DLP-printed SiBOC ceramic components from preceramic polymers based on boric acid

This manuscript proposed a new approach to manufacture SiBOC ceramic samples with complex structures via DLP 3D printing technique from ceramic precursors. High ceramic yield photosensitive SiBOC resin for 3D printing was synthesized based on the condensation reaction of boric acid and siloxanes. The stability of printed block samples significantly improved by increasing the content of diethoxydimethyl silane. And this strategy was applicable to most systems of UV cured ceramic precursors. The DLP-printed SiBOC ceramics maintained high ceramic yield (>76 %) and exhibited perfect 25 % isotropic shrinkage after pyrolysis at 1000 ℃. They experienced only a 0.5 % weight loss in an argon environment at 1450 ℃, and exhibited better mechanical properties at 1000 ℃ compared to room temperature. The results indicated that the DLP-printed SiBOC ceramics had excellent thermal stability and mechanical properties, which could significantly expand the application range of SiBOC ceramics.