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Thermal conductivit...
Thermal conductivity, heat capacity and phase stability of solid sodium chlorate (NaClO3) under pressure
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- Fransson, Åke (författare)
- Umeå universitet,Institutionen för fysik
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- Ross, Russel G. (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- 2000-11-24
- 1983
- Engelska.
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Ingår i: Journal of Physics C: Solid State Physics. - : Institute of Physics Publishing (IOPP). - 0022-3719. ; 16:15, s. 2861-2869
- 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
- The thermal conductivity, lambda, and the specific heat capacity at constant pressure, cp, have been measured for solid sodium chlorate (NaClO3) in the temperature range 100-300K. Differential scanning calorimetry (DSC) was used to measure cp at atmospheric pressure, whilst the transient hot-wire method was used to measure simultaneously both lambda and the heat capacity per unit volume, rho cp, up to a pressure of 2 GPa. We found that our measured DSC values of cp exceeded those previously predicted from a lattice dynamical model, consistent with a previous prediction of disorder in Cl atom positions at high temperatures. However, such disorder, if it exists, did not affect the transport of heat, since we found that lambda (T) under isochoric conditions appeared to be determined entirely by three-phonon umklapp interactions. We found no evidence for a phase transition in NaClO3 up to 2 GPa at 300K, contrary to some previous results. However, we did observe an explosive chemical instability to occur at about 1 GPa and 130K.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Thermal conductivity
- heat capacity
- specific heat
- phase stability
- explosive instability
- sodium clorate
- NaClO3
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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