Fabrication of low thermal expansion, high porosity cordierite b

Details Fabrication of low thermal expansion, high porosity cordierite b Fabrication of low thermal expansion, high porosity cordierite b

1991-12-06

1993-11-02

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

264 44, 264 66, 26417712, B29C 6500

Patent

active

052581500

ABSTRACT:
A body is made up of at least about 93% by weight cordierite, having a coefficient of thermal expansion of no greater than about 4.times.10.sup.-7 .degree.C.sup.-1, from about 25.degree. C. to about 800.degree.0 C., and a total porosity of greater than about 42%. A method for producing the body which includes selecting raw materials to form a composition which forms cordierite on firing, the raw materials being composed of: talc having a BET surface area of no greater than about 5 m.sup.2 /g, 0 to about 48% by weight of clay, which can be platelet clay, stacked clay which can be delaminated into platelets during processing, and mixtures thereof, an aluminum oxide yielding component having an average particle size of either about 3 to about 8 micrometers in diameter, or no greater than about 3 micrometers in diameter, and free silica, intimately blending the raw materials with an effective amount of vehicle and forming aids to impart plastic formability and green strength to the raw materials and to form a plastic mixture therefrom. If the particle size of the aluminum oxide yielding component is no greater than about 3 micrometers in diameter, the raw materials are blended additionally with a burnout agent. The raw materials are formed into a green body which is dried and fired at a sufficient temperature for a sufficient time to form the cordierite body.

REFERENCES:
patent: 3885977 (1975-05-01), Lachman et al.
patent: 4869944 (1989-09-01), Harada et al.

Affiliated with

Also associated with

Rating

Fabrication of low thermal expansion, high porosity cordierite b does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fabrication of low thermal expansion, high porosity cordierite b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabrication of low thermal expansion, high porosity cordierite b will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1755923