Abstract
Dysprosium titanate with an equimolar ratio of the oxides included in it was obtained by the plasma-chemical method from previously prepared mixed solutions of salt nitrates. The separation of the solid phase from the gas-vapor stream leaving the plasma-chemical reactor was carried out in vortex dust collectors. In all batches of the product, particles of the same morphological set were obtained, with a predominance of hollow spheres with an average size of 200 nm with crystallites of 10-60 nm in size included in them. Uniaxial pressing and subsequent grinding in a planetary mill, as well as electro-pulse dispersion, do not allow obtaining powders of the required dispersion and purity. To ensure close packing during pressing and sintering of powders, the destruction of gas-filled hollow spherical particles is required. For the destruction of spheres, methods have been developed for obtaining particles of the desired morphology directly in a plasma-chemical reactor, for example, a method for “explosive” dispersion of a powder in the process of plasma-chemical synthesis with the introduction of ammonium nitrate into the initial solution. The results of studies of the morphology, granulometric and phase composition of the obtained dysprosium titanate are presented.
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