Readily moldable or castable ceramic powders

Details Readily moldable or castable ceramic powders Readily moldable or castable ceramic powders

1989-03-09

1991-03-19

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 87, 501 88, 501 96, 501 97, 501108, 501126, 501127, 428403, 428404, 428220, C04B 3548

Patent

active

050010913

ABSTRACT:
Ceramic molding or casting powders, particularly nitride, oxide and carbide powders, that have substantial internal surface and volume produce improved dispersions after being coated with a cover material, such as polyethylene glycol, that reduces the specific surface area of the powder by at least about 10% and reduces the amount of penentration of the binder used for dispersion into the internal volume of the powder. The viscosity of dispersions of such coated powders, or of conventional uncoated ceramic powders, can be further reduced by treatment of the powders with organotitanate, organozirconate, or organosilane coupling agents that are chosen to interact favorably with the specific powders and binders used.

REFERENCES:
patent: 4144207 (1979-03-01), Ohnsorg
patent: 4207226 (1980-06-01), Storm
patent: 4289720 (1981-09-01), Yajima et al.
patent: 4485182 (1984-11-01), Enomoto et al.
patent: 4530808 (1985-07-01), Renlund et al.
patent: 4551496 (1985-11-01), Renlund et al.

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