Sammanfattning
Chemical durability of glazes is previously mostly studied as corrosion of the glassy phase. In this work the focus is on corrosion tendency of the typical crystalline phases in raw glazes. Fifteen experimental glazes were ball-milled of commercial raw materials. After fast-firing in industrial kiln and traditional firing in laboratory furnace the glazes were immersed in aqueous solutions of different pH. Changes in the phase composition of the surfaces were analysed with visual examination, XRD and SEM/EDX applying a procedure allowing to study the same crystal both before and after immersion. The results indicate that wollastonite type crystals were attacked in all but the most alkaline solutions. Diopside, quartz and corundum crystals did not show any marked attack. The interfacial layer around feldspar crystals as well as the glassy phase in the glazes corroded in the most acidic and alkaline environments.
| Originalspråk | Engelska |
|---|---|
| Sidor (från-till) | 1811-1816 |
| Antal sidor | 6 |
| Tidskrift | Journal of the European Ceramic Society |
| Volym | 27 |
| Nummer | 2-3 |
| DOI | |
| Status | Publicerad - 2007 |
| MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Finansiering
This work is part of the Activities of the Åbo Akademi Process Chemistry Centre funded by the Academy of Finland in their Centres of Excellence Programme. Financial support from the Clean Surfaces 2002–2006 Technology Programme by the Finnish National Technology Agency (Tekes), Graduate School of Materials Research, Ido Bathroom Ltd, Pukkila Oy Ab and Farmos is acknowledged. Ms Susanne Ena, Ms Jaana Paananen and Mr Clifford Ekholm are thanked for their help with the analysis of the samples.