ガラス微粒の熱間圧縮焼結(2)

抄録

Glass beads of equal sizes are sintered in a small cylindrical vessel under compressive load. The relations among the diameter of bead, load, sintering time and the lowest sintering temperature are determined by the method described in the former report (1). The dia-meters of beads tested are 1.30, 0.85 and 0.45mm.
The ratio of the diameter of the adhered area between two beads to the diameter of the bead is found to take a certain value independent of the dimention of the bead under the same load, but it becomes larger with the load. If the degree of sintering could be determined by this ratio, it would be that the smaller the beads, the lower the sintering temperature under the same sintering time and load. The formura, which had been obtained theoretically by the author expressing the rate of growth of the adhered area between two beads is in agreement with the experimental results regardless of the dimention of the bead from which it can be said that viscous flow is the main part of the mechanism of bonding in case of the hot-press sintering of glass beads.