A novel(Sm_(0.2)Eu_(0.2)Gd_(0.2)Ho_(0.2)Yb_(0.2))CrO_(3)high-entropy ceramic nanofiber as a negative temperature coefficient thermistor  

作　　者：Weijun Zhao Meng Zhang Liyan Xue Kaixian Wang Fan Yang Jiuping Zhong Heng Chen 

机构地区：[1]School of Materials,Sun Yat-sen University,Shenzhen,518107,China [2]Xiamen Institute of Rare Earth Materials,Haixi Institute,Chinese Academy of Sciences,Xiamen,361021,China [3]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen Institute of Rare Earth Materials,Haixi Institute,Chinese Academy of Sciences,Xiamen,361021,China [4]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou,350108,China [5]Advanced Energy Science and Technology Guangdong Laboratory,Huizhou,516003,China [6]Sichuan Jcc Rare Earth Metals New Material Co.,Ltd.Chengdu,610000,China

出　　处：《Journal of Rare Earths》2024年第10期1937-1942,共6页稀土学报（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(2019YFC0605000);the"Transformational Technologies for Clean Energy and Demonstration",Strategic Priority Research Program of the Chinese Academy of Sciences(XDA21000000);the Independent Deployment Project of Ganjiang Innovation Research Institute of Chinese Academy of Sciences(E055A002);the Independent Deployment Project of China Fujian Innovation Laboratory of Optoelectronic Information Technology(2021ZZ109);the Fujian Provincial Natural Fund(2021J05101);the National Natural Science Foundation of China(21771196,62275276);Advanced Energy Science and Technology Guangdong Laboratory(HND20TDGFDC00)。

摘　　要：The electrical properties of high-entropy ceramics(HECs)have been extensively studied in recent years due to their unique structural characteristics and fascinating functional properties induced by entropy engineering.Novel high-entropy(Sm_(0.2)Eu_(0.2)Gd_(0.2)Ho_(0.2)Yb_(0.2))CrO_(3)(HE-RECrO_(3))nanofibers were prepared by electro spinning.This work demonstrates that HE-RECrO_(3)nanofibe rs were successfully synthesized at a low temperature(800℃),which is approximately 400℃lower than the temperatures at which chromate ceramics were synthesized via the sol-gel method and the solid-state reaction method.The resistivity of HE-RECrO_(3)nanofibers decreases exponentially with increasing temperature from 25 to600℃.The logarithm of the resistivity is linearly related to the inverse of the temperature,confirming the negative temperature coefficient property of HE-RECrO_(3)nanofibers.The B_(25/50)value of the HERECrO_(3)nanofibers reaches 4072 K.In conclusion,HE-RECrO_(3)nanofibers are expected to be potential candidates for negative-temperature-coefficient(NTC)thermistors.

关 键 词：Rare earths High-entropy ceramics Ceramic fiber materials Negative temperature coefficient thermistors 

分 类 号：TQ174.1[化学工程—陶瓷工业]