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熔盐电解法是一种通过加载电压直接将金属从其氧化物中还原实现金属冶炼的方法。在CaCl2-NaCl混合熔盐中,以致密ZrO2陶瓷板为阴极,石墨为阳极,采用熔盐电解法在850℃,3.1V电压条件下对陶瓷板进行电解,通过还原ZrO2直接在陶瓷表面生成一层锆金属,实现了致密ZrO2陶瓷表面的金属化。采用XRD研究了电解不同时间后的陶瓷表层物相,分析表层不同深度电解产物的含量,结果表明,电解反应由外向内进行,电解脱氧层厚度随着电解时间增加而增加,脱氧程度也更彻底。初步探讨了熔盐电解法机理,提出氧化锆陶瓷表面氧的离子化是受到了强制双电层的吸引的设想。
Molten salt electrolysis is a method of metal smelting by directly reducing the metal from its oxide by applying a voltage. In the mixed molten salt of CaCl2-NaCl, the dense ZrO2 ceramic plate as the cathode and graphite as the anode, using molten salt electrolysis at 850 ℃, 3.1V voltage on the ceramic plate electrolysis, reduction by ZrO2 directly on the ceramic surface to generate a Zirconium metal, to achieve a dense ZrO2 ceramic surface metallization. XRD, XRD and XRD were used to study the surface morphology of the ceramic after electrolysis for different time. The results showed that the electrolysis reaction proceeded from the outside to the inside, the thickness of the electroless deoxy layer increased with the increase of the electrolysis time and the degree of deoxidation was more thorough . The mechanism of molten salt electrolysis was discussed preliminarily. It was proposed that the ionization of oxygen on the surface of zirconia ceramics was envisaged by the forced electric double layer.