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Heat capacity and t...
Heat capacity and thermal conductivity from pulsed wire probe measurements under pressure
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- Sandberg, Olov (författare)
- Umeå universitet,Institutionen för fysik
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- Andersson, Per (författare)
- Umeå universitet,Institutionen för fysik
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- Bäckstrom, Gunnar (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- 2001-02-08
- 1977
- Engelska.
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Ingår i: Journal of Physics E: Scientific Instruments. - : Institute of Physics Publishing (IOPP). - 0022-3735. ; 10:5, s. 474-477
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- If a metal wire immersed in an electrically insulating medium is heated by a known constant power, the thermal conductivity of the medium may be deduced from the temperature variation of the wire. In this work it is shown that further analysis of this variation also permits the specific heat capacity or the thermal diffusivity to be determined. A nickel wire is used both as a heater and as a temperature sensor. The power is kept constant by electronic means, and the resistance measured by a four probe technique. Eight temperature values are recorded during the power pulse, which has a typical duration of 1 s. Data acquisition and calculation of thermal conductivity and specific heat capacity are carried out automatically using a desk calculator. This extended method has been tested by studying glycerol in its amorphous and crystalline states in the range 130-300 K and at pressures of up to 0.8 GPa.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Heat capacity
- specific heat
- thermal conductivity
- thermal diffusivity
- pulse method
- dynamic method
- hot-wire method
- high pressure
- glycerol
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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