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Studying the porosity of graphite foil with different densities: pore space model and gas permeabilityстатья
- Авторы: Yurkov A.L., Malakho A.P., Иванов Андрей Владимирович, Chernova E.A., Belogorlov A.A., Avdeev V.V.
- Журнал: Journal of Materials Science
- Год издания: 2022
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- DOI: 10.1007/s10853-022-07677-9
- Аннотация: The study is aimed to deepen the understanding of the relationship between density, open and closed porosity as well as gas permeability of compressed graphite foils with a density from 0.5 to 1.8 g∙cm-3 designed especially for sealing. The pore structure of the graphite foil samples is experimentally measured by several complementary methods: low-temperature N2 adsorption, mercury porosimetry, and gas permeability. A comparative study of the porosity obtained by mercury porosimetry, as well as by saturation with water and isopropanol, made it possible to propose a reliable express method for controlling the porosity of dense graphite foil. Characteristic pore size and open porosity of graphite foil decreases when increasing its density from 0.5 to 1.8 g∙cm-3. Gas permeability also decreases when decreasing porosity of the foils. Based on gas permeability depending on material density and gas pressure average capillary diameter, number of capillaries, effective cross-sectional area of capillaries were calculated. These data were applied for describing the pore structure of graphite foil and explanation of its low gas permeability.Key Words: Porosity, gas permeability, specific surface area, graphite foil, mercury porosimetry, low-temperature nitrogen adsorption, capillary structure.
- Добавил в систему: Иванов Андрей Владимирович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Studying_the_porosity_of_graphite_foil_with_different_densi… | 2,3 МБ | 25 ноября 2022 [IvanovAV021091] |