Sintesis dan karakterisasi Aurivillius Lapis Dua CaBi2Ta2O9 dan Aurivillius Lapis Dua BaBi2NbTaO9 dengan Metode Solid State

Abstract

Aurivillius lapis dua CaBi₂Ta₂O₉ telah berhasil disintesis dengan menggunakan metode kimia padat sedangkan Aurivillius lapis dua BaBi₂NbTaO₉ belum terbentuk sempurna. Pembakaran dilakukan bertahap pada Suhu 400 °C selama 8 jam, 900 °C selama 2 jam, dan 1100 °C selama 12 jam. Fasa BaBi₂NbTaO₉ yang terbentuk berupa BaNbTaO_9. Senyawa CaBi₂Ta₂O₉ memiliki struktur kristal ortorombik dengan grup ruang Fm2m sedangkan BaNbTaO₆ berstruktur monoklinik dengan grup ruang P2₁/c. Perubahan subtituen pada kation A (Ca, Ba) memberikan pengaruh berarti dalam pembentukan struktur Aurivillius sedangkan pada kation B (Ta₂, NbTa) mempengaruhi intensitas dan suhu sintesis. Intensitas puncak yang dihasilkan menunjukkan kristalinitas Aurivillius CaBi₂Ta₂O₉lebih tinggi daripada  BaNbTaO₆

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