Assertion: ceramic honeycomb | /r/HasProperty | coated with γ-alumina
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text: In general, a cordierite ceramic honeycomb is coated with an active substance, such as γ-alumina having a large specific surface area, and a noble metal, such as platinum, palladium, rubidium, etc. is deposited on the γ-alumina layer to form a honeycomb-shaped catalyst and the thus formed honeycomb-shaped catalyst is housed in a can composed of, for example, stainless steel and is arranged at a passageway of exhaust gas discharged from an internal combustion engine.