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Strengthening of container glasses by ion-exchange dip coating
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UNSPECIFIED (2005) Strengthening of container glasses by ion-exchange dip coating. JOURNAL OF NON-CRYSTALLINE SOLIDS, 351 (30-32). pp. 2524-2536. doi:10.1016/j.jnoncrysol.2005.06.040 ISSN 0022-3093.
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Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2005.06.040
Abstract
The strengthening of industrial grade sodium aluminosilicate glasses was investigated using halide base ion-exchange by dip coating. Li ion-exchange showed a significant flexural strength enhancement of 16-163% up to a maximum value of 506 MPa for container glass composition with progressively increasing network modifier additions of alumina from 3 to 10 wt%. The results showed a linear relationship between square root of exchange duration, t(1/2), and the layer thickness. An optimum layer thickness of 20-70 mu m was found to be adequate to counteract the surface flaws responsible for container glass fracture. Differential thermogravimetry experiments showed a shift in both the transformation (T-g) and melting temperatures (T-m) with concomitant change in viscosity with alumina additions. The surface crystallization phase responsible for strength increase was identified by X-ray diffraction as a low thermal expansion co-efficient (TCE) phase of beta-spodumene (Li2O - Al2O3 - 4SiO(2))/beta-eucryptite (Li2O - Al2O3 - SiO2) with a measured crystallite size of 235-380 angstrom. Some experimental runs of electrostatic spraying were found to have a limited impact in controlling the process parameters in producing a surface crystallized layer thickness of 20 mu m. (c) 2005 Elsevier B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TP Chemical technology T Technology > TA Engineering (General). Civil engineering (General) |
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Journal or Publication Title: | JOURNAL OF NON-CRYSTALLINE SOLIDS | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0022-3093 | ||||
Official Date: | 1 September 2005 | ||||
Dates: |
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Volume: | 351 | ||||
Number: | 30-32 | ||||
Number of Pages: | 13 | ||||
Page Range: | pp. 2524-2536 | ||||
DOI: | 10.1016/j.jnoncrysol.2005.06.040 | ||||
Publication Status: | Published |
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