Structure and electromagnetic properties of cellular glassy carbon monoliths with controlled cell size

doi:10.3390/ma11050709

Эндаумент фонд ТГУ!
Впиши своё имя в историю университета
- Сделать пожертвование -

Add to "Quick Collection"

Description	Size	Format
Structure and electromagnetic properties of cellular glassy carbon monoliths with controlled cell size	5 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/ma11050709

#электрическая проводимость

#диэлектрическая проницаемость

#электромагнитные свойства

#сотовые монолиты

#пористость

#стеклообразный углерод

Title: Structure and electromagnetic properties of cellular glassy carbon monoliths with controlled cell size
Creator: Fierro, Vanessa
|
Plyushch, Artem O.
|
Macutkevic, Jan
|
Kuzhir, Polina P.
|
Celzard, Alain
|
Szczurek, Andrzej
Date: 2018
DOI: 10.3390/ma11050709
Description: Electromagnetic shielding is a topic of high importance for which lightweight materials are highly sought. Porous carbon materials can meet this goal, but their structure needs to be controlled as much as possible. In this work, cellular carbon monoliths of well-defined porosity and cell size were prepared by a template method, using sacrificial paraffin spheres as the porogen and resorcinol-formaldehyde (RF) resin as the carbon precursor. Physicochemical studies were carried out for investigating the conversion of RF resin into carbon, and the final cellular monoliths were investigated in terms of elemental composition, total porosity, surface area, micropore volumes, and micro/macropore size distributions. Electrical and electromagnetic (EM) properties were investigated in the static regime and in the Ka-band, respectively. Due to the phenolic nature of the resin, the resultant carbon was glasslike, and the special preparation protocol that was used led to cellular materials whose cell size increased with density. The materials were shown to be relevant for EM shielding, and the relationships between those properties and the density/cell size of those cellular monoliths were elucidated.