J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (4): 344-350.

• Regular Papers • Previous Articles     Next Articles

A Comparison Study of Sinterability and Electrical Properties for Microwave and Conventional Sintered Mn0:43Ni0:9CuFe0:67O4 Ceramics

Jin Xianjing,chang aimin   

  • Received:2009-03-09 Revised:2009-04-28 Online:2010-04-30 Published:2010-04-28
  • Contact: Jin Xianjing
  • Supported by:

    the programs of seed money (No. K08141001) 
    the scientific problem tackling (No. G06211002) foundations of Urumqi in China

Abstract:

In this paper, a quaternary system of Mn0.43Ni0.9CuFe0.67O4 NTC thermistor ceramics prepared by solid/solid reaction were sintered by microwave and conventional method, respectively. In order 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 with XRD, SEM, EDS and impedance analysis. The experiment results confirmed that the sinterability and electrical properties of ceramics are homogenously improved by microwave sintering.

Key words: Microwave sintering, Mn0:43Ni0:9CuFe0:67O4, Sinterability, Electrical, Negative temperature coefficient (NTC)