文献类型：期刊文献

中文题名：电子级碳酸钙的合成及机理

英文题名：Synthesis and Mechanism of Electronic Calcium Carbonate

作者：侯亚雯[1];陈雪梅[1]

机构：[1]华东理工大学化工学院超细粉末国家工程研究中心

年份：2019

卷号：45

期号：5

起止页码：728

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

语种：中文

中文关键词：复分解;碳酸钙;粒径;合成;添加剂

外文关键词：double decomposition;calcium carbonate;particle size;synthesis;additive

摘要：采用复分解方法制备电子级碳酸钙,用扫描电子显微镜(SEM)、X射线衍射(XRD)等分析手段表征了碳酸钙颗粒的形貌和结构,探讨了复分解反应温度、酒石酸添加剂加入量等关键工艺条件对碳酸钙形貌的影响。结果表明:在复分解温度为30℃,酒石酸质量分数为1.0%,精制后的氯化钙、碳酸氢铵及氨水按照物质的量之比为1∶1∶1进行复分解反应时,可制备出粒径为2.5μm左右、粒径分布均匀、纯度为99.86%、晶型为方解石的近球形碳酸钙;添加剂酒石酸的主要作用是与钙离子形成酒石酸钙,酒石酸钙的络合作用和空间结构促进碳酸钙的成核,并抑制其生长。
With the breakthrough of electronic information industry,new requirements were proposed for the development of electronic information materials.As one of the raw materials of electronic components,calcium carbonate (CaCO3) has the characteristics of reducing the dependence of the dielectric constant on the temperature, changing the Curie temperature,improving the resistance to voltage and ferroelectric properties.CaCO3 with high purity,small particle size,uniform particle size distribution and calcite crystal type present excellent characteristics,and its preparation technology has attracted much attention.In this paper,electronic CaCO3 was prepared by decomposition reaction.The morphology and structure of CaCO3 were analyzed by scanning electron microscope,X-ray diffraction etc.Moreover,the effects of the key parameters,such as temperature and additive amount on the morphology of CaCO3,were discussed.The results showed that the nearly spherical CaCO3 with a particle size of 2.5 μm,uniform distribution particle size and purity of 99.86% was obtained when the decomposition reaction temperature was 30 ℃, the addition mass fraction of tartaric acid was 1.0% and the mole ratio of refined calcium chloride,ammonium bicarbonate and ammonia water was 1∶1∶1.The aim of addition of tartaric acid is to form calcium tartrate with calcium ion.The complexation and spatial structure of calcium tartrate promote the nucleation of calcium carbonate and inhibit its growth.