KERAMISCHE ROTOREN FUER DRUCKWELLENTURBOLADER UND DEREN HERSTELLUNG.

摘要

Ceramic rotors for pressure wave type superchargers are disclosed, which have a honeycomb structure, wherein a material constituting partition walls of the honeycomb structure has an apparent density of 4.0 g/cm<3> or less, an open porosity of 3.0% or less, a coefficient of thermal expansion in a temperature range from room temperature to 800 DEG C being 5.5x10<-><6>/ DEG C or less, and a four point bending strength of 30 kg/mm<2> or more. A process for producing such ceramic rotors for pressure wave type superchargers is also disclosed. This comprises the steps of preparing a ceramic body in which an average particle diameter of a ceramic raw material is controlled to 1 to 10 mu m, extruding honeycomb structural bodies by press feeding the ceramic body through body feed holes and extruding channels having a width corresponding to a thickness of partition walls of the honeycomb structure in an extruding die, and drying, firing and grinding the thus extruded bodies.