Studies on the Oxide Magnets. I : Effects of Bi_2O_3 on Barium Ferrites

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概要

• 論文の詳細を見る

• Magnetic properties of Ba-ferrites with and without Bi_2O_3 Were compared. Cylindrical specimens were prepared from BaCO_3 and Bi_2O_3, and Fe_2O_3 from Fe(CO)_5. The first reaction was performed at 900℃ for 2 hours, and then sintered at 1100°〜1200℃ for 15 minutes. The magnetic and mechanical properties of Ba-ferrite, were improved by the addition of Bi_2O_3 under the condition in which sintering was performed, especially at the composition Fe_2O_3/BaO<6. And it was considered that the effects might be due to the densification of specimens, and not to the ferromagnetic new phase of BaO-Bi_2O_3-Fe_2O_3 system.

• 東北大学の論文

著者

• OKAMURA Tosihiko

  Research Institute for Scientific Measurements, Tohoku University

• KOJIMA Hiroshi

  Research Institute for Scientific Measurements, Tohoku University

• Watanabe Seiichiro

  Japan Special Steel Co.

• Kojima Hiroshi

  Research Institute For Scientific Measurements

• Okamura Tosihiko

  Research Institute For Scientific Measurements

• Okamura Tosihiko

  Research Institute For Scientific Measurement

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