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LIGHT-TRANSMISSIVE POLYCRYSTALLINE MATERIAL AND METHOD FOR PRODUCING THE SAME

Foreign code F120006958
File No. S2009-0216
Posted date Oct 26, 2012
Country WIPO
International application number 2009JP007279
International publication number WO 2010/073712
Date of international filing Dec 25, 2009
Date of international publication Jul 1, 2010
Priority data
  • P2008-329934 (Dec 25, 2008) JP
Title LIGHT-TRANSMISSIVE POLYCRYSTALLINE MATERIAL AND METHOD FOR PRODUCING THE SAME
Abstract

Provided is a method for producing a light-transmissive polycrystalline material wherein a suspension (slurry 1) is prepared by suspending, in a solution, a starting powder which comprises optically-anisotropic single crystal grains to which a rare earth element has been added. A molded article is obtained from the suspension by slip casting within the space of a magnetic field. The temperature is controlled at this time such that the single crystal grains demonstrate a predetermined magnetic anisotropy while a static magnetic field or a rotary magnetic field is selected and applied in the direction of the easy axis of magnetization of the single crystal grains. The molded article is baked to obtain a light-transmissive polycrystalline material having a polycrystalline structure wherein the crystal orientation is controlled. During this baking step, the molded article is subjected to primary sintering at a temperature of 1,600 to 1,900 K and the primary sintered compact is then subjected to hot isostatic pressing (HIP treatment) at a temperature of 1,600 to 1,900 K.

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION, NATIONAL INSTITUTES OF NATURAL SCIENCES,
  • GENESIS RESEARCH INSTITUTE, INCORPORATED,
  • TAIRA, TAKUNORI,
  • AKIYAMA, JUN,
  • ASAI, SHIGEO,
  • HARA, KUNIHIKO
  • Inventor
  • TAIRA, TAKUNORI,
  • AKIYAMA, JUN,
  • ASAI, SHIGEO,
  • HARA, KUNIHIKO
IPC(International Patent Classification)

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