Abstract
The thermoelectric power (TEP) of carbon fiber prepared by thermal decomposition of benzene at 1080°C was measured as functions of heat treatment temperature (HTT) and ambient temperature (Ta). The fiber shows somewhat similar dependences of TEP on HTT and Ta to those found in graphitizing carbons, which are in good agreement with Mrozowski's band scheme. When HTT comes up to 3000°C, the dependence of TEP on Ta approaches to that of a single-crystal graphite, indicating a high degree of crystallographic perfection of the fiber. Remarks about magneto-Seebeck effect of the fiber are discussed in relation to the imperfection originating from the fiber structure with cylindrical graphite planes.
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