Isuzu Ceramics Research Institute Co. Ltd.

Yasuaki Unno

Hideki Kita

Hideo Kawamura

Kazuo Oosumi

Isao Naito

Hideo Yamamuro

Exhaust gas purifying device and method for purifying exhaust gas

A low frictional ceramic material for sliding member, consists essentially of oxide of aluminum (Al) and oxide of zirconium (Zr) and contains oxide of cerium (Ce). Aluminum (Al) content is 50 to 75 wt. % in terms of alumina (Al.sub.2 O.sub.3), zirconium (Zr) content is 20 to 45 wt. % in terms of zirconia (ZrO.sub.2), and cerium (Ce) content is 3 to 20 wt. % in terms of ceria (CeO.sub.2)in said low frictional ceramic material for sliding member. Instead of oxide of aluminum (Al) and oxide of zirconium (Zr), it is capable to use a .alpha.-sialon.

Low frictional ceramic material for sliding member

A slidably engaged surface of a sliding member has a first travel length portion formed of a composite material providing a small contact angle with respect to lubricating oil and an adjoining second travel length portion formed of a composite material providing a higher contact angle with the lubricating oil. The first length portion preferably corresponds to boundary and mixed lubricating areas and the second length portion corresponds to a fluid lubricating area.

Low friction engine cylinder and production method therefor

The present invention provides a low-friction ceramic having a lowered coefficient of friction and an enhanced strength. The ceramic comprises as the matrix phase a nonoxide ceramic containing silicon, such as Si.sub.3 N.sub.4 or SiC and an iron compound in an amount of about 5 to 40% by weight dispersed in the matrix phase. This ceramic is excellent in the ability to adsorb lubricating oil, has a low coefficient of friction, is almost free from pores, and has a strength equal to or higher than that of a ceramic containing no iron oxide.

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Kanagawa, Japan

Yasuaki Unno