由铵盐制备高纯氟化钡的工艺研究

以氟化铵和氯化钡为原料，采用沉淀法制备了氟化钡。反应温度为25 ℃，反应时间为60 min，氯化钡初始质量分数为10%，氟化铵与氯化钡物质的量比为2.2，m(洗水)∶m(滤饼)=10∶1,可制备出纯度达99%以上的氟化钡。XRD谱图表明，样品氟化钡的所有衍射峰均与标准立方相氟化钡吻合，属立方晶系。该工艺流程简单，经济效益好。

Preparation technology of high purity barium fluoride from ammonium salt

Barium fluoride(BaF2) was prepared by precipitation method with ammonium fluoride and barium chloride as raw materials.BaF2 with purity of more than 99% can be prepared when reaction temperature is 25 ℃,reaction time is 60 min,initial mass fraction of barium chloride is 10%,amount-of-substance ratio of ammonium fluoride to barium chloride is 2.2,and the mass ratio of washing water amount to filter cake amount=10∶1.XRD pattern showed that all the diffraction peaks of barium fluoride sample were consistent with the standard cubic barium fluoride.Therefore it belongs to the cubic crystal system.The technology has short flow route and good economic benefits.