Nanosize effects on magnetic properties and peak shifting of X-ray diffraction pattern of BaFe12O19 produced by sol gel method

Dwita Suastiyanti, Bambang Soegijono, M. Hikam

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The formation of barium hexaferrite, BaFe12O19 single phase with nanosize crystalline is very important to get the best performance especially magnetic properties. The samples were prepared by sol gel method in citric acid-metal nitrates system. Hence the mole ratios of Ba2+/Fe3+ were varied at 1:12 and 1:11.5 with pH of 7 in all cases using ammonia solution. The solution was then heated at 80-90°C for 3 to 4 hours. Then it was kept on a pre- heated oven at 150oC. The samples were then heat treated at 450oC for 24 hours. Sintering process was done at 850°C and 1000°C for 10 hours. Crystallite size was calculated by X-Ray Diffraction (XRD) peaks using scherrer formula. To confirm the formation of a single phase, XRD analyses were done by comparing the sample patterns with standard pattern. The peak shifting of pattern could be seen from XRD pattern using rocking curves at extreme certain 2θ. It was used MPS Magnet-Physik EP3-Permagraph L to know magnetic characteristics. This method can produce BaFe12O19 nanosize powder, 22-34 nm for crystallite size and 55.59-78.58 nm for particle size. A little diference in nanosize affects the peak shifting of XRD pattern significantly but shows a little difference in magnetic properties especially for samples at 850°C and 1000°C with mole ratio of 1:12 respectively. The well crystalline powder is formed at mole ratio of 1:11.5 at 850°C since it has the finest particle (55.59 nm) and crystalline (21 nm), the highest remanent magnetization (0.161 T) and the lowest intrinsic coersive (275.8 kA/m). It is also fitting exactly to the standard diffraction pattern with the highest value of best Figure of Merit (FoM), 90%. XRD peak position of this sample is almost same with XRD peak position of another sample with sinter temperature 1000°C at same mole ratio.

Original languageEnglish
Title of host publicationAdvances in Materials, Processing and Manufacturing
Pages87-92
Number of pages6
DOIs
Publication statusPublished - 29 Oct 2013
Event13th International Conference on Quality in Research, QiR 2013 - Yogyakarta, Indonesia
Duration: 25 Jun 201328 Jun 2013

Publication series

NameAdvanced Materials Research
Volume789
ISSN (Print)1022-6680

Conference

Conference13th International Conference on Quality in Research, QiR 2013
Country/TerritoryIndonesia
CityYogyakarta
Period25/06/1328/06/13

Keywords

  • Crystallite size
  • Particle size
  • Single phase
  • Sol gel
  • XRD pattern peak

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