Title:
METHOD FOR REFINING METAL
Document Type and Number:
WIPO Patent Application WO/2010/013484
Kind Code:
A1
Abstract:
Disclosed is a method for refining a metal, comprising applying an electron beam to a base metal to melt the base metal and solidify the melted base metal to refine the base metal. The method comprises the steps of applying the electron beam to the whole area of the surface of the base metal placed within a water-cooled crucible disposed in a high-vacuum atmosphere to melt the whole base metal, gradually lowering the power output of the electron beam while applying the electron beam to the melted base metal to gradually solidify the melted base metal from the bottom of the melted base metal toward the surface of the melted base metal on the electron beam application side, and allowing the melted base metal to solidify to a predetermined extent and removing the melted base metal part remaining unsolidified.
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Inventors:
OOKUBO, Yasuo (Inc. Tsukuba Institute for Super Materials, 5-9-6, Tokodai, Tsukuba-sh, Ibaraki 35, 〒3002635, JP)
大久保裕夫 (〒35 茨城県つくば市東光台５－９－６ 株式会社アルバック 筑波超材料研究所内 Ibaraki, 〒3002635, JP)
HIROSE, Youichi (Inc. Tsukuba Institute for Super Materials, 5-9-6, Tokodai, Tsukuba-sh, Ibaraki 35, 〒3002635, JP)
大久保裕夫 (〒35 茨城県つくば市東光台５－９－６ 株式会社アルバック 筑波超材料研究所内 Ibaraki, 〒3002635, JP)
HIROSE, Youichi (Inc. Tsukuba Institute for Super Materials, 5-9-6, Tokodai, Tsukuba-sh, Ibaraki 35, 〒3002635, JP)
Application Number:
JP2009/003629
Publication Date:
February 04, 2010
Filing Date:
July 30, 2009
Export Citation:
Assignee:
ULVAC, Inc. (2500, Hagisono Chigasaki-sh, Kanagawa 43, 〒2538543, JP)
株式会社アルバック (〒43 神奈川県茅ヶ崎市萩園２５００ Kanagawa, 〒2538543, JP)
OOKUBO, Yasuo (Inc. Tsukuba Institute for Super Materials, 5-9-6, Tokodai, Tsukuba-sh, Ibaraki 35, 〒3002635, JP)
大久保裕夫 (〒35 茨城県つくば市東光台５－９－６ 株式会社アルバック 筑波超材料研究所内 Ibaraki, 〒3002635, JP)
株式会社アルバック (〒43 神奈川県茅ヶ崎市萩園２５００ Kanagawa, 〒2538543, JP)
OOKUBO, Yasuo (Inc. Tsukuba Institute for Super Materials, 5-9-6, Tokodai, Tsukuba-sh, Ibaraki 35, 〒3002635, JP)
大久保裕夫 (〒35 茨城県つくば市東光台５－９－６ 株式会社アルバック 筑波超材料研究所内 Ibaraki, 〒3002635, JP)
International Classes:
C22B9/22; B22D25/04; B22D27/02; B22D27/04; C01B33/037
Attorney, Agent or Firm:
SHIGA, Masatake et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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