| 摘要 |
PROBLEM TO BE SOLVED: To make the thickness constant through a simple process and thereby ensure the uniform fine texture and the linearity by specifying the solid content to form a slurry consisting of very weakly flocculated ceramic particles and further, removing large-size particles and lumps through centrifugal sedimentation to perform the centrifugal molding and sintering of the slurry. SOLUTION: Ceramic powder is dispersed in a liquid solvent and salt is added to form a slurry consisting of very weakly flocculated ceramic particles with about 5-20 vol.% solid content. Next, the slurry is made to sediment centrifugally so that large-size particles and particle lumps or impurities are removed. Further, this slurry is entered in a cylindrical mold to be centrifugally molded and a tube is formed in the mold. After that, the liquid solvent collected in the center of the mold is unloaded. The centrifugal molding and a stage associated therewith are repeated until the tube of desired thickness is formed. Finally, the tube is sintered. Thus it is possible to manufacture the ceramic tube which has uniform thickness and fine texture with ensured linearity, even when a special device is not used. |
