In this study, the scope of ZnO cold sintering was extend to study the feasibility of processing size scale–up ceramic/polymer composite. In the case of the ZnO and aramid nanofiber composite (Figure 2b and g), the relative density was also above 96% and yellowish sample color was originated from the dispersion of aramid nanofiber in the ceramic matrix. Although 0 minute isothermal dwell time was used, the larger grain growth comparing to the pure ZnO at 15 minutes can be relevant to the following factors.