METHOD AND CASE FOR HYDROGEN PULVERIZING IN RARE EARTH MAGNETIC MATERIAL

Title:

METHOD AND CASE FOR HYDROGEN PULVERIZING IN RARE EARTH MAGNETIC MATERIAL

Document Type and Number:

Japanese Patent JP3120080

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To efficiently manufacture powder in a short time by specifying the heat conductivity of a case body to be used in pulverizing a rate earth magnetic material through the hydrogen occlusion to uniformly and rapidly conduct the heat.
SOLUTION: In a case for hydrogen pulverizing of a rare earth magnetic material, a case body 11 is a rectangular parallelepiped box formed of a copper plate of about 1.3 mm in thickness, and its heat conductivity is ≥1 W/cm.deg. A member 14 for heat conduction and radiation comprising three hollow copper pipes which are about 12 mm in outside diameter and about 9 mm in inside diameter and communicating with the outside atmosphere is fitted close to a center in height of side walls 12 between the shorter side walls 12 of the case body 11 in a condition where opening parts 14a on both ends communicates with an opening 12b made in the case side wall 12. Similarly, a member 14 for heat conduction and radiation comprising two hollow copper pipes of about 10 mm in outside diameter and about 8 mm in inside diameter is fitted between the longer side walls 12 above the hollow copper pipes in a condition where opening parts 14a on both ends communicate with an opening 12b provided in the case side wall 12.

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Inventors:

Yasuhiko Imai
Hiroki Tokuhara
Katsumi Okayama
Akiyasu Ohta
Akihito Tsujimoto

Application Number:

JP26539999A

Publication Date:

December 25, 2000

Filing Date:

September 20, 1999

Export Citation:

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Assignee:

Sumitomo Special Metal Co., Ltd.

International Classes:

B02C19/00; B22F9/04; H01F1/057; H01F1/06; (IPC1-7): B22F9/04; B02C19/00; H01F1/06

Domestic Patent References:

JP4147908A

Attorney, Agent or Firm:

Shimizu Yoshi Hiro (2 people outside)

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