中文摘要：

主要开展了用Ca-CaCl2熔盐法制备低氧金属钇（Y）的研究。采用Ca-CaCl2熔盐法,在高温电阻炉内,利用溶解于CaCl2中的化学活性钙与氧的反应,除去钇中的氧,而熔融的CaCl2可降低副产品CaO的活度,从而得到低氧金属钇。通过对不同助熔剂用量、不同材质坩埚、不同脱氧时间、不同脱氧温度进行的研究,我们找到了在钇试样为5g时,用Ca-CaCl2熔盐法脱氧的最佳助熔剂用量为40g,较佳脱氧时间为7天,较佳脱氧温度为950℃,使用钽坩埚可以使块状的钇脱氧后的最低氧含量达到0.17%（质量分数,下同）,使氧的去除率达到了73%。

英文摘要：

In this paper, the extra- low- oxygen yttrium metal is prepared by Ca- CaCl2 molten salt method. The low- oxygen yttrium metal is obtained by using the reaction with chemically active calcium dissolved in CaCl2 and decreasing the activity of the by - product CaO in high - temprature resistance furnace use of Ca- CaCl2 molten salt method. We have found optimal flux content is 40g, better deoxidation time is 7 days, better deoxidation temperature is 950℃ via studying different flux content, different material - crucible, different deoxidation time, different deoxidation temperature when the yttrium metal sample is 5g. Pieces of yttrium metal are deoxidized to 0.17% oxygen content at lowest by use of tantaium crucible. Removal ratio of oxygen reaches 73%.