Bonded particulate ceramic materials and their manufacture

Details Bonded particulate ceramic materials and their manufacture Bonded particulate ceramic materials and their manufacture

1974-03-13

1977-11-01

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, C04B 3564

Patent

active

040565882

ABSTRACT:
Method for the manufacture of bonded and self-bonded bodies from certain particulate ceramic oxides or carbides by heating a shaped mixture containing the particulate ceramic material and from 1 to 10 percent of its weight of an additive which includes an organic moiety and an inorganic moiety and is non-polymeric in respect of the inorganic moiety, and undergoes decomposition on being heated under atmospheric pressure, said additive being exemplified by such organic compounds as aluminum-dibutyl phosphate; tris-(trimethylsiloxy)-aluminum; and diethyl-(triethoxy-silyl)-vanadate, to produce, by the thermal decomposition, an inorganic residue which remains substantially non-volatile up to temperatures at which the particles of the particulate ceramic material become self-bonding; the mixture containing the particulate ceramic material and additive being fired to a temperature of about 200.degree. to about 600.degree. C, at which the additive is thermally decomposed and the ceramic particles become bonded by the pyrolytic residue, and optionally further fired to a temperature between about 600.degree. and about 1800.degree. C at which the particles of the particulate ceramic material become self-bonding.

REFERENCES:
patent: 3179524 (1965-11-01), Hunter
patent: 3316108 (1967-04-01), Blomberg
patent: 3413232 (1968-11-01), Quinn
patent: 3549315 (1970-12-01), Lester et al.

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