Reduction of the Sintering Temperature for the Manufacturing of Carbon‐Rich Dense SiOC Bulk Ceramics

A major challenge in the processing of compact polymer derived ceramics is the removal of pores. Even after field‐assisted sintering (FAST) under pressure, a certain level of porosity remains within samples and parts. In order to reduce the porosity, a novel route is developed making use of the addition of trimethyl borate to a polysilsesquioxane‐type preceramic polymer system; trimethyl borate is a molecular boron oxide precursor. It is found...