Co-firing of multiple materials results in the formation of internal stress due to the difference in shrinkage behavior. This internal stress causes retardation of sintering, crack formation and/or de-lamination at the interface. To reduce internal stress in layered structures, homogeneous pressing via centrifuge has been attempted. The effect of centrifugal pressing was demonstrated by film sintering, in which crack suppression and void removal by the present process were revealed. Owing to the homogeneous microstructure, the thermal stability of the film was significantly improved.
T. Ohji, T. Sekino and K. Niihara
Y. Kinemuchi et al., "Centrifugal Sintering", Key Engineering Materials, Vols. 317-318, pp. 19-22, 2006