S. Takeda et al., THERMOELECTRIC PROPERTIES OF POROUS BETA- SIC FABRICATED FROM RICE HULL ASH, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 101(7), 1993, pp. 814-818
Beta-SiC powder was synthesized by carbothermal reduction of silica co
ntained in rice hull ash, and porous ceramics were fabricated by conve
ntional sintering. Electrical conductivity and Seebeck coefficient wer
e measured as functions of temperature under Ar atmosphere to evaluate
their applicability to thermoelectric energy conversion. Thermoelectr
ic properties of beta-SiC ceramics fabricated from rice hull ash were
comparable to those fabricated from a commercial high-purity powder.