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Sökning: L773:0017 1050 > (2010)

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1.
  • Karlsson, Stefan, 1984-, et al. (författare)
  • Surface Analysis of float glass using Surface Ablation Cell (SAC) Part 2: Determination of the diffusion characteristics of K+-Na+ ion exchange
  • 2010
  • Ingår i: Glass Technology. - 0017-1050. ; 51:2, s. 55-62
  • Tidskriftsartikel (refereegranskat)abstract
    • The Surface Ablation Cell (SAC), a laboratory equipment for determining surface concentration profiles, has been utilised to characterise float glass surface ion exchange processes. 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) KNO3:KCl, 2:1 and II) KNO3:KCl, 1:2, and heated to different temperatures under Tg, 460-520 °C. The diffusion coefficients calculated with Green’s function were in the range I) 1.4x10-11 to 6.8x10-11 and II) 1.8x10-11 to 6.0x10-11 cm2/s while calculated according to Boltzmann-Matano I) 5.7x10-12 to 1.4x10-11 and II) 3.4x10-12 to 6.0x10-12 cm2/s. Average values of the activation energies obtained through Green’s function were I) 111.0 kJ/mol and II) 99.8 kJ/mol for the different salt mixtures.
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2.
  • Karlsson, Stefan, 1984-, et al. (författare)
  • The technology of chemical glass strengthening - a review.
  • 2010
  • Ingår i: Glass Technology. - 0017-1050. ; 51:2, s. 41-54
  • Forskningsöversikt (refereegranskat)abstract
    • The methods of chemical strengthening for improving the mechanical properties of oxide glasses are reviewed. Chemical strengthening in compared with thermal strengthening and different methods of measuring strength are discussed. Different ions, salts and other related methods for improving the ion exchange process and mechanical properties are described as well as applications of strengthening.
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  • Resultat 1-3 av 3

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