PRODUCTION OF SILICON CARBIDE MOLDING

Title:

PRODUCTION OF SILICON CARBIDE MOLDING

Document Type and Number:

Japanese Patent JPH0234560

Kind Code:

A

Abstract:

PURPOSE: To obtain the silicon carbide molding which is tough and wrinklefree even if the molding is thin by placing the sheet of a silicon carbide precursor polymer on an air permeable support and crosslinking and insolubilizing the sheet, then calcining the sheet.

CONSTITUTION: A polycarbosilane/styrene copolymer is used as the silicon carbide precursor and is heated to melt in a nitrogen atmosphere of about ≤10ppm oxygen concn. The copolymer is defoamed in a vacuum of about 0.5Torr. The deformed copolymer melt is extruded from a die having a slit shape to form the sheet 1 of the polycarbosilane/styrene copolymer. This sheet 1 is placed on the support having air permeability, for example, a wire net 2 of about 10 mesh and is heated in an air atmosphere to crosslink and insolubilize the sheet, following which the sheet is heated and calcined in a nitrogen atmosphere of about 10ppm oxygen concn., by which the flat molding of the silicon carbide sheet is obtd.

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Inventors:

NISHIKAWA MIKIO
KINOSHITA SAIJIRO
TAKAKURA ISAO
SHIMADA KEIZO

Application Number:

JP18344988A

Publication Date:

February 05, 1990

Filing Date:

July 25, 1988

Export Citation:

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Assignee:

TEIJIN LTD

International Classes:

C04B35/571; C04B35/56; (IPC1-7): C04B35/56

Attorney, Agent or Firm:

Maeda Junhiro

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