Исследование фазовых превращений в сегнетоэлектриках на основе титаната кальция.
DOI:
https://doi.org/10.31489/2021-No3/5-10Ключевые слова:
титанат кальция, фазовые превращения, перовскиты, сегнетоэлектрики, степень кристалличностиАннотация
Целью данной работы является исследование кинетики фазовых превращений в сегнетоэлектриках на основе титаната кальция. Актуальность данного исследования заключается в оценке новых методов получения сегнетоэлектриков сложного фазового состава, обладающих потенциалом применения в микроэлектронике, фотокатализе и энергетике. В качестве основных методов анализа были применены методы растровой электронной микроскопии и рентгеновской дифракции. Анализ морфологических особенностей позволил установить кинетику изменения не только размеров зерен, но и их геометрии. В ходе проведенных исследований фазовых превращений в зависимости от температуры отжига была установлена следующая зависимость типа TiO2 – anatase/CaTi2O4 → TiO2– anatase /CaTi2O4/CaTiO3 → CaTiO3/TiO2 – rutile. При этом при температуре 1000°C происходит формирование устойчивой структуры керамики с перовскитоподобной структурой типа CaTiO3 и высокой степенью структурных упорядочений (более 92%).
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