Archives of Metallurgy and Materials

Abstract

Bismuth niobate (BiNbO 4 ) ceramics were fabricated by mixed oxide method and sintered by presureless sintering method. BiNbO 4 ceramics doped with V 2 O 5 additive in amount 0.125 wt%, 0.250 wt% and 1 wt% of was sintered at T = 910°C whereas BiNbO 4 ceramics doped with 2 wt% of CuO additive was sintered at T = 890°C and T = 910°C. It was found that V 2 O 5 additive improved morphology of the ceramic samples. However, the chemical composition of BiNbO 4 ceramics in relation to bismuth oxide and niobium oxide manifested a tendency of lack of Bi 2 O 3 component. Absorption bands for the BiNbO 4 compound were identified. FTIR band positions associated with NbO 6 octahedra suggested that the crystal structure changes after V 2 O 5 incorporation.