【作者】 曾桂生； 谢刚； 杨大锦；

【Author】 Zeng Guisheng~*, Xie Gang, Yang Dajin(The Faculty of Materials and Metallurgical Engineering, Kunming; University of Science and Technology, Kunming 650093, China)

【机构】 昆明理工大学材料与冶金工程学院；

【摘要】 通过扫描电镜和电子探针分析钙熔盐电解中破损石墨阳极的结构和杂质。探索了其破损机理,认为主要是由于孔隙存在导致氧化和孔隙吸附电解质,电解质因水解、脱水等过程使其周围的石墨阳极颗粒受应力不平衡而发生破损。通过实验研制出适合于钙熔盐电解过程用的石墨阳极具有抗氧化性能的涂层,并对涂层进行了XRD,SEM分析和氧化失重实验。实验表明该涂层在680～750℃下成硼玻璃态,能渗透到石墨阳极孔隙中。涂层表面致密无裂纹且附着力强,因而具有较好的抗氧化能力。该涂层是一种适合钙熔盐电解的、性能优良的石墨阳极涂层。更多还原

【Abstract】 Microstructure and impurity of graphite anode in calcium molten salt electrolysis were investigated by SEM and electron probe. The holes of the graphite anode adsorbed the electrolyte in electrolysis of calcium molten salt, then the electrolyte hydrolyzed and dehydrated made the surrounding particles of them damaged for the imbalance stress as well as the oxidation of the active graphite particles on the anode surface. Through experiment a protection coating, which can be used for graphite anode in calcium molten salt electrolysis is developed, and XRD, SEM analysis and weigh loss experiment with oxidation of the coating were carried out. The results show that the coating is compact without crack and with strong adhesive, it demonstrated that the coating had a excellent oxidation resistance characteristics. It is a promising coating for electrolysis of calcium molten salt.更多还原