Two series of glazes have been produced from different combinations of the same raw materials in the range of interest for sanitary-ware applications: they are designed to allow one to get insight into network-forming and network-modifying species. Fusibility tests and hot stage microscope observations show the influence of even low differences in the starting chemical compositions on the transformation temperatures. X-ray powder diffraction, wavelength dispersion spectrometry and scanning electron microscopy prove that: (i) zircon, the most abundant crystalline phase, is homogeneously distributed and decreases by a 3% from its starting value; (ii) the glass-phase of glaze has a quasi-uniform composition. X-ray synchrotron radiation micro-tomography shows that glaze porosity is 15% by volume, and voids are prevalently not interconnected and with size up to 50 μm. The linear thermal expansion of the glass phase of glaze ranges between 6 and 7 × 10 -6 °C -1, without apparent correlation with composition.
Influence of composition on some industrially relevant properties of traditional sanitary-ware glaze / A. Bernasconi, V. Diella, N. Marinoni, A. Pavese, F. Francescon. - In: CERAMICS INTERNATIONAL. - ISSN 0272-8842. - 38:7(2012), pp. 5859-5870.
Titolo: | Influence of composition on some industrially relevant properties of traditional sanitary-ware glaze |
Autori: | PAVESE, ALESSANDRO (Penultimo) |
Parole Chiave: | Thermal expansion; Glass-ceramics; Glaze; Micro-analytical methods; X-ray synchrotron radiation computed micro-tomography; Digital image analysis; Pore microstructure |
Settore Scientifico Disciplinare: | Settore GEO/06 - Mineralogia |
Data di pubblicazione: | 2012 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.ceramint.2012.04.037 |
Appare nelle tipologie: | 01 - Articolo su periodico |
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