About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Sintering Behavior of Non-Shrinkage and Low Pyroplastic Deformation Porous Ceramics |
Author(s) |
Nobuaki Kamochi, Shoutarou Kamura, Sridhar Komarneni |
On-Site Speaker (Planned) |
Nobuaki Kamochi |
Abstract Scope |
Pyroplasticity and shrinkage are important factors in the manufacture of high precision ceramic products. We have developed a non-shrinkage, low pyroplastic deformation porous ceramic by adding appropriate amounts of lime (CaCO3) and Corundum (Al2O3) to porcelain clay. In this study, the sintering behavior and porous properties of high-precision porous ceramics were investigated. When the firing temperature exceeded 1100℃, gehlenite and anorthite were crystallized and anorthite increased as the firing temperatures rose. These Ca based crystals suppressed the increase of liquid phase and firing shrinkage in the liquid sintering stage. The average pore diameter increased with increase in firing temperature and reached a pore diameter of 6.7 µm at 1300°C with a porosity of 29 %. The microstructure of fractured surface indicated that bloating like phenomenon occurred. However, anorthite crystals were well developed in the porous structure and restrained rapid bloating and firing deformation. |