Strengthening of container glasses by ion-exchange dip coating
UNSPECIFIED. (2005) Strengthening of container glasses by ion-exchange dip coating. JOURNAL OF NON-CRYSTALLINE SOLIDS, 351 (30-32). pp. 2524-2536. ISSN 0022-3093Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2005.06.040
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|
|Official Date:||1 September 2005|
|Number of Pages:||13|
|Page Range:||pp. 2524-2536|
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