Lancashire, United Kingdom
Lancashire, United Kingdom

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De Carvalho J.N.,University of Surrey | Kirkby N.F.,University of Surrey | Cleaver J.A.S.,University of Surrey | Holmes P.A.,Pilkington European Technical Center
Glass Technology: European Journal of Glass Science and Technology Part A | Year: 2011

A cellular automaton numerical simulation technique has been used to model float glass corrosion caused by the exposure of glass to humid conditions. Four processes were assumed to take place: mass transfer of water vapour from bulk gas to the glass surface, adsorption of water at the glass surface, diffusion of water from the glass surface to the glass bulk and reaction of water within the bulk glass. These processes constitute the foundations of the model presented here. The objective is to compare the amount of water uptake in the simulation results in the early stages with the experimental results from gravimetric analysis. The cellular automaton solution technique was found to be robust, versatile and computationally efficient. The model results compared favourably to experimental data for mass uptake of water. This solution technique can readily be adapted to include other mass transfer mechanisms and glass chemistry and therefore it is recommended for further use in the field of glass corrosion.

De Carvalho J.N.,University of Surrey | Cleaver J.A.S.,University of Surrey | Kirkby N.F.,University of Surrey | Holmes P.A.,Pilkington European Technical Center
Glass Technology: European Journal of Glass Science and Technology Part A | Year: 2014

Float glass is susceptible to corrosion and staining by water and it has been known for over 60 years that treating the glass with zinc can inhibit this process. The effect of zinc treatment on the corrosion flux of water into float glass was measured by a gravimetric technique and was compared with untreated samples. The corrosion flux after 300 mins for an untreated sample was 11-8 times higher than that of a zinc-treated sample exposed at 15°C, 9-25 times higher at 20°C and 2•85 times higher at 30°C. Preliminary results on the ageing effect of the zinc treatment on float glass are also reported. Surface analysis techniques were used to identify the presence of zinc on treated samples.

De Castro V.,Charles III University of Madrid | Benito G.,CSIC - Institute of Materials Science | Hurst S.,Pilkington European Technical Center | Serna C.J.,CSIC - Institute of Materials Science | And 2 more authors.
Thin Solid Films | Year: 2011

Deposition of nanoparticulated films onto glass has been achieved by using an unprecedented combination of laser pyrolysis and chemical vapour deposition (CVD) on a single step process. Characterisation of the films reveals that the coated glasses obtained by this technique have similar characteristics to the ones previously fabricated using a two step pyrolysis plus CVD process. Under the laser action, maghemite or hematite nanoparticulated coatings are obtained by varying the processing conditions. We envisage the incorporation of this one step process for industrial production, where the nanoparticulated film would be deposited as the glass moves along the production line. © 2011 Elsevier B.V. All rights reseved.

Dembele S.,Kingston University | Rosario R.A.F.,Kingston University | Wang Q.S.,Kingston University | Warren P.D.,Pilkington European Technical Center | Wen J.X.,Kingston University
Numerical Heat Transfer, Part B: Fundamentals | Year: 2010

The aim of the study is to predict the thermal and stress behavior of a framed glass subjected to typical fire conditions, and the initial glass fracture time and locations using a probabilistic approach as an alternative to Pagni's deterministic criterion. Thermal stresses in glass have been little researched. The probabilistic approach has the advantage of taking into account some uncertainties such as the edge conditions. The model employed is based on stress and conduction heat transfer models, a spectral discrete ordinates radiation model, and a failure probability model. Some results of its verification and applications are reported here. Copyright © Taylor & Francis Group, LLC.

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