Stability of zircon pigments in water and diethylene glycol media: The case of turquoise V-ZrSiO4
CERAMICS INTERNATIONAL, cilt.39, sa.2, ss.1909-1915, 2013 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 39 Sayı: 2
- Basım Tarihi: 2013
- Doi Numarası: 10.1016/j.ceramint.2012.08.040
- Dergi Adı: CERAMICS INTERNATIONAL
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1909-1915
- Anahtar Kelimeler: Suspension, Colour, Silicates, Pigments, SOLUBILITY, ADSORPTION, CHARGE, OXIDE, PH
- Anadolu Üniversitesi Adresli: Evet
Özet
The stability of pigment particles can be affected by physico-chemical interactions between the pigment particles and a solvent. In this study, the surface charges and stabilities of blue V-ZrSiO4 pigments in aqueous (water) and non-aqueous (diethylene glycol) suspensions were investigated. As a function of pH, the isoelectric points (IEP) for the commercial and synthesised pigments were determined to be 2.2 and 1.7, respectively. ICP-OES results show that the cations of V-ZrSiO4 pigments dissolve in both aqueous and non-aqueous systems. The dissolution of the pigment particles was more significant in DEG because the total ion concentration (> 2000 ppm) was higher than that of the aqueous medium (> 200 ppm). The colour stability of the V-ZrSiO4 powder deteriorates as a consequence of an insufficient chemical stability both in the water and DEG media. Additionally, the V-ZrSiO4 particles dissolve with proton-promoted and hydroxyl-promoted dissolution mechanisms in the aqueous medium, whereas these particles dissolve with a ligand-promoted dissolution mechanism in the non-aqueous medium. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.