High temperature X-ray diffraction: a in situ technique for phase transformation and formation analysis

High temperature X-ray diffraction technique was used in phases change analysis at zirconia doped with transition metals. The (HTXDR) patterns obtained show gradual transformation of monoclinic phase to tetragonal phase, at 900 to 1250 deg C. The technique was used in phases formation study of typical varistor composition with relation sb/Bi = 2. The patterns analysis of the composition Zn O Bi2 O3 Sb2 O3, show Bi3 Zn2 Sb3 O14 (formation. These reactions occurs at two different temperature regions. The high temperature X-ray diffraction was effective in the phases formation and phases transformation study, specially in relation to the sensitivity to phases detection. (author)