Low-temperature specific heat, thermal conductivity, and ultrasonic velocity of glassy carbons
โ Scribed by J. A. Katerberg; A. C. Anderson
- Publisher
- Springer US
- Year
- 1978
- Tongue
- English
- Weight
- 361 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0022-2291
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โฆ Synopsis
We have measured the specific heat (0.1 <T< I K) and thermal conductivity (O.O7<T<300 K) of two glassy carbons, one pyrolysed at lOOO"C, the other at 2500ยฐC. The temperature dependence of ultrasonic velocity (0.2-300K) was also measured on the 2500ยฐC material. The above properties are remarkably similar to those of amorphous materials, yet it appears that these features arise from origins other than the localized excitations responsible for the low-temperature behavior of amorphous materials.
๐ SIMILAR VOLUMES
The specific heat of glassy carbon was investigated in the temperature range of 0\*44-4\*5"K. The specific heat follows a relation C = aT3+ yT, with y going through a ma~mum and a! increasing with increase in heattreatment temperature. On the average the cubic specific heat term is about the same as
The specific heat of glassy carbon was investigated in the temperature range of 0\*44-4\*5"K. The specific heat follows a relation C = aT3+ yT, with y going through a ma~mum and a! increasing with increase in heattreatment temperature. On the average the cubic specific heat term is about the same as