ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 60, (3) 234 - 242 (2016)


SYNTHESIS OF SnO₂/Cr PIGMENTS DOPED BY PRASEODYMIUM PREPARED BY DIFFERENT METHODS AND THEIR PIGMENTARY PROPERTIES
 
Trojan Jakub, Karolová Lucie, Luxová Jana,Trojan Miroslav
 
Department of Inorganic Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic

Keywords: Cassiterite, Violet ceramic pigments, Chromium, Praseodymium, Solid state reaction, Colour
 

The violet SnO₂/Cr pigments in which a part of tin ions was substituted by praseodymium ions were examined. The compounds Sn0.99Cr0.005Pr0.005O₂ may represent a potential extension of the range of violet shades, especially in their use in ceramics. Pigments have been prepared by classical ceramic route i.e. solid state reaction method, also by the method of mechanoactivation and finally by a two-step process based on the suspension mixing of the initial reagents. The temperature range for the reaction was from 1350 to 1500 °C. Pigments were characterised in terms of colour, they were also studied with respect to their phase composition as well as the particles size distribution. X-ray analysis confirmed that the synthesis temperature 1350 °C is sufficient to get mono-phase compounds in case of all ways of preparation. Mechanoactivation and two-step process can be suggested as the preferable method for acquirement of pigments with the most interesting colour.


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doi: 10.13168/cs.2016.0035
 
 
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