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

Muhammad Farid Teguh Arifianto, Afifah Rosyidah
Submission Date: 2012-08-03 10:32:54
Accepted Date: 2013-01-17 08:33:41

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 BaNbTaO9. 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


Keywords


Aurivillius; subtituen; struktur; kristalinitas.

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