抄録
The relationship, σ=aρn was recognized between bending strength (σ) and bulk density (ρ) of the heat-treated charcoals at various heat treatment temperatures (HTT) below 2500°C, and the exponent (n) was almost constant (n=1.3). Usually, the bending strength of carbon materials decreases by the proceeding of graphitization with temperature heat treatment. On the other hand, the bending strength of the bincho-tan manufactured by carbonization of oak (ubamegashi) ncreased with increasing HTT. The specific surface area of the powdered samples decreased with increasing HTT and converged to a value near 80m2/g at HTT 2500°C regardress of the different texture of charcoals. The small angle X-ray scattering (SAXS) data of the heat-treated charcoals showed that the micropores of R=10-50 nm (R Guinier radius) almost disappeared with high temperature treatment.
