Phase study of Mg1-xZnxTiO3 powders prepared by dissolved metals mixing method

Abstract

The effects of calcination temperature and Zn dopant composition on phase composition of Mg1-xZnxTiO3 powders were studied. A simple method of dissolved metals mixing has been accomplished. The metal powders were prepared with a stoichiometric Mg/Zn/Ti in mol% of (1 - x): x:1 for x=0; 0.25; 0.5. The independently dissolved Mg, Zn, and Ti powders in hydrochloric acid solution were mixed and dried then followed by a varied calcination temperature (600, 700, and 800 °C) for 4 h. A qualitative analysis of X-ray diffraction (XRD) data showed that the calcined powders contained a combination among geikielite, rutile, and periclase. The structural study was revealed by Rietveld analysis of XRD data using Rietica and MAUD software. Geikielite content increased as calcination temperature reaching 94.3 %wt for 0 and 0.25 Zn doped samples, otherwise for x=0.5. The roles of calcination temperature and zinc as dopant on geikielite characteristics were also discussed. The increasing calcination temperature and Zn substitution promote the broadening and the shifting position of geikielite peak which indicates a change in the crystallite size and lattice parameters, respectively.