摘要
以水合氟化钆为原料,氟化氢铵为添加剂,研究了脱水—转化法制备低氧氟化钆过程中氟化氢铵的作用及其氧含量的变化规律。结果表明,氟化氢铵在脱水过程中可以抑制水合氟化钆发生水解反应,在转化过程中可以将水解产物GdOF转化为GdF_3;在脱水后的物料中加入7%的氟化氢铵,产物中的氧含量可降低到0.09%;在一定温度和压力范围内,氟化钆中的氧含量随脱水温度、转化温度以及压力的升高而降低,300℃、300 kPa时达到最低值;转化过程中充入氩气可使氧含量达到0.088%。
Variation of oxygen content in preparation of low oxygen gadolinium fluoride process by dehydration - transformation methods were investigated using hydrated gadolinium fluoride as raw materials, NH4HF2 as addition agent. NH4HF2 can restrain the hydrolysis reaction of hydrated gadolinium fluoride and transform GdOF into GdF3. The oxygen content of product can be reduced to 0.09% with the addition of 7% NH4HF2 in the dehydrated materials. The oxygen content in gadolinium fluoride reduces with dehydration temperature, transform temperature and pressure increasing under certain the temperature and the pressure. The oxygen content of product can reach 0.088% by argon gas filled in transform process.
出处
《中国有色冶金》
北大核心
2010年第3期67-71,共5页
China Nonferrous Metallurgy
基金
内蒙古自治区高等学校科学研究项目(NJzy08125)
关键词
水合氟化钆
低氧氟化钆
脱水
转化
氧
hydrated gadolinium fluoride
low oxygen gadolinium fluoride
dehydration
transformation
oxygen
