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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. 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 |
|---|---|
| Subjects: | T Technology > TP Chemical technology T Technology > TA Engineering (General). Civil engineering (General) |
| Journal or Publication Title: | JOURNAL OF NON-CRYSTALLINE SOLIDS |
| Publisher: | ELSEVIER SCIENCE BV |
| ISSN: | 0022-3093 |
| Date: | 1 September 2005 |
| Volume: | 351 |
| Number: | 30-32 |
| Number of Pages: | 13 |
| Page Range: | pp. 2524-2536 |
| Identification Number: | 10.1016/j.jnoncrysol.2005.06.040 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/6589 |
Data sourced from Thomson Reuters' Web of Knowledge
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