| 1. |
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| 2. |
- Alm, Ove, et al.
(författare)
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Thermal conductivity of NaCl up to 40 kbar and 240-400 K
- 1975
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 7:2, s. 235-239
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Tidskriftsartikel (refereegranskat)abstract
- The thermal conductivity, λ, of NaCl has been measured at pressures up to 40 kbar and temperatures between 240 K and 400 K in a solid medium in a 'belt' type of high-pressure apparatus. A steady state method with axial heating of a cylindrical specimen was employed. The increase of lambda with pressure was almost linear and the ratio of the thermal conductivity at 25 kbar to that at atmospheric pressure, λ(25)/λ(0), was found to be 1.72, and independent of temperature within the experimental error.
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| 3. |
- Alm, Ove, et al.
(författare)
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Thermal conductivity of NaF at high pressures
- 1979
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 11, s. 339-341
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Tidskriftsartikel (refereegranskat)abstract
- The thermal conductivity, λ, of NaF was measured over the pressure range 0-3 GPa at room temperature. An approximately linear variation of λ with P was observed in this range, and the ratio λ(P)/λ(0) was found to be 1.12 for P = 1 GPa.
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| 4. |
- Andersson, Per, et al.
(författare)
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Specific heat of solids at high pressures from simultaneous measurements of thermal conductivity and diffusivity
- 1972
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 4:1, s. 101-109
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Tidskriftsartikel (refereegranskat)abstract
- A method of determining the specific heat of solids at high pressures, from simultaneous measurements of thermal conductivity and diffusivity in a cylindrical geometry, is described. Results are reported for polytetrafluoroethylene (Teflon) in the range 0-30 kbar at 300 K. With increasing pressure both the thermal conductivity and diffusivity increase strongly and approximately linearly, while the specific heat decreases, most strongly at low pressures.
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| 5. |
- Andersson, Per
(författare)
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Thermal conductivity, heat capacity and phase diagram of furan under pressure
- 1980
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 12:6, s. 655-662
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Tidskriftsartikel (refereegranskat)abstract
- The thermal conductivity and heat capacity per unit volume of the solid phases of furan (C4H4O) have been measured by the hot-wire method in the ranges 120-300 K and up to 2.8 GPa. The results indicate that phases I and IV are plastic-crystal phases, and that there is considerable structural disorder in phase II. Thermal data suggest the existence of a low-temperature high-pressure phase, probably phase III, which is only slightly more ordered than phase II. The character of the III-IV transition is second-order.
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| 6. |
- Andersson, Per, et al.
(författare)
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Thermal conductivity of Teflon at high pressures
- 1975
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 7:5, s. 551-553
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Tidskriftsartikel (refereegranskat)abstract
- The thermal conductivity of different qualities of polytetrafluoroethylene, in the form of cylindrical specimens, was measured up to 3 GPa at room temperature by a steady-state method. A transient hot-wire method was also employed at pressures up to 1 GPa. With the exception of a recent investigation, reasonable agreement with previous work was obtained.
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| 7. |
- Brooks, R. F., et al.
(författare)
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Reliable data for high-temperature viscosity and surface tension : results from a European project
- 2001
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Ingår i: High Temperatures-High Pressures. - : Old City Publishing, Inc. - 0018-1544 .- 1472-3441. ; 33:6, s. 631-637
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Tidskriftsartikel (refereegranskat)abstract
- Results are reported of work carried out for the European Commission under contract number MAT1 CT 940006, between 1994 and 1998. The project provided recommended surface tension - temperature relationships for copper and nickel samples prepared by cold crucible melting to +/-3%, by the levitation and sessile drop methods, and values were also obtained for iron and gold in preliminary studies. For copper, (gamma /N m(-1)) = 1.304 - 0.289 x 10(-3)[(theta - 1083)/degreesC]; for nickel, (gamma /N m(-1)) = 1.781 - 0.285 x 10(-3)[(theta - 1455)/degreesC]. Comparison of terrestrial measurements with those made in microgravity have shown that the Cumming's equation is a reliable and satisfactory method of correcting the surface tensions derived with the levitated drop method for the effect of electromagnetic pressure. For measurements with an oscillating cylinder viscometer, recommended viscosity-temperature relationships are given for copper, nickel, and iron. For copper, log(10)(eta /mPa s) = -0.2791 + [1245.5/(T/K)]; for nickel, log(10)(q/mPa s) = -0.5038 + [2029/(T/K)]; and for iron, log(10)(eta /mPa s) = -0.6494 + [2568/(T/K)].
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| 8. |
- Bäckström, Gunnar
(författare)
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Thermophysical properties of solids under high pressure : a review
- 1985
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. - 9780850861242 ; 17:2, s. 185-199
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Tidskriftsartikel (refereegranskat)abstract
- Experimental methods of determining thermal conductivities under pressure are reviewed. A selection is made on the basis of viability and productivity. Methods applied at atmospheric pressure but potentially useful under high pressure are also mentioned. A condensed review of thermal conductivity results is given. Some methods for thermal conductivity also yield thermal diffusivity and heat capacity data. Specific methods of determining heat capacity are discussed, in particular those developed during the last five years. Results in this area mostly concern anomalies in heat capacity. Finally, various ways of determining thermal expansivities are discussed, especially indirect thermodynamic methods.
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| 9. |
- Egry, Ivan, et al.
(författare)
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Thermophysical properties of liquid Al-Ni alloys
- 2010
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 38:4, s. 343-351
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Tidskriftsartikel (refereegranskat)abstract
- Within the Integrated Project IMPRESS, funded by the EU, thermophysical properties of two Al-Ni alloys have been investigated: Raney-nickel (Al-31.5 at % Ni) and Al-25 at % Ni, corresponding to the intermetallic phase Al3Ni. Transition temperatures, latent heat, heat capacity, density and electrical resistivity were measured in the solid and liquid phases. In addition, surface tension and viscosity of the melts were also determined. All quantifies have been obtained as a function of temperature, in some eases also in the undercooled liquid. In this paper, we report on results obtained for the liquid phase using advanced container-based and containerless measurement methods. The obtained data yield a comprehensive characterisation of this technologically relevant class of alloys.
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| 10. |
- Egry, I., et al.
(författare)
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Thermophysical properties of liquid Al-Ni alloys
- 2009
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 38:4, s. 343-351
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Tidskriftsartikel (refereegranskat)abstract
- Within the Integrated Project IMPRESS, funded by the EU, thermophysi cal properties of two Al-Ni alloys have been investigated: Raney-nickel (Al-31.5at%Ni) and Al-25at%Ni, corresponding to the intermetallic phase Al3Ni. Transition temperatures, latent heat, heat capacity, density and electrical resistivity were measured in the solid and liquid phases. In addition, surface tension and viscosity of the melts were also determined. All quantities have been obtained as a function of temperature, in some cases also in the undercooled liquid. In this paper, we report on results obtained for the liquid phase using advanced container-based and containerless measurement methods. The obtained data yield a comprehensive characterisation of this technologically relevant class of alloys.
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