- Patent Title: Rare earth regenerator material particle, rare earth regenerator material particle group, and cold head, superconducting magnet, examination apparatus, and cryopump using the same
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Application No.: US17240687Application Date: 2021-04-26
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Publication No.: US11692117B2Publication Date: 2023-07-04
- Inventor: Katsuhiko Yamada , Keiichi Fuse
- Applicant: KABUSHIKI KAISHA TOSHIBA , TOSHIBA MATERIALS CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA TOSHIBA,TOSHIBA MATERIALS CO., LTD.
- Current Assignee: KABUSHIKI KAISHA TOSHIBA,TOSHIBA MATERIALS CO., LTD.
- Current Assignee Address: JP Tokyo; JP Yokohama
- Agency: Foley & Lardner LLP
- Priority: JP 12224522 2012.10.09
- Main IPC: C09K5/14
- IPC: C09K5/14 ; C22C1/04 ; B22F9/08 ; C22C1/047 ; C09K5/08 ; F17C5/00 ; H01F6/04
Abstract:
A rare earth regenerator material particle and a regenerator material particle group having a high long-term reliability, and a superconducting magnet, an examination apparatus, a cryopump and the like using the same are provided. A rare earth regenerator material particle contains a rare earth element as a constituent component, and in the particle, a peak indicating a carbon component is detected in a surface region by an X-ray photoelectron spectroscopy analysis.
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