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Journal of Materials Science

, Volume 29, Issue 5, pp 1348–1351 | Cite as

Glass formation and crystallization of barium ferrite in the Na2O-BaO-Fe2O3-SiO2 system

  • C. -K. Lee
  • R. F. Speyer
Papers

Abstract

Amorphous ribbons of approximate composition 0.13Na2O-0.30BaO-0.30Fe2O3-0.27SiO2 were successfully fabricated using roller-quenching, after melting at 1400‡C. Devitrification of the amorphous phase by annealing at 710‡C for 2 h formed a uniform distribution of barium ferrite (BaFe12O19) particles with a mean diameter of 55.88 nm. Other crystalline phases formed on heat treatment were BaFe2O4 and Na2Ba2Si2O7. Devitrified ribbons showed a saturation magnetization (MS) of 24.41 emu g−1 and a coercivity (HC) of 3.06 kOe.

Keywords

Polymer Crystallization SiO2 Heat Treatment Ferrite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • C. -K. Lee
    • 1
  • R. F. Speyer
    • 1
  1. 1.School of Materials Science and EngineeringGeorgia Institute of TechnologyAtlantaUSA

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