▎ 摘　　要

Dispersing graphene into ceramics is an effective way to increase the emissivity of ceramics. In this study, a series of high-emissivity ZrO2/graphene composite ceramic blocks with different graphene content are successfully synthesized through combustion synthesis and spark plasma sintering (SPS), in which Mg powder, ZrO2 powder and CO2 gas are used as raw materials. Infrared performance studies show that, at room temperature, the emissivity of SPSed ZrO2/graphene over 3-8 mu.m band is up to 0.927. The peak wavelength of ZrO2/graphene at 470 degrees C is the same as that of moxibustion, which is similar to 33.98 mu.m. The optimal composition is a ZrO2/graphene ceramic sample with a content of Mg = 14.3 wt % in raw powder. At 470 degrees C, its spectral integral intensity could reach 88.0 % of that of moxibustion. And the ZrO2/graphene composite ceramic block shows better oxidation resistance compared with powder. After 15 h heat treatment (470 degrees C), the integral emissivity of bulk is basically unchanged, and it is 1.50 times than that of the powder. Using the ZrO2/graphene ceramic as emission source in the moxibustion instrument developed by us can achieve the therapeutic effect. (C) 2022 The Ceramic Society of Japan. All rights reserved.