Process for producing a power composition for producing sintered ceramic articles
AssigneeIbiden Co., Ltd.
InventorsRyo Enomoto, Kiyotaka Tsukada
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Abstract
A powder composition for producing sintered ceramic, which composition contains fluororesin powder which has not been used in the prior art as one of the materials constituting a molding assistant to be blended in the composition. With this composition, it is possible to produce a high-density green molding with few molding defects under a relatively low molding pressure. The invention also provides a process for producing such a composition.
Claims10
A process for producing a powder composition for producing sintered ceramic, which comprises supplying 100 parts by weight of a ceramic powder composed of one or more components and 0.5 to 15 parts by weight of a fluororesin to a liquid dispersion medium so that the volume ratio of solid matter consisting of said ceramic powder and fluororesin in the suspension will be within the range from 5 to 501, subjecting the mixture to a uniform dispersion treatment by adding a dispersant, giving to said suspension a pressure difference enough to overcome the stagnation of a sieving action due to a pressure less caused between the portions of the suspension on the fore and the rear sides of the sieve, passing the suspension through a sieve having a mesh size of 65 .mu.m or less by giving vibrations to the suspension, and after the sieving treatment making the suspension into grannules having a powder bulk density equivalent to 5 to 46% of the theoretical value, and an average particle size within the range from 0.02 to 0.8 mm.
Dependencies are inferred from the claim text.