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The honeycomb ceramic carrier is the core component in the automobile exhaust after-treatment system and is placed in the three-way catalytic converter. In the 1970s, Corning Corporation of the United States invented the donkey bluestone honeycomb ceramic as a carrier for exhaust gas post-treatment catalyst coating, providing an efficient reaction center for exhaust gas post-treatment chemical reactions. The automotive exhaust after-treatment system has gradually developed with honeycomb ceramic carriers as the core. According to the different exhaust gas flow modes, honeycomb ceramic carriers are mainly divided into straight-through carriers and wall-flow carriers.