Investigations on gradient a.c. conductivity characteristics of bamboo (Dendrocalamus strictus) |
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Authors: | Navin Chand Deepak Jain Archana Nigrawal |
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Affiliation: | (1) Regional Research Laboratory (CSIR), 462 026 Bhopal, India |
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Abstract: | Effect of temperature and frequency variation on a.c. conductivity of bamboo was determined by using a 4274 A Multi-Frequencies
LCR meter. Electrical measurements were carried out in the temperature range 24–120°C and in the frequency range 4–100 kHz.
It was observed that the a.c. conductivity increased initially and then decreased with increase of temperature and frequencies.
The increase of distance from outer surface to the inner surface side increased the a.c. conductivity values and showed the
grading in a.c. conductivity behaviour. Two phases of a.c. conductivity behaviour with temperature exist in bamboo. At 10
mm distance a.c. conductivity suddenly increases which is the critical depth from skin for this bamboo. Increase of temperature,
at all the frequencies increases the a.c. conductivity initially and then decreases. Downward peaks in a.c. conductivities
are observed at all the frequencies due to the presence of moisture in bamboo, which liberated on heating. Sharp peak is observed
in case of sample 4, which is inner most strip. Maximum sharp peak is observed at lowest 4 kHz frequency. |
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Keywords: | a c conductivity bamboo gradient |
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