A trap usually contains a brick of heat-resistant ceramic (such as silicon carbide or cordierite) honeycombed with passages that are alternately blocked at opposite ends.

• 微粒捕集器通常包含一块蜂窝状结构的隔热陶瓷（例如碳化矽或堇青石），蜂窝结构内部通道的一端封死。