,较普通NTC热敏电阻而言,具有更高的电阻率、B值及稳定性,可用于抑制大功率电器产生的浪涌电流及温度的检测和控制等。
High entropy oxide ceramics exhibit good properties due to their unique structure and novel"highentropy effect".To prepare NTC thermistors with high sensitivity and stability,high entropy thermosensitive ceramics(FeCoCrMnZn)_(3)O_(4)were prepared by solid phase reaction method.The effects of the preparation process on the phase composition,microstructure and electrical properties were investigated for the high entropy thermosensitive ceramics.The(FeCoCrMnZn)_(3)O_(4)powders can be calcinated at 900℃to form single-phase spinel solid solution.For(FeCoCrMnZn)_(3)O_(4)ceramic,the elements are uniformly distributed in the grains,which is consistent with the characteristics of high entropy.High room temperature resistivity(142.5 kΩ·cm),high thermal sensitivity constant B value(4487 K)and low resistance drift rate(1.22%)were obtained for the reaction temperature at 1425℃for 4 h.Namely,the(FeCoCrMnZn)_(3)O_(4)high entropy thermistor has better NTC characteristics,higher resistivity,larger B value and better stability than those of the normal NTC thermistors,which can be used to suppress the surge current for high power electrical appliances and for temperature detection and control application.
作者
吴鹏程
梁炳亮
任剑怡
张乐
杨开怀
吴新根
WU Pengcheng;LIANG Bingliang;REN Jianyi;ZHANG Le;YANG Kaihuai;WU Xingen(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province,Nanchang 330063,China;School of Mechanical and Intelligent Manufacturing,Fujian Chuanzheng Communications College,Fuzhou 350007,China;Jiangxi Kingan Hi-Tech Co.,Ltd.,Nanchang 330508,China)
出处
《电子元件与材料》
CAS
北大核心
2023年第9期1079-1086,共8页
Electronic Components And Materials
基金
国家自然科学基金(51664043)
江西省金属材料微结构调控重点实验室(南昌航空大学)开放基金(EJ202101423)
国家留学基金委公派访问学者项目(201708360036)
南昌航空大学三小项目(2022CL052)
福建省高等职业院校应用技术协同创新中心建设项目(闽教科[2016]71号)。
关键词
高熵氧化物陶瓷
NTC热敏电阻
尖晶石结构
固相反应法
电学性能
high entropy oxide ceramics
NTC thermistors
spinel structure
solid-state reaction
electrical properties
