optimization of processing parameters and heat treatment about the stereolithography fabrication of many kinds of oxide ceramics, such as Al\({}_{2}\)O\({}_{3}\)[10; 11; 12; 13; 14; 15], ZrO\({}_{2}\)[16; 17; 18; 19; 20], ZTA [21; 22; 23], SiO\({}_{2}\)[24; 25; 26], and other ceramics with light color [27; 28; 29; 30] have been widely reported. However, the photo-shaping method of non-oxide ceramics (often in deeper color) still faces tough challenges. [PERSON] et al. [31; 32] firstly used stereolithography technique to produce ceramics and deduced the corresponding formulas basing upon the Beer-Lambert law, from which the relationship between cure depth (\(C_{d}\)), average particle size (\(d\)), volume fraction (\(\Phi\)), scattering efficiency term (\(Q\)), incident light intensity (\(E_{0}\)) and the minimum intensity required to achieve photocuring (\(E_{c}\)) is revealed:  
\[C_{d}\propto\frac{d}{\Phi}\frac{1}{Q}ln\frac{E_{0}}{E_{c}} \tag{1}\]  
where \(Q\) is a function of the refractive index difference between ceramic powder and the photocurable liquid media:  
\[Q=\beta(n_{cermic}-n_{solution})^{2} \tag{2}\]  
In their work they also tried to shape Si\({}_{3}\)N\({}_{4}\) but failed, and they attributed it to the high refractive index of Si\({}_{3}\)N\({}_{4}\) powder (\(n_{Si_{3}N_{4}}=2.1\)) which resulted in poor cure depth. [PERSON] and [PERSON] [33; 34] pointed out that the larger the absorbance value of ceramic powder, the worse curing behavior of slurry will exhibit. They observed that the curing ability of SiC slurries increased with the increasing of particle size and the decreasing of solid loading. Finally, they successfully prepared gray-colored SiC ceramic green body with pyramid and hollowed basket structures, by using a maximum solid loading of 35 vol.% slurry in which the 15 \(\upmu\)m coarse SiC powder was dispersed. [PERSON] et al. [35] used DLP method to fabricate Si\({}_{3}\)N\({}_{4}\) gear with a relative density \(\geq\)90% by means of surface oxidation of Si\({}_{3}\)N\({}_{4}\) powder. They reported that as the oxidation degree of Si\({}_{3}\)N\({}_{4}\) powder increased, the light absorbance and refractive index both reduced. [PERSON] et al. [36] found that the maximum solid loading of the Si\({}_{3}\)N\({}_{4}\) slurry can be improved notably from 35 vol.% to 45 vol.% by the surface modification of submicron Si\({}_{3}\)N\({}_{4}\) powder with the silane coupling agent KH560. They discussed the effects of applied energy dose and solid loading on cure depth of Si\({}_{3}\)N\({}_{4}\) slurries in their paper, however, there are also many other factors which were not mentioned by them. [PERSON] et al. [37] fabricated complicated Si\({}_{3}\)N\({}_{4}\) ceramic parts through polymer-derived ceramics (PDCs) route by using a blend of liquid photocurable polysilazane and acrylic resin without ceramic particles added as raw material. Although it is a novel method to form Si\({}_{3}\)N\({}_{4}\) green body, this route did not involve the questions about the dispersion of powder and the scattering and absorption of light produced by the interaction of incident light with ceramic particles. Therefore, the emphasis of this study was put on the shaping of Si\({}_{3}\)N\({}_{4}\) green parts through DLP-based stereolithography by using ceramic powder not the precursor. The effects of powder characteristics, solid loading, monomer type and temperature on the slurries' performance (rheological behavior and curing ability) were analyzed in detail. Finally, Si\({}_{3}\)N\({}_{4}\) ceramic green parts with complex shapes were successfully fabricated. The study of binder burn-out and sintering, as well as mechanical performance, has to be further investigated in more detail in our future work.