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Simultaneous chemical vapor deposition and thermal strengthening of glass
RISE - Research Institutes of Sweden, Built Environment, Building Technology. (Glass)
RISE - Research Institutes of Sweden, Built Environment, Building Technology. (Glass)ORCID iD: 0000-0001-7925-6137
Johnson Matthey Technology Centre, UK.
Johnson Matthey Technology Centre, UK.
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2018 (English)In: 12th International Conference on Coatings on Glass and Plastics (ICCG 12), 2018Conference paper, Published paper (Other academic)
Abstract [en]

The LIMES project (Light Innovative Materials for Enhanced Solar Efficiency), a Solar-ERA.NET project, was a fruitful collaboration to optimize many different properties in state-of-the-art solar glasses for photovoltaic (PV) modules. Here, we present results related to the effectiveness of combining chemical vapor deposition and thermal strengthening of glass in a simultaneous process. The treated glass surfaces gets a markedly increase of Al2O3, which in previous studies has been shown to have a beneficial effect on the mechanical properties. Successful thermal strengthening and in-situ Chemical Vapor Deposition (CVD) have repeatedly been performed on 4 and 2 mm flat glasses. The strengthening level has been quantified using SCALP (Scattered Light Polariscope). The samples were found to have a surface compressive stress in the range of 85-110 MPa which is comparable to the level of conventional thermally strengthened safety glass. The surface mechanical properties of the samples have been investigated by means of nano/microindentation and the strength of glasses has been quantified by ring-on-ring method. The transparency of the samples after washing was characterized by UV-Vis spectroscopy.

The in-situ CVD thermally strengthened glasses gets an Al2O3 coated surface which exhibits increased crack resistance and increased scratch resistance as compared to traditionally thermally strengthened glass. The nanohardness for low loads, ≤ 1 mN, follow the order thermo-chemically strengthened glass > thermally strengthened glass > annealed float glass. The results of the strength tests show that the 2 mm thin glass were positively affected by the Al2O3 coating while the 4 mm did not show any significant change. The light transmittance of the treated glasses was not markedly reduced. In summary, this novel process show possibilities to increase specific properties, in this case surface mechanical properties, by simultaneous CVD and thermal strengthening.

Place, publisher, year, edition, pages
2018.
Keywords [en]
Chemical vapour deposition, Thermal strengthening, crack resistance, contact angle, hardness
National Category
Materials Engineering Nano Technology
Identifiers
URN: urn:nbn:se:ri:diva-33943OAI: oai:DiVA.org:ri-33943DiVA, id: diva2:1219942
Conference
ICCG 12 – Conference on Coatings on Glass and Plastics, Würzburg, Germany
Projects
LIMES
Funder
Swedish Energy Agency, 38349-1Available from: 2018-06-18 Created: 2018-06-18 Last updated: 2018-06-21Bibliographically approved

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Grund Bäck, LinaKarlsson, Stefan

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