Research on Preparation,Thermal Expansion and Electrical Property of Al/Y₂W₃O₁₂Composite

Composite material Al／Y₂W₃O₁₂was prepared by the solid-state method.The property of Al and Y₂W₃O₁₂synthesis at different mass ratios were researched.The X-ray diffraction indicates that the sample only contains Al and Y₂W₃O₁₂，no substitution of Y by Al.The analyses of SEM and EDS show that the sample was a structure where bulks of Al are embedded by little particles of Y₂W₃O₁₂.Thermal expansion and electrical conduction experiments indicate when the mass ratio was 7∶3 at temperature ranging from room temperature to 600℃，the sample has a linear thermal expansion coefficient of 14.76×10^-6／K，which is half that of Al(27.52×10^-6／K)，and a conductivity of 18.2 S／m，which is half that of Al(35.71 S／m).The research shows the low expansion coefficient and high electrical conductivity could relate to its unique structure.