High‐Precision Multishaped Ceramic Parts Achieved by Optimizing Material Extrusion Process Parameters and Nonuniform Compensation Design

In this work, the optimized process parameters of material extrusion are used to print ceramics containing various typical‐shaped structures (triangular, square, hexagonal, and circular) and evaluated for precision. Typical multishaped ceramics are printed by selecting optimized process parameters, and the dimensional shrinkage of different shapes are measured. Based on the dimensional shrinkage results, the typical multishaped ceramics combining nonuniform compensation design is printed to evaluate the dimensional precision, straightness, angles, and roundness of the internal tiny shapes, including triangular, square, hexagonal, and circular. The results show the superior levels of the nozzle inner diameters are from 0.41 to 0.61 mm, and height to diameter ratios are from 50% to 70%, filling rates are from 60% to 100%, and printing speeds are from 15 to 25 mm s −1 . Typical multishaped ceramics printed using the optimized parameters has a total dimensional shrinkage less than 8% for large shapes, while a dimensional shrinkage above 11% for tiny shapes. After nonuniform dimensional compensation design for different tiny shapes, the deviations from the desired dimensions are reduced to within 3%. In addition, straightness, angles and roundness deviations are within 90 μm, 3.50°, and 160 μm, respectively, indicating that the ceramics possess good dimensional and shape precision.