it can be seen
that there are two diffraction peaks about 458 and 758
diffraction angles corresponding to (0 0 2)/(2 0 0) and (1 0 3)/
(3 0 1) crystal faces for V-doped BTO ceramics, respectively. It
indicates that the pure and V-doped BTO ceramics belong to the
tetragonal system based on the X-ray diffraction pattern of
barium titanate (JCPDS file no.05-0626)