MANUFACTURING METHOD OF FIBER CERAMICS IN EXTRUSION PROCESS

摘要

A fibrous ceramics fabrication method using a room extrusion process and a fibrous monolithic ceramics fabrication method using thereof is disclosed. The method includes the steps of obtaining a extrusion-purpose slurry by evenly mixing a hydrophilic cellulose bonding agent 3 to 7 and a hydrophilic organic plasticizer 5 to 20 for improving a formation property by softening the cellulose bonding agent with a distilled water 45 to 55, with regard to a weight percent 100 of a ceramic powders selected from a group of silicon nitride, silicon carbide and alumina, carrying out a room temperature extrusion from the extrusion-purpose slurry, and coating the fiber by passing through a mixedly dispersed coating-purpose slurry a ceramic powders 20 to 45 selected from a group of boron nitride and graphite, an organic dispersant 0.5 to 3 for the dispersing by forming a repulsive force between the ceramic grains within the nonaqueous solvent, and a bonding agent 2 to 10 for improving adhesivity and strength of the formed coating layer, with regard to a nonaqueous solvent 100, thereby enabling a fibrous monolithic ceramics having a structure inhibiting a catastrophic fracture of the ceramics to be easily fabricated in a lower cost.