A Comparison Study of Sinterability and Electrical Properties for Microwave and Conventional Sintered Mn_0.43Ni_0.9CuFe_0.67O₄ Ceramics

Xianjing Jin1,2), Aimin Chang1), Huimin Zhang1,2) and Dongyan Zhang1,2) 1) Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry, CAS, Urumqi 830011, China 2) Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

摘 要：In this paper, a quaternary system of Mn0.43Ni0.9CuFe0.67O4 negative temperature coefficient （NTC） thermistor ceramic prepared by solid/solid reaction was sintered by microwave and conventional method, respectively. To characterize the sinterability of the samples, the densification parameter, porosity and grain size distribution of the bulk were determined. The crystal structure, phase compositions, morphology and impedance of the samples were analyzed by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy-dispersive spectroscopy （EDS） and impedance analysis. The experimental results confirmed that the sinterability and electrical properties of ceramics were homogenously improved by microwave sintering.

关键词：