The high performance Mn1.2Co1.5Ni0.3O4 (MCN) ceramic materials are successfully fabricated using nanoparticles which are synthesized by the reverse microemulsion method. The morphology, crystal structure and particle size distribution of MCN nanoparticles are characterized by the XRD, SEM, TEM and HRTEM. The results show the well single tetragonal spinel structure and the narrow particle size distribution about 40 nm. As the sintering temperature increasing from 1000 to 1250 °C, all the MCN ceramic samples prepared by above-mentioned nanoparticles show the same single tetragonal spinel structure. The thermal sensitive properties with high values of ρ25, B25/100, Ea, and α25 of MCN ceramics at different sintering temperatures are in the range of 68,805–497,730 Ω cm, 4578–5159 K, 0.395–0.445 eV, and −5.2 to −5.8 %/K, respectively. These features indicate that the microstructure and electrical properties of MCN ceramics are relevant to the sintering temperature.
Electrical Resistivity Sinter Temperature Octahedral Site Nitrate Hexahydrate Negative Temperature Coefficient
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This work was supported by the One Hundred Talent Program of Chinese Academy of Sciences, the National High Technology Research and Development Program of China (Grant No. 2012AA091102), Chinese Academy of Sciences (Grant No. YZ201261), and the Talent Program of Xinjiang Uygur Autonomous Region.
1.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 and ChemistryChinese Academy of SciencesÜrümqiChina
2.University of Chinese Academy of SciencesBeijingChina
3.Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of ScienceSuzhouChina
4.Department of PhysicsChangji UniversityChangjiChina