1,Honeycomb ceramic substrate 2,use for car exhaust gas purifier 3,car use honeycomb ceramic 4,Round,Racetrack,Ovral 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 ...