Skip to main content
SpringerLink
Log in

Optimization of the Fe/Sr ratio in processing of ultrafine strontium hexaferrite powders by a sol-gel autocombustion method

  • Magnetic Particles and Nanocrystalline Materials
  • Published:
The Physics of Metals and Metallography Aims and scope Submit manuscript

Abstract

A novel sol-gel autocombustion method has been used to synthesize ultrafine particles of strontium hexaferrite. The nitrate citrate gels were prepared from metal nitrates and citric acid with various molar ratios of Fe/Sr. The results showed that the nitrate citrate gel exhibits a self-propagating behavior after ignition in air. The resultant powders with different molar ratios of Fe/Sr were investigated by the differential thermal analysis, thermal gravimetry, and X-ray diffraction techniques. The investigations showed that there was an optimum molar ratio for Fe/Sr in which the calcination temperature for obtaining single-phase strontium hexaferrite is minimum. Scanning electron microscopy was also used to characterize the microstructure of the products. The crystallite size of the resultant powder was about 40 to 50 nm.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. J. Huang, H. Zhuang, and W. L. Li, Mater. Res. Bull. 38, 149 (2003).

    Article  CAS  Google Scholar 

  2. J. Huang, H. Zhuang, and W. Li, J. Magn. Magn. Mater. 256, 390 (2003).

    Article  CAS  Google Scholar 

  3. M. Sivakumar, A. Gedanken, W. Zhong, et al., J. Magn. Magn. Mater. 268, 95 (2004).

    Article  CAS  Google Scholar 

  4. X. Liu, J. Wang, L. M. Gan, and S. C. Ng, J. Magn. Magn. Mater. 195, 452 (1999).

    Article  CAS  Google Scholar 

  5. Z. B. Guo, W. P. Ding, W. Zhong, et al., J. Magn. Magn. Mater. 175, 333 (1997).

    Article  CAS  Google Scholar 

  6. A. Ataie and S. Heshmati-Manesh, J. Eur. Ceram. Soc. 21, 1951 (2001).

    Article  CAS  Google Scholar 

  7. R. M. Garcia, E. R. Ruiz, and E. E. Rams, Mater. Lett. 50, 183 (2001).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Center of Excellence in Magnetic Materials, Department of Metallurgy and Materials, University of Tehran, Tehran, Iran

    S. Alamolhoda & S. A. Seyyed Ebrahimi

  2. Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran

    A. Badiei

Authors
  1. S. Alamolhoda
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. A. Seyyed Ebrahimi
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. A. Badiei
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

The text was submitted by the authors in English.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Alamolhoda, S., Seyyed Ebrahimi, S.A. & Badiei, A. Optimization of the Fe/Sr ratio in processing of ultrafine strontium hexaferrite powders by a sol-gel autocombustion method. Phys. Metals Metallogr. 102 (Suppl 1), S71–S73 (2006). https://doi.org/10.1134/S0031918X06140183

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1134/S0031918X06140183

PACS numbers

Search

Navigation