Process for firing ceramic honeycomb structural bodies

Details Process for firing ceramic honeycomb structural bodies Process for firing ceramic honeycomb structural bodies

1992-09-21

1993-11-16

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 63, 264 65, C04B 3514

Patent

active

052621022

ABSTRACT:
A ceramic honeycomb structural body-firing process includes the steps of: formulating a raw material from talc, kaolin and other cordierite-forming materials to give cordierite having a chemical composition of SiO.sub.2 : 42-56% by weight, Al.sub.2 O.sub.3 : 30-45% by weight and MgO: 12-16% by weight as a main component and a crystalline phase mainly composed of cordierite, shaping a honeycomb structural body from the resulting mixture by extrusion, and firing the honeycomb structural body. In the firing step, a heating rate in a temperature range in which the honeycomb structural body is thermally shrunk is set at not less than 20.degree. C./hr but not more than 60.degree. C./hr, the heating rate in a temperature range in which the solid phase reaction of the honeycomb structure body proceeds is set at not less than 80.degree. C./hr but not more than 130.degree. C./hr, and the heating rate in a temperature range in which the liquid phase reaction of the honeycomb structural body proceeds is set at not less than 20.degree. C./hr but not more than 60.degree. C./hr.

REFERENCES:
patent: 3950175 (1976-04-01), Lachman et al.
patent: 4280845 (1981-07-01), Matshisa
patent: 4353854 (1982-10-01), Oyamada
patent: 5046946 (1991-09-01), Yasuda
patent: 5114644 (1992-05-01), Beall

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