アーク溶解および熱処理により作製したSiB_<14>-SiB_6系複合セラミックスの熱電性能 Thermoelectric Properties of SiB_<14>-SiB_6 Composites Prepared by Arc Melting and Annealing
Si-B system composites were prepared by arc melting using Si and B powders and then annealed in an argon atmosphere. Arc-melted specimens consisted of mainly SiB<SUB>14</SUB> and free Si. SiB<SUB>6</SUB> phase formed at the boundary between SiB<SUB>14</SUB> and free Si at content of 80 to 86mo1%B by the annealing at 1670K. The lattice parameter of SiB<SUB>14</SUB> increased with increasing annealing time due to the change of Si to B content ratio in SiB<SUB>14</SUB> phase. The electrical and thermal conductivity of the composites decreased with increasing annealing time, but the Seebeck coefficient (α) showed maxima at the annealing time around 5.4ks. The greatest dimensionless figure-of-merit (ZT) value obtained in this study was 0.14 at T=1100K.
粉体および粉末冶金 45(6), 581-585, 1998-06-15
Japan Society of Powder and Powder Metallurgy