Manufacture of shaped articles from refractory powder

Details Manufacture of shaped articles from refractory powder Manufacture of shaped articles from refractory powder

1987-12-30

1990-02-06

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

264175, 264234, C08B 3313

Patent

active

048987018

ABSTRACT:
A method of making a shaped article comprises mixing a refractory powder with an aqueous acidic phosphate solution, subjecting the mixture thus formed to high shear to form a plastic mass, shaping the mass, and hardening the shaped mass at a temperature below the sintering temperature of the refractory powder. By this method articles of useful hot-strength can be obtained without having to employ the high temperatures required for sintering.

REFERENCES:
patent: 3316110 (1967-04-01), Herbst
patent: 3352814 (1967-11-01), Collins et al.
patent: 4379108 (1983-04-01), Robertson
Cassidy, Phosphate Bonding Then and Now, Ceramic Bulletin, vol. 56, No. 7 (1977), pp. 640-643.
Fisher, Hot Strength of Phosphate Bonded Refractory Plastics, Ceramic Bulletin, vol. 56, No. 7, (1977), pp. 637-639.
O'Hara, Studies in Phosphate Bonding, Ceramic Bulletin, vol. 51, No. 7 (1972), pp. 590-595.
Gonzalez, Strength & Microstructure of Phosphate-Bonded Alumina Refractories.

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