Media agitating mill and method for milling ceramic powder

Details Media agitating mill and method for milling ceramic powder Media agitating mill and method for milling ceramic powder

1992-09-14

1993-05-25

Bell, Mark L.

Compositions

Piezoelectric

501134, C04B 3500

Patent

active

052137023

ABSTRACT:
Provided is a method for milling ceramic powder which comprises wet-milling at least one ceramic powder by a media agitating mill wherein the volume of liquid is 4 times or less the net-volume of the ceramic powder. A dispersing agent is added and milling is carried out using grinding media of 1 mm, or less, in diameter. Further, a media agitating mill used for the above method is provided which comprises a milling chamber, grinding media and an agitator wherein the peripheral speed of the agitator is 10 m/s or more, the grinding media have a diameter of 1 mm or less and packing fraction of the grinding media is 65-85 vol %. A method for making a sintered body from fine powder produced by the above milling method is also disclosed.

REFERENCES:
patent: 3311310 (1967-03-01), Engel et al.
patent: 3337140 (1967-08-01), Wahl
patent: 3682399 (1972-05-01), Kaspar et al.
patent: 3927837 (1975-12-01), Clark
patent: 4513917 (1985-04-01), Szkaradek
patent: 4915307 (1990-04-01), Klimaschka et al.
"Zairyo (materials)", Tanaka et al., vol. 35, pp. 54-58.
"Powder--Theory and Application", revised second edition, published 1979, by Maruzen Co., Ltd., Japan.

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