Study On Preparation And Mechanical Properties Of NiFe₂O₄ Nanometer Cermet

At present the costs in the electrolytic industrial production are high,and cause the serious pollution,the problem of low efficiency.With the pace of building for the world-saving and environment-friendly society to accelerate,Inert anode materials research and development become the hot focus of electrolytic technology development。This paper status the current development of electrolytic industrial,track the latest research material inert anode dynamic at home and abroad,and fund NiFe₂O₄ that has a ceramic chemical stability,corrosion resistance, high temperature and other characteristics,As it can meet the requirements of electrolytic inert anode,However,the brittle ceramic greatly limit its application。In this paper,the research objectives through the addition of nano-NiO,fund NiFe₂O₄ is to improve the mechanical properties of ceramics,and to solve the inert anode and large machining and other projects problems。In this study,materials for the NiO,Fe₂O₃,Cu and nano-NiO,using of ultrasound technology spread with star ball milling of raw materials,using one methods of suppressing the metal-ceramic inert anode green,and pressure for the suppression of 8 MPa,and the inert anode sample sintering 1100℃be qualified in the atmosphere air。After XRD tests and calculations the sample of nano-metallic ceramic NiFe₂O₄,indicate that components of NiFe₂O₄,CuFe₂O₄,NiO,CuO。Music by Scherrer formula,testified the sample is nano-NiFe₂O₄ cermet.On the nano-NiFe₂O₄ mechanical properties of metals research,the Vicker hardness of the adding nano-NiO greatly reduced than the sample not adding,the bending strength and fracture toughness have significantly improved。Through the micro-structure observations,the nano-NiO and the materials of ceramic NiFe₂O₄ have a good combination,formation the inter-nano-crystalline,thereby inhibiting the NiFe₂O₄ grain in the process of sintering and the growth of abnormal growth of grain NiFe₂O₄, crystal fracture occurred along the crystal,illuminating nano-NiO played a-ceramic materials to improve the role of the mechanical properties。...