The invention belongs to the technical field of
ceramic manufacturing, and provides a temperature-air pressure
coupling sintering process for photocuring complex-configuration
ceramic. A multi-stage
sintering path is taken as a core, temperature and air pressure curves are matched and coupled, three stages of low temperature,
liquid phase formation and high-temperature densification are set, different heating rates and heat preservation platforms are configured in key temperature areas T1, T2 and T3 corresponding to low air pressure P1, medium air pressure P2 and
high air pressure P3, and gas
discharge,
liquid phase promotion and densification are cooperatively realized. Local
temperature and pressure micro-adjustment is achieved by adjusting the furnace chamber partition
heating power and the gas inlet and outlet rate, and the diversified requirements for
sintering large-wall-thickness
solid pieces, lattice structural pieces, small rod pieces and the like in the same furnace are met; on-line monitoring and closed-
loop control are combined, and automatic adjustment and stable operation are achieved. Compared with a traditional single temperature-
pressure curve process, the sintering consistency and stability of the
ceramic part with the complex structure can be remarkably improved, the defect risk is reduced, and the method is suitable for
batch manufacturing of multiple types of complex geometric ceramic parts.