磁场对碳酸钙结晶过程及晶型影响的研究  

Study on effect of magnetic field on crystallization of CaCO_3

作　　者：董倩倩[1,2] 张德强[3] 刘振法[2] 李海花[2] 

机构地区：[1]河北师范大学化学与材料科学学院,河北石家庄050016 [2]河北省科学院能源研究所,河北石家庄050081 [3]河北省科学院,河北石家庄050081

出　　处：《河北科技大学学报》2011年第3期277-280,共4页Journal of Hebei University of Science and Technology

基　　金：河北省自然科学基金资助项目(B2007000956);河北省科技支撑计划项目(09213906D)

摘　　要：通过测定电导率变化研究了磁场对碳酸钙结晶过程的影响,利用扫描电子显微镜(SEM)和X射线衍射仪(XRD)对碳酸钙晶型进行了表征。结果表明,当Ca2+浓度低于2.5 mmol/L时,磁处理抑制碳酸钙的结晶速度;当Ca2+浓度高于2.5 mmol/L时,磁处理促进了碳酸钙的结晶速度且抑制了晶粒的长大。随着磁场强度的增大,磁处理对碳酸钙结晶的影响更明显。The effect of magnetic field on the crystallization of CaCO3 was studied by monitoring the changes of conductivity of the treated water,and the crystallization of CaCO3 was characterized by SEM and XRD.The results show that when the concentration of Ca2＋ is less than 2.5 mmol/L,the magnetic field inhibits the rate of crystallization of CaCO3;when the concentration of Ca2＋ is higher than 2.5 mmol/L,the magnetic field accelerates the formation of crystallization of CaCO3 and inhibits the growth of particles.As the magnetic field strength increases,the effect of magnetic field on the rate of crystallization of CaCO3 is more evident.

关 键 词：磁场 碳酸钙 结晶 

分 类 号：TQ085[化学工程]