Sintered ceramic filter structure having body compressively stre

Details Sintered ceramic filter structure having body compressively stre Sintered ceramic filter structure having body compressively stre

1986-06-23

1988-03-22

Nozick, Bernard

Gas separation

Specific media material

Ceramic or sintered

55DIG30, 60311, B01D 3906

Patent

active

047325933

ABSTRACT:
A sintered ceramic structure for cleaning noxious substances contained in the exhaust gases emitted by an internal combustion engine is disclosed. The stucture comprises: an exhaust-gas cleaning portion including a multiplicity of pores through which the exhaust gas is discharged and an exhaust-gas inlet portion and an exhaust-gas outlet portion; an external wall portion being integrally disposed around the outer periphery of the exhaust-gas cleaning portion except for both the exhaust-gas inlet portion and the exhaust-gas outlet portion of the exhaust-gas cleaning portion; the exhaust-gas cleaning portion and the external wall portion being constituted by ceramics; and the ceramics of the external wall portion being composed of a sintered ceramic material having a sintering-shrinkage ratio smaller than that of the ceramics of the sintered ceramic material of the noxious gas cleaning portion, whereby upon sintering a residual compressive stress is imparted to the external wall portion due to the difference between the sintered-shrinkage ratios.

REFERENCES:
patent: 4207371 (1980-06-01), Otto
patent: 4363644 (1982-12-01), Sato et al.
patent: 4390355 (1983-06-01), Hammond, Jr. et al.
patent: 4396565 (1983-08-01), Tomita et al.
patent: 4420316 (1983-12-01), Frost et al.
patent: 4436538 (1984-03-01), Tomita et al.
patent: 4540535 (1985-09-01), Tomita et al.
patent: 4604869 (1986-08-01), Yoshida et al.

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