Effects of Cd and Cd-Cu Doping on the Microstructure and Electrical Properties of NiMnCoO NTC Ceramics

Abstract:

The precursors of Cd_xNi_1-xCo_0.2Mn_1.8O₄ (x=0,0.1,0.2,0.3) and Cd_0.2Cu_0.1Ni_0.7Co_0.2Mn_1.8O₄ negative temperature coefficient (NTC) ceramics were prepared at room temperature by the solid reaction. These precursors were calcined and then sintered in air at 1100°C. Influence of the Cd and Cd-Cu doping on the microstructure and electrical properties of the NTC ceramics were investigated by X-ray diffraction and SEM technique. The results showed that Cd doping was conducive to reduce the grain size, increase density, and obtain high thermal stability.

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 1632-1635
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.1632
• Online since: May 2011
• Authors: Guo Na, Ya Dong Li
• Keywords: Cd and Cd-Cu Doping, Electrical Properties, NTC Ceramics, Spinel Phase

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