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Preparation and properties of fiber/NiFe_2O_4 composite ceramic inert anodes

MA Jia,YAO Guang-chun,CAO Zhuo-kun,HUA Zhong-sheng,WANG Lei,BAO Li,ZHANG Zhi-gang(School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China)  
Two-step sintering process was adopted to prepare fiber/NiFe2O4 composite ceramic inert anodes with copper-coated carbon fiber by solid-state reaction.NiFe2O4 spinel matrix material was prepared first using NiO,Fe2O3,trace V2O5 and MnO2 as raw materials.Then,fiber/NiFe2O4 composite ceramic inert anodes were prepared by cold pressing with sintering method using the above NiFe2O4 spinel matrix material and copper-coated carbon fiber as raw materials.The effects of addition of copper-coated carbon fiber on the bulk density,porosity and bending strength were studied.The results show that,the addition of copper-coated carbon fiber can significantly improve the properties of NiFe2O4 composite ceramic.The bulk density of the samples is improved by about 12% and the bending strength of samples is improved by about 22% with 3%(mass fraction) copper-coated carbon fiber.
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