ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

A comparative study of the influence of the method of synthesis of intermediate products in the preparation of CoNd₂W₂O₁₀ and MnNd₂W₂O₁₀ and their color properties in ceramic glazes

Petr Bělina, Veronika Machalíková, Nataliia Gorodylova, and Petra Šulcová

Department of Inorganic Technology, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic

E-mail: petr.belina@upce.cz

Abstract: The compounds CoNd₂W₂O₁₀ and MnNd₂W₂O₁₀ were prepared by solid state reaction between CoWO₄, resp. MnWO₄ and Nd₂WO₆. Intermediates were prepared in laboratory by a solid state reaction and by a co-precipitation reaction. The new single-phase compounds CoNd₂W₂O₁₀ and MnNd₂W₂O₁₀ were prepared only from intermediates prepared by solid state reaction, as in second case the morphology of particles is inappropriate and during the reaction an unknown phase (Nd–W–O) is formed. To describe the processes during thermal reactions, the DTA/TG were used. CoNd₂W₂O₁₀ and MnNd₂W₂O₁₀ belong to the orthorhombic crystallographic system, their diffraction pattern were indexed. The new compounds were tested as inorganic pigments. Application of the prepared compounds in ceramic glazes did not provide technological interesting results. The reason is probably the low thermal stability of the prepared compounds CoNd₂W₂O₁₀ and MnNd₂W₂O₁₀. In particle form CoNd₂W₂O₁₀ has blue color and MnNd₂W₂O₁₀ has brown color.

Keywords: Rare earth metal tungstate; Cobalt tungstate; Manganese tungstate; Color properties

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-017-0150-7

Chemical Papers 71 (9) 1597–1603 (2017)