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Triboelectric charge characteristics and donor-acceptor, acid-base properties of minerals: are they related?
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2001 (English)In: Particulate Science and Technology, ISSN 0272-6351, E-ISSN 1548-0046, Vol. 19, no 1, p. 23-43Article in journal (Refereed) Published
Abstract [en]

The tribo/contact electrification theory of materials is envisaged from the chemical Lewis acid-base concept and an attempt has been made to find a correlation between these two phenomena. The donor-acceptor/acid-base properties of apatite, calcite, feldspar, quartz and wollastonite mineral samples have been determined by electrokinetic studies in water and in different organic solvents having different donicity values. From the results, the donicity values for mineral samples were defined and the position of Fermi level in the forbidden gap energy was estimated. The charge acquired by a single mineral particle of varying sizes was determined after contacting with plate and cyclone type tribochargers made up of different materials. The work functions of the mineral samples were estimated. The results showed a good correlation between the physical tribo-electrification process and the chemical acceptor-donor property of the minerals. The results also demonstrate the feasibility of arranging the minerals into triboelectric series and thereby to predict their triboelectric charge characteristics and their separation behavior in an electric field with reference to a particular tribocharger medium

Place, publisher, year, edition, pages
2001. Vol. 19, no 1, p. 23-43
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-10827Local ID: 9b451d30-a9bb-11de-8293-000ea68e967bOAI: oai:DiVA.org:ltu-10827DiVA, id: diva2:983775
Note
Validerad; 2001; 20090925 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Manouchehri, Hamid-RezaRao, K. HanumanthaForssberg, Eric

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