Thermal Diffusivity and Electrical Conductivity Studies of Polyaniline Based Materials and Selected Ceramics
In this work, the photoflash and four-point probe techniques were respectively applied for thermal diffusivity and electrical conductivity measurement on polyaniline, polyaniline blends, polyaniline composite and ceramic at room temperature. In the photoflash technique, the signal was initially...
محفوظ في:
| المؤلف الرئيسي: | |
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| التنسيق: | أطروحة |
| اللغة: | English English |
| منشور في: |
2003
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://psasir.upm.edu.my/id/eprint/9536/1/FSAS_2003_5_A.pdf |
| الوسوم: |
إضافة وسم
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| الملخص: | In this work, the photoflash and four-point probe techniques were respectively
applied for thermal diffusivity and electrical conductivity measurement on
polyaniline, polyaniline blends, polyaniline composite and ceramic at room
temperature.
In the photoflash technique, the signal was initially generated by a high intensity
camera flash as an excitation source. A fast response K -type thermocouple was used
as a detector to monitor the temperature at the rear surface of the sample. The
photoflash signal was captured as a function of time and the half rise time; t₀.₅ of
each sample was then analyzed to determine the thermal diffusivity. The photoflash
setup was first calibrated with the sample of known thermal diffusivity. The results
indicate that the thermal diffusivity of the calibration sample correlated well with the
results from literature. |
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