用碳酸氢铵沉淀制备晶状碳酸钇的机理研究

Research on Mechanism of Preparation of Crystalline Yttrium Carbonate by Precipitation of Ammonium Bicarbonate

在一定的条件下 ,从硫酸钇溶液中用碳酸氢铵沉淀时 ,可制得水合晶状的正碳酸钇或水合的晶状碳酸钇铵复盐。通过化学组成分析、X射线粉末衍射、红外光谱、热分析和扫描电镜等检测手段 。

Crystalline hydrated yttrium carbonate and hydrated crystalline ammonium and yttrium carbonate compound are obtained by precipitation of yttrium sulphate solutions with different amount of ammonium bicarbonate under given conditions.The process and mechanism of conversion of amorphous precipitate into crystalline precipitate during precipitation and aging were studied by element anaysis,X-ray powder diffractometry,infra-red spectrometry,thermal analysis and scanning electron microscope.