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Sökning: WFRF:(Andersson Ove) > (1990-1994)

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  • Andersson, Ove, et al. (författare)
  • A low-temperature high-pressure apparatus with a temperature control system
  • 1992
  • Ingår i: High Pressure Research. - 0895-7959. ; 10:4, s. 599-606
  • Tidskriftsartikel (refereegranskat)abstract
    • A low-temperature high-pressure apparatus was designed using commercial cryogenic equipment. Pressures up to 1 GPa and temperatures down to 40 K can be obtained in a volume of up to 30 cm3. The apparatus is of the piston-cylinder type with a piston diameter of 45 mm, and the pressure can be varied at all temperatures, An adaptive temperature control system keeps the temperature inside the pressure cylinder constant to within ±0.1 K.
  • Sundqvist, Bertil, et al. (författare)
  • Structure, disorder, and phase diagram of C60 up to 1 GPa and below 300 K
  • 1994
  • Ingår i: High Pressure in Material Science and Geoscience : Proceedings of the XXXII Annual Meeting of the European High Pressure Research Group, Brno 1994. - Praha, Czech Republic : Prometheus. - 80-85849-93-3 ; s. 109-112
  • Konferensbidrag (refereegranskat)abstract
    • We have measured the compressibility and the thermal conductivity of C60 in the range below 300 K and up to 1 GPa (10 kbar). From the data obtained we have deduced the p-T phase diagram of C60. Literature data show that the ratio of pentagon-to-hexagon oriented molecules in the orientationally ordered phase decreases with increasing pressure, and from our data we conclude that C60 forms a new, completely "hexagon oriented" phase above 0.6 GPa at 150 K, or 1.2 GPa at 300 K. The glass transition temperature (90 K at atmospheric pressure) is found to increase by 54 K/GPa.
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