Honeycomb ceramic substrate Made of cordierite 300,400,600cells Round,Racetrack,ellipse,abnormity Honeycomb ceramic substrate (Used In Vehicle)Honeycomb ceramic substrate is made of cordierite, and it is used for car catalytic converter. We can supply both ceramic element coated with noble metals of Pt, Pd, Rh and ceramic element without noble metals. 1. The honeycomb ceramic substrate have a ...