A New Low-Temperature Sintering Method for NiCuZn Ferrite

Abstract:

Low temperature sintering NiCuZn ferrite was employed at most cases due to its co-firability with Ag (below 960°C). The purpose of this study is to fabricate NiCuZn ferrite sintered body with high-strength and high-frequency magnetic properties. Following is the procedure: firstly, NiCuZn ferrite powder was synthesized under CO2 atmosphere at 500°C from the mixed doxalate synthesized by liquid phase deposition method; then a small amount of boric acid [H3BO3] was added to the powder, and the NiCuZn ferrite powder compact was prepared with Newton press and CIP methods; finally, NiCuZn ferrite sintered body was fabricated by sintering at 900°C under CO2 atmosphere. By this method, NiCuZn ferrite sintered body with 0.5 mass% boric acid was obtained, which was additive with strength 340 MPa, high frequency applied scope below 20MHz and initial permeability 38.

• Periodical: Key Engineering Materials (Volumes 336-338)
• Pages: 695-698
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.336-338.695
• Online since: April 2007
• Authors: Pei Bian, Dong Ying Ju
• Keywords: Boric Acid, CIP, CO₂, NiCuZn, Sintered Body

References

[1] S. S. Vidyawathi, R. Amaresh and L. N. Satapathy: Bull. Mater. Sci., Vol. 25 (2002), p.569.

[2] I. Nakahata, T. Murase and A. Nakano: J. Japan Soc. Powder and Powder Metall. Vol. 48 (2001), p.126.

[3] A. Oi, A. Nakano and T . Nomura: J. Japan Soc. Powder and Powder Metall. Vol. 47 (2000), p.779.

[4] H. Kobayashi, T. Ikeda, T. Mitamura, K. Kakizaki and N. Hiratsuka: J. Japan Soc. Powder and Powder Metall. Vol. 43 (1996), p.90.

[5] H. Kobayashi, H. Minowa, Y. Yamamoto, K. Kakizaki and N. Hiratsuka: J. Japan Soc. Powder and Powder Metall. Vol. 45 (1998), p.68.

[6] P. Bian, D.Y. Ju and T. Mitamura: J. Japan Soc. Powder and Powder metall. Vol. 50 (2003), p.721.