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

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.