Method for producing high strength low expansion cordierite bodi

Details Method for producing high strength low expansion cordierite bodi Method for producing high strength low expansion cordierite bodi

1978-12-06

1980-11-25

Meros, Edward J.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

106 62, 264 66, C01B 3322, C04B 3504

Patent

active

042358558

ABSTRACT:
Synthetic cordierite (2MgO.2Al.sub.2 O.sub.3.5SiO.sub.2) ceramic bodies exhibiting high strength and low thermal expansion are produced by (1) pelletizing talc, clay and alumina in a ratio to yield a nearly stoichiometric composition, (2) sintering the pellets to form cordierite, (3) milling the pellets in non-contaminating media to about 1 to 10 microns particle size, (4) consolidating the particles, and (5) sintering to a polycrystalline body. Such bodies possess good to excellent thermal shock resistance, and are useful, for example, as components in gas turbine engines.

REFERENCES:
patent: 2281477 (1942-04-01), Chesny
patent: 2313746 (1943-03-01), Heany
patent: 3295937 (1967-01-01), Leschen
patent: 3979216 (1976-09-01), Fritsch et al.
patent: 4063955 (1977-12-01), Fritsch et al.

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