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Characterizing the state of water in an amorphous magnesium carbonate using Dielectric spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In the industry of today, materials which can adsorb and hold large amounts of water are playing an important role. Here, the free and bound water carrying capacity of an amorphous magnesium carbonate is investigated. It is also determined how these parameters depend on the relative humidity of the surrounding environment. To do this, the technique of dielectric spectroscopy is employed. Along with the water binding properties, the concentration of charge carriers and the diffusion coefficient was determined. A smaller part of around 10-30 % of the water adsorbed was shown to behave as free water in the material. The concentration of charge carriers was calculated to be in an order of magnitude of 1018-1022 m-3 for the higher relative humidity environments. The diffusion coefficient was shown to be about 5*10-9 m2/s for the adsorption spectrum. This value is in good agreement with the value for OH- ions in water.

Place, publisher, year, edition, pages
2013. , 26 p.
Series
UPTEC F, ISSN 1401-5757 ; 13015
Keyword [en]
material physics, nanotechnology, amorphous materials, water binding
Keyword [sv]
materialfysik, nanoteknologi, amorfa material, vattenbindning
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:uu:diva-200931OAI: oai:DiVA.org:uu-200931DiVA: diva2:625407
Educational program
Master Programme in Engineering Physics
Presentation
2013-05-30, Ångström 2002, Lägerhyddsvägen 1, Uppsala, 15:15 (English)
Uppsok
Technology
Supervisors
Examiners
Available from: 2013-07-04 Created: 2013-06-04 Last updated: 2013-07-04Bibliographically approved

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Characterizing the state of water in an amorphous magnesium carbonate using Dielectric spectroscopy, Olle Ahlström(604 kB)398 downloads
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