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In this work, the development of nanocomposites through the introduction of  nanoparticles into the matrix of CoSi is presented. CoSi was prepared through solid state reaction and different concentrations of  were introduced by mechanical grinding. The nanocomposites were fabricated via hot pressing and studied in terms of Seebeck coefficient, electrical and thermal conductivities at temperature range of 300-950K. Special emphasis was given to the reduction of the lattice thermal conductivity of nanocomposites and a comparative analysis with the effective medium theory was done to study the effect of  as well as porosity of the CoSi matrix.  

intermetallic compounds, thermoelectric materials, hot press, porosity.