INNER SHEET FOR CARBON CRUCIBLE USING FLEXIBLE EXPANDED GRAPHITE SHEET OF HIGH PURITY, AND MANUFACTURING METHOD THEREFOR

Title:

INNER SHEET FOR CARBON CRUCIBLE USING FLEXIBLE EXPANDED GRAPHITE SHEET OF HIGH PURITY, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

Japanese Patent JP2008002800

Kind Code:

A

Abstract:

To provide an inner sheet for a carbon crucible using a flexible expanded graphite sheet of high-purity, and a manufacturing method therefor.

This inner sheet for the carbon crucible is a flexible inner sheet for the carbon crucible using the flexible expanded graphite sheet having bulk density of 0.7-1.3 g/cm3, thickness of 0.2-1.0 mm, impurity content of 5 ppm or less, and an axisymmetric shape. The expanded graphite sheet may be non-axisymmetric one. This manufacturing method for the inner sheet for the carbon crucible is a method of purifying up to the high purity the expanded graphite sheet having 0.7-1.3 g/cm3 of bulk density and 0.2-1.0 mm of thickness, after worked into the axisymmetric shape, so as to reduce the impurity content to 5 ppm or less.

More Like This:

JPS5528488

INDUCTION FURNACE FOR CRUCIBLE

Inventors:

HIROSE YOSHIAKI
IMOTO HIDENORI

Application Number:

JP2007204045A

Publication Date:

January 10, 2008

Filing Date:

August 06, 2007

Export Citation:

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Assignee:

TOYO TANSO CO

International Classes:

F27B14/08; C01B31/04; C04B35/52; C30B15/10

Attorney, Agent or Firm:

Yoshiyuki Kaji
Makoto Suhara
Yasuhiro Nara

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