Characteristics of reaction-bonded porous silicon nitride honeycomb for DPF substrate

Abstract

Silicon nitride (Si₃N₄) is a good candidate for a DPF substrate due to its excellent mechanical and thermal properties. A new process for producing porous silicon nitride is established and fundamental characteristics of fabricated silicon nitride honeycomb is evaluated, including mechanical properties and chemical stability against CeO₂ ash as well as pressure drop and soot regeneration behavior.