Influence of EDTA on the Morphology of Barium Carbonate Using High Gravity Technology

• 作 者: 刘树信 王海滨 霍冀川 刘铭
• 机 构: Department of Chemistry and Chemical Engineering, Mianyang Normal University,State Key Laboratory Cu
• 出 处: 结构化学
• 发表日期: 2012年10期
• 关键词: spherical carbonate gravity adding orthorhombic cylindrical barium irregular rot

The superfine BaCO3 particles were synthesized by high gravity technology with BaCl2·2H2O and Na2CO3 as the raw materials. The changes of particle size and morphology were studied by adding different amount of EDTA, and rod-like, near-spherical and cylindrical shape BaCO3 were prepared. The BaCO3 particles were analyzed and characterized by TG/SDAT, SEM, XRD and FT-IR. The results indicated that the crystal transformation temperature and decomposition temperature of BaCO3 had increased because of EDTA addition. With the increase of EDTA amount, the shape of BaCO3 changed from irregular rod-like to near-spherical then to cylindrical shape. All different shape BaCO3 adopts orthorhombic crystal systems.

The changes in particle size and morphology were studied by adding different amounts of EDTA, and rod-like, near-spherical and cylindrical shapes BaCO3 were The results indicated that the crystal transformation temperature and decomposition temperature of BaCO3 had increased because of EDTA addition. With the increase of EDTA amount, the shape of BaCO3 changed from irregular rod-like to near-spherical then to cylindrical shape. All different shape BaCO3 adopts orthorhombic crystal systems.