The conductivity, dielectric constant, magnetoresistivity, 1/f noise and thermoelectric power in percolating randomgraphite-- hexagonal boronnitride composites

[摘要] iiABSTRACTPercolation phenomena involving the electrical conductivity, dielectric constant,Hall coefficient, magnetoconductivity, relative magnetoresistivity, 1/ f noise and thermoelectric power are investigated in graphite (G) and hexagonal boron-nitride (BN)powder mixtures. Two kinds of systems are used in the experiments: highly compresseddiscs and parallelepipeds, cut from these discs, as well as 50%G-50%BN and 55%G-45%BN powder mixtures undergoing compression.The measured DC conductivities follow the power-laws 0(

[发布机构] University of the Witwatersrand