Effect of heat treatment on microstructure of BaTiO3 solidified by aerodynamic levitator
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BaTiO3 was solidified using an aerodynamic levitator. The effect of heat treatment on microstructure of BaTiO3 wasinvestigated. Domain walls with a width of ~ 400 nm were observed in the BaTiO3 grains. The composition shift fromstoichiometric BaTiO3 to a Ti- or TiO2-rich composition was attributed to the evaporation of BaO. Ti-rich Ba6Ti17O40 wasformed by a reaction with excess TiO2 and BaTiO3 during heat treatment at 1000 oC. A diffuse-interface was observed,indicating that Ba6Ti17O40 had formed by atomic diffusion.
Abstract
BaTiO3 was solidified using an aerodynamic levitator. The effect of heat treatment on microstructure of BaTiO3 wasinvestigated. Domain walls with a width of ~ 400 nm were observed in the BaTiO3 grains. The composition shift fromstoichiometric BaTiO3 to a Ti- or TiO2-rich composition was attributed to the evaporation of BaO. Ti-rich Ba6Ti17O40 wasformed by a reaction with excess TiO2 and BaTiO3 during heat treatment at 1000 oC. A diffuse-interface was observed,indicating that Ba6Ti17O40 had formed by atomic diffusion.
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