| 摘要 |
PURPOSE:To obtain ceramic/ceramic composite material in which both a matrix phase and a dispersion phase are sintered together at high density and the physical properties are excellent thermally or electrically besides mechanical properties by dispersing a dispersion particles which are small in shrinkage at a time of sintering into the matrix particles, and co-sintering them. CONSTITUTION:After mixing a sintering auxiliary and a binder with ceramic powder becoming a matrix phase, the mixture is granulated to obtain granulated powder 10. (A) On the other hand, ceramic powder 12 becoming a dispersion phase is regulated so that its shrinkage is made smaller than that of granulated ceramic powder becoming the matrix phase at a time of sintering by controlling the amount of the binder. (B) Then both the granulated powder 10 and the powder 12 are molded by an ordinary method to obtain a molding 14 consisting of the dispersion phase 18 and the matrix phase 16. (C) Then this molding 14 is heated in a dewaxing process to decompose and remove the organic binder contained in the molding 14. (D) In this case, the phase 16 and the phase 18 shrink together by sintering but such effect that compressive pressure 20 due to shrinkage is concentrated in the phase 18 is caused. (E) The phase 16 and the phase 18 are sintered together to obtain a high-density sintered body 22. |
