Comparative Study of Phases Forming in Niobium-Antimony Oxides System upon High Temperature Treatment and High-Energy Ball Milling

Abstract

The compound SbNbO4 that is formed in a ternary system of NbSbO has been obtained for the rst time by high-energy ball milling of the equimolar mixture of oxides Sb2O3/Nb2O5in argon atmosphere. This compound was characterised by X-ray diraction, dierential thermal analysis-thermal gravimetry, infrared, and scanning electron microscopy methods and its properties were compared with those of SbNbO4 also obtained as a result of high-temperature reaction between the same oxides and also in argon atmosphere. As shown by dierential thermal analysis results, irrespective of the method of synthesis, SbNbO4 is stable in argon atmosphere up to ≈ 1125• C and in air up to ≈ 800• C. The compound can be applied as a photocatalyst in the reaction of producing hydrogen from water.

NbSbO4 Kristalinin Yapısal, Elastik ve Piezoelektrik Özelliklerinin İncelenmesi

“…SbNbO 4 compound, formed in the ternary system of Nb-Sb-O, was obtained for the first time by high-energy ball milling of an equimolar oxide Sb 2 O 3 /Nb 2 O 5 mixture in an argon atmosphere. This compound is X-ray diffraction, differential thermal analysisthermal gravimetry, characterized by infrared and scanning electron microscopy methods (Dulian et al, 2014). Experimental vibrational spectroscopic study of solid solutions for ferroelectric SbNbO 4 and antiferroelectric BiNbO 4 crystals was performed (Ayyub et al, 1986).…”