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Surface analysis of float glass using surface ablation cell (SAC).: Part 2. Determination of the diffusion characteristics of K+-Na+ ion exchange
RISE., SP – Sveriges Tekniska Forskningsinstitut, Glafo Glasforskningsinstitutet.ORCID-id: 0000-0003-2160-6979
RISE., SP – Sveriges Tekniska Forskningsinstitut, Glafo Glasforskningsinstitutet.
RISE., SP – Sveriges Tekniska Forskningsinstitut, Glafo Glasforskningsinstitutet.ORCID-id: 0000-0002-9173-0847
2010 (engelsk)Inngår i: Glass Technology: European Journal of Glass Science and Technology Part A, ISSN 1753-3554, Vol. 51, nr 2, s. 55-62Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The surface ablation cell (SAC), a laboratory equipment for determining surface concentration profiles, has been utilised to characterise surface ion exchange processes in float glass. In this paper, single-side ion exchange is reported. Data on the ion concentration profiles were used to calculate diffusion coefficients as well as the activation energy for K +-Na+ ion exchange. The air-sides of float glass samples were treated with two different salt mixtures, (I) 2:1 KNO3:KCI, and (II) 1:2 KNO3:KCl, (both by weight), and heated to different temperatures below Tg, 460-520°C. The diffusion coefficients calculated using a Green's function approach were in the ranges (I) 1.4×10-11 to 6.8×10-11 and (II) 1.8×10-11 to 6.0×10-11 cm2/s while those calculated using Boltzmann-Matano were in the ranges (I) 5.7×10 -11 to 14×10-12 and (II) 3.4×10-12 to 6.0×10-12 cm2/s. Average values of the activation energies obtained through the Green's function were (I) 111.0 kJ/mol and (II) 99.8 kJ/mol for the different salt mixtures.

sted, utgiver, år, opplag, sider
2010. Vol. 51, nr 2, s. 55-62
Emneord [en]
Chemical engineering
Emneord [sv]
Kemiteknik
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URN: urn:nbn:se:ri:diva-908Scopus ID: 2-s2.0-77952754366OAI: oai:DiVA.org:ri-908DiVA, id: diva2:958449
Tilgjengelig fra: 2016-09-07 Laget: 2016-09-07 Sist oppdatert: 2018-08-14bibliografisk kontrollert

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