Abstract
The main aim of this work was to synthesize the magnesium orthostannate doped by terbium cations and tested whether these materials can be used for colouring of the different materials, e.g. organic binder and ceramic glazes. Initial composition of pigments was counted according the general formula 2MgO(1 − x)SnO2–xTbO2, where values of x varied from 0.1 to 0.5 in 0.1 steps. The simultaneous TG/DTA measurements of mixture containing tin oxide, magnesium carbonate hydroxide and terbium oxide showed that the formation of a new compound started at temperature 1,029 °C, but single-phase system was not prepared. Granulometric compositions of samples that were prepared by calcining at temperatures 1,300–1,400 °C are characterized by values of median (d 50) in range 4–8 μm. The calcining temperature 1,500 °C caused the increase of the particle sizes at around 12 μm. The composition of sample 2MgO–1.5SnO2–0.5TbO2 and heating temperature 1,500 °C are the most suitable conditions for preparation of colourfully interesting pigment that can be recommended also for colouring of ceramic glazes. Especially, for colouring of decorative lead containing glaze G 07091 containing 5 wt% of PbO and 8 wt% of Al2O3.
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Acknowledgements
This work has been supported by Research plan of MSM Czech Republic No. 0021627501 and by Grant Agency of Czech Republic, project No. 104/08/0289.
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Dohnalová, Ž., Šulcová, P. & Trojan, M. Synthesis and colour properties of pigments based on terbium-dopped Mg2SnO4 . J Therm Anal Calorim 101, 973–978 (2010). https://doi.org/10.1007/s10973-010-0701-4
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DOI: https://doi.org/10.1007/s10973-010-0701-4