Chapter 5. Synthesis and Characterization of Fine-Grained 3Y-TZP/Hexaferrite in Situ Composites

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Yoshikazu Suzuki,
  2. Masanobu Awano,
  3. Naoki Kondo and
  4. Tatsuki Ohji

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch5

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

How to Cite

Suzuki, Y., Awano, M., Kondo, N. and Ohji, T. (2008) Synthesis and Characterization of Fine-Grained 3Y-TZP/Hexaferrite in Situ Composites, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch5

Author Information

  1. National Industrial Research Institute of Nagoya 1–1 Hirate-cho, Kita-ku, Nagoya 462–8510, Japan

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375693

Online ISBN: 9780470294635

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Keywords:

  • X-ray;
  • ferromagnetic materials;
  • magnetic properties;
  • scanning electron microscopy (SEM);
  • mixed powder

Summary

High-temperature x-ray diffraction studies revealed the in situ reaction behavior for BaO-Fe2O3, and La2O3-MO-Fe2O3 systems (M= Mg, Zn) within 3Y- TZP (3 mol%-y2O3-doped tetragonal ZrO2 polycrystals) matrix. Although barium hexaferrite was easily formed at ≥ 1000°C, lanthanum hexaferrite was scarcely formed even at 1200°c despite the existence of charge compensating divalent cations. For the La2O3-MO-Fe2O3 system, lanthanum orthoferrite was first formed, and then it reacted with α-Fe2O3 to yield lanthanum hexaferrite at higher temperatures. For the BaO-Fe2O3 system, fine-grained 3Y-TZP/BaFe12O19in situ composites were successfully synthesized. The 3Y-TZP/20 wt% BaFe12O19in situ composite possessed good magnetic properties as well as moderately good mechanical properties.