학술논문
Ceramic pigments with sphene structure obtained by both spray- and freeze-drying techniques
Document Type
Report
Source
Powder Technology. July 10, 2009, Vol. 193 Issue 1, p1, 5 p.
Subject
Language
English
ISSN
0032-5910
Abstract
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.powtec.2009.01.020 Byline: T. Stoyanova Lyubenova (a), F. Matteucci (b), A. Costa (b), M. Dondi (b), J. Carda (a) Keywords: Sphene; Ceramic pigments; Spray and freeze drying; Colour Abstract: The present study is focused on the procedure of spray- and freeze-drying techniques for the preparation of Cr-doped sphene pigments (CaSn.sub.0.98Cr.sub.0.02SiO.sub.5, CaTi.sub.0.98Cr.sub.0.02SiO.sub.5) from an aqueous solution of precursor salts, followed by calcinations of the resulting powders in absence of additives. The evolution of the present crystalline phases with applied thermal treatments was studied by X-ray powder diffraction and thermal analysis. The powder morphology was analysed by scanning electronic microscopy. The behaviour of the chromium ion was clarified by ultraviolet and visible spectroscopy. The colour efficiency of pigments was evaluated by colourimetric analysis (CIE L[cor]a[cor]b[cor] system). Author Affiliation: (a) University Jaume I, Castellon de la Plana, Spain (b) ISTEC-CNR, Institute of Science and Technology for Ceramics, Faenza, Italy Article History: Received 9 July 2007; Revised 2 December 2008; Accepted 27 January 2009