摘要
在金属镝的生产中,常用钙热还原法,为了降低生产成本,常用钨坩埚取代钽坩埚,虽然生产成本降低很多,但产品金属镝中,钨的含量每吨高达(1000～2000)×10-6。由于金属镝中存在大量的杂质钨,将其应用于某些功能材料中,杂质钨会对功能材料的性能造成影响,因此客户要求钨含量在500×10-6以下。通过控制灼减、提高真空设备的真空度,控制钙热反应温度和时间,特别是刚反应时采用降低加热功率一段时间,能获得含钨量不大于0.05%的金属镝。
The calcium -hot restoration law was in common used to manufacture metal dysprosium. In order to reduce production cost, the tantalum crucible was in common replaced by the tungsten crucible. Though production cost fell a lot, yet the content of impurity tungsten attained to （ 1 000 - 2 000） × 10^-6 in per ton metal dysprosium. Because of the impurity tungsten does harm to the performance of function materials, hence user required to decrease the content of impurity tungsten under 500 × 10^-6 in metals dysprosium. By means of controlling scorch - decrease, improving the vacuum degree of vacuum equipment, controlling temperature and time of calcium - hot reaction, especialiy degrading heat power for a moment at the beginning of reaction, so it was able to obtain metal dysprosium containing tungsten under 0.05%.
出处
《湖南冶金》
2006年第4期19-21,共3页
Hunan Metallurgy
关键词
金属镝
杂质钨
控制
metal dysprosium
impurity tungsten
controlling
