TY - JOUR
T1 - New negative temperature coefficient thermistor ceramics in Mn-doped CaCu3-xMnxTi4O12 (0≤x≤1) system
AU - Zhang, Bo
AU - Zhao, Qing
AU - Chang, Aimin
AU - Ye, Haitao
AU - Chen, Shi
AU - Wu, Yiquan
PY - 2014/8
Y1 - 2014/8
N2 - New negative temperature coefficient (NTC) ceramics based on CaCu 3-xMnxTi4O12 (0≤x≤1) compositions have been investigated. The grain size of the CaCu 3-xMnxTi4O12 samples decreases at first and then increases with increasing Mn content. The X-ray photoelectron spectroscopy analysis corroborates the presence of Mn3+ and Mn 4+ in Mn-doped samples, which results in a decrease in the activation energy. All the NTC thermistors prepared show a linear relationship between the natural logarithm of the resistivity and the reciprocal temperature, indicative of NTC characteristics. The Mn-doped CaCu3-xMnxTi 4O12 NTC thermistors provide various electrical properties, depending on Mn content. The values of ρ25, B constant and activation energy of the NTC thermistors are in the range of 2.22×106-3.22×108 Ω cm, 5488-8031 K, and 0.473-0.692 eV, respectively.
AB - New negative temperature coefficient (NTC) ceramics based on CaCu 3-xMnxTi4O12 (0≤x≤1) compositions have been investigated. The grain size of the CaCu 3-xMnxTi4O12 samples decreases at first and then increases with increasing Mn content. The X-ray photoelectron spectroscopy analysis corroborates the presence of Mn3+ and Mn 4+ in Mn-doped samples, which results in a decrease in the activation energy. All the NTC thermistors prepared show a linear relationship between the natural logarithm of the resistivity and the reciprocal temperature, indicative of NTC characteristics. The Mn-doped CaCu3-xMnxTi 4O12 NTC thermistors provide various electrical properties, depending on Mn content. The values of ρ25, B constant and activation energy of the NTC thermistors are in the range of 2.22×106-3.22×108 Ω cm, 5488-8031 K, and 0.473-0.692 eV, respectively.
KW - C. electrical properties
KW - D. Perovskites
KW - NTC thermistors
KW - CaCu3Ti4O12
UR - http://www.scopus.com/inward/record.url?scp=84900468854&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2014.03.165
DO - 10.1016/j.ceramint.2014.03.165
M3 - Article
AN - SCOPUS:84900468854
SN - 0272-8842
VL - 40
SP - 11221
EP - 11227
JO - Ceramics International
JF - Ceramics International
IS - 7 Part B
ER -