Abstract
Changes of the bending strength σ and the lattice strain e of a glassy carbon manufactured by the carbonization of phenol-formaldehyde resin at 1000°C were examined in connection with the bulk density p and the crystallite size Lc in the heat treatment temperatures (HTT) ranging from 1000 to 2800°C for the heat treatment times (HTt) of 1h and 9h. The values of σ and p attained the maximum at cα. 1250°C, and the relationship of σ∝ρn was recognized. The exponent n has different values below and above 2000°C. The lattice strain e estimated from the (002) and (004) reflections by using the equation, cosθ/λ=K/Lc+2e·sinθ/λ, showed negative values, and decreased with the increase in Lc. The relationship, Lc·e=constant, was recognized. A significant effect of HTt on the values of Lc and e was confirmed at the HTTs above 1750°C but it is insignificant for the values of σ.
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