A new pressure medium, Daphne 7676, with solidification pressure of 5 GPa at 300 K and low melting point of around 110 K at ambient pressure.
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| Title: | A new pressure medium, Daphne 7676, with solidification pressure of 5 GPa at 300 K and low melting point of around 110 K at ambient pressure. |
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| Authors: | Murata, K.1 (AUTHOR) murata.keizo@gmail.com, Goto, K.2 (AUTHOR), Klotz, S.3 (AUTHOR), Bhoi, D.4,5 (AUTHOR), Béneut, K.6 (AUTHOR), Uwatoko, Y.4,7 (AUTHOR), Yoshino, H.1 (AUTHOR), Aoki, S.2 (AUTHOR) |
| Source: | High Pressure Research. Jun2025, Vol. 45 Issue 2, p151-161. 11p. |
| Subjects: | Melting points, Critical temperature, Glass transitions, Solidification, Shear strength |
| Abstract: | A recently developed pressure medium 'Daphne 7676' increases considerably the solidification pressure (Ps) at room temperature from 3.7 GPa (Daphne 7474) and 4.0 GPa (Daphne 7575) to 5 GPa. Moreover, Daphne 7676 is found to show a viscosity more than one order of magnitude lower than the preceding materials. Even after solidified above 5 GPa, the medium appears to have exceptionally low shear strength, with evidence of some relaxations over time-scales of hours. Furthermore, at ambient pressure, Daphne 7676 is found to show freezing/melting temperature (Tm) of 113 K and a glass transition (Tg) at approximately 110 K. These values are considerably lower than for Daphne 7474, with Tm = 150 K and Tg = 140 K. Considering that 113 K is close to the critical temperature Tc (110 K) of Bi-high-Tc superconductors, for example, this fluid may have widespread applications in high pressure research but potentially also in bio and life-sciences. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | A recently developed pressure medium 'Daphne 7676' increases considerably the solidification pressure (Ps) at room temperature from 3.7 GPa (Daphne 7474) and 4.0 GPa (Daphne 7575) to 5 GPa. Moreover, Daphne 7676 is found to show a viscosity more than one order of magnitude lower than the preceding materials. Even after solidified above 5 GPa, the medium appears to have exceptionally low shear strength, with evidence of some relaxations over time-scales of hours. Furthermore, at ambient pressure, Daphne 7676 is found to show freezing/melting temperature (Tm) of 113 K and a glass transition (Tg) at approximately 110 K. These values are considerably lower than for Daphne 7474, with Tm = 150 K and Tg = 140 K. Considering that 113 K is close to the critical temperature Tc (110 K) of Bi-high-Tc superconductors, for example, this fluid may have widespread applications in high pressure research but potentially also in bio and life-sciences. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 08957959 |
| DOI: | 10.1080/08957959.2025.2506417 |
