Formation and Thermal Behavior of Nanocrystalline Bi2Ti2O7

Resumo

Formation of nanocrystalline bismuth titanate Bi₂Ti₂O₇ with pyrochlore structure obtained via thermal decomposition of a co-precipitated product has been studied. The onset of vigorous formation of Bi₂Ti₂O₇ has been shown to correlate with the melting point of the surface phase based on bismuth oxide. The upper temperature limit of the region of nanocrystalline Bi₂Ti₂O₇ stability has been found. Technological parameters of synthesis of Bi₂Ti₂O₇ with average crystallite size of 75–130 nm have been determined.