Shifting of X-Ray Diffraction Pattern Peak on BaFe₁₂O₁₉ Nanocrystalline Produced by Sol Gel Auto Combustion Method

Abstract:

Barium hexaferrite BaFe12O19 (BHF) is one of the great importance as permanent magnets, particularly for recording magnetic in microwave devices. Nanocrystalline BHF powders were prepared by sol gel auto combustion method in citric acid – metal nitrates system. Hence the mole ratios of Ba2+/Fe3+ were varied at 1:12; 1:11.5 and 1:11 and with pH of 7 in all cases using amonia solution. For final formation of nanocrystalline BHF, heating process was done at 850oC for 10 hours in all mol ratios of Ba2+/Fe3+. The nanocrystallite size was calculated from broadening X Ray Diffraction (XRD) peaks using Scherrer formula. XRD data shows that BHF of ratio 1:12 has the same diffraction pattern with the ratio of 1:11 especially at higher value of 2 θ. Diffraction pattern of BHF with the ratio of 1:11.5 was fitting in exactly to the standard searching match and the highest value of best Figure of Merit (FoM) is 90% with the crystallite size of 22 nm. The best FoM and crystallite size for ratio of 1:12 and 1: 11 are 88% and 56 nm respectively. The diffraction peaks of BHF with the ratio of 1:12 and 1:11 are in the right side from of 1:11.5 since the amount of impurity of both is higher (12%) than of BHF with the ratio of 1:11.5 (10%).

• Periodical: Advanced Materials Research (Volume 576)
• Pages: 240-243
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.576.240
• Online since: October 2012
• Authors: Dwita Suastiyanti, Bambang Soegijono
• Keywords: Diffraction Pattern, Nanocrystalline, Sol-Gel (SG)

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