Measurement of the refining degree of bamboo charcoal by an alternating current method |
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Authors: | Yoshitaka Kubojima Youki Suzuki |
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Institution: | (1) Department of Chemical Engineering and biotechnology, National Taipei University of Technology, 1 Chunghsiao East Road, 3rd Section, Taipei, 10608, Taiwan;(2) Department of Raw Materials and Yarns, Taiwan Textile Research Institute, No.6, Chengtian Road, Tucheng City, Taipei County, 23674, Taiwan; |
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Abstract: | We investigated a method for measuring the refining degree of bamboo charcoal using an alternating current. The bamboo charcoal
was made under heating conditions of 400°–900°C (set temperature) and 0—3 h (holding time at each set temperature). The qualities
of the bamboo charcoal could not be estimated from the yield, and electric tests were required. The effect of the variation
in sample thickness on the impedance could be ignored. Attaching two plate electrodes to the same surface of a specimen enabled
high accuracy and practical use. The impedance was found to be a suitable index for estimating the refining degree of the
bamboo charcoal, such as the specific electric resistance. We believe that bamboo changes from an insulator to a conductor
suddenly when processed at 600°–750°C for 0–2 h. It is possible that the integral of temperature with time in a specimen during
heating is useful for approximately estimating impedance. |
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Keywords: | |
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