Method for preparing conductive SiC ceramic based on pre-oxidation treatment and low-temperature sintering

• Main Authors: LI YAFEI, HE YANMING, WANG YAFENG, ZHENG YONG, LUO ZIQIANG, SHEN WEIJIAN, LI HUAXIN, LYU CHUANYANG, WEI LIANFENG, YANG JIANGUO, YANG FUQUAN
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention discloses a method for preparing conductive SiC ceramic based on pre-oxidation treatment and low-temperature sintering, and the method for preparing the conductive SiC ceramic through low-temperature sintering comprises the following steps: taking rare earth oxide as a sintering aid, mixing SiC powder and the rare earth oxide, performing pre-oxidation treatment, controlling the oxygen content increment to be 0.6-1.2 wt.% after the pre-oxidation treatment, and performing low-temperature sintering to obtain the conductive SiC ceramic. And carrying out sintering treatment at a temperature lower than 1900 DEG C in a nitrogen atmosphere to obtain the conductive SiC ceramic. The method provided by the invention not only breaks through the technical bottleneck that the sintering temperature of the existing conductive SiC ceramic is too high, but also further improves the mechanical properties of the conductive SiC ceramic, so that the method is suitable for large-scale industrial application and can be