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Lightweight and strong silicon carbide (SiC) ceramics with complex lattice structures were fabricated by vat photopolymerization 3D printing technology followed by a one-step pyrolysis process. The UV-light penetration depth of the SiC ceramic slurries was increased more than three times based on the formation of SiC@SiO₂ core@shell structured particles through pre-oxidation processing. To reduce the sintering temperature and shrinkage of SiC ceramics, 40 vol% solid loading SiC@SiO₂ ceramic slurries mixed with photocurable resins containing 0–70 wt% of polysiloxane were prepared. SiC@SiO₂/SiOC ceramic with less than 8% linear shrinkage rate was obtained after pyrolysis at 1000–1200 ℃. The pyrolyzed SiC@SiO₂/SiOC lattice ceramics exhibited a specific strength of 4.6 × 10⁴ N m/kg with a cellular density of 0.87 g/cm³, surpassing various other lattice structures and porous ceramics with similar …