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- W2945656333 abstract "• A new method is described to measure the heat capacity of samples in the presence of a gas under pressures up to 700 kPa. • Heat capacity measurements on calorimetric standard benzoic acid are reported in vacuum and under 690 kPa pressure. • The heat capacity measurements on benzoic acid in the sealed pans are in good agreement with previous measurements. We have developed a method for measuring the heat capacity of insulating powders as they interact with a gas under pressure. The method is suitable for pressures up to 700 kPa and temperatures from 1.8 K to 300 K. It is based on a previous technique for measuring the heat capacity of powders by compressing them into copper-encased pellets, and it is designed for use with a Physical Property Measurement System (PPMS) from Quantum Design. In the new method, the pellet is sealed in an aluminum DSC pan in a controlled atmosphere prior to the measurement. To determine the method’s accuracy, we measured the heat capacity of two samples of calorimetric standard benzoic acid. One sample was sealed in 690 kPa nitrogen gas and the other was sealed under vacuum. We conclude that the accuracy of the new method is comparable to that of standard measurements on samples not sealed in DSC pans." @default.
- W2945656333 created "2019-05-29" @default.
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- W2945656333 creator A5085599128 @default.
- W2945656333 date "2019-09-01" @default.
- W2945656333 modified "2023-10-13" @default.
- W2945656333 title "Low-temperature heat capacity measurements on insulating powders sealed under pressure" @default.
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- W2945656333 doi "https://doi.org/10.1016/j.jct.2019.05.009" @default.
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