东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (8): 1182-1185.DOI: -

• 论著 • 上一篇    下一篇

超声波对纳米碳酸钙合成过程的影响

于福家;王泽红;韩跃新;   

  1. 东北大学资源与土木工程学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    辽宁省教育厅优秀人才支持计划项目

Effect of ultrasonic on the preparation of nanometer calcium carbonate

Yu, Fu-Jia (1); Wang, Ze-Hong (1); Han, Yue-Xin (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Yu, F.-J.
  • About author:-
  • Supported by:
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摘要： 介绍了纳米碳酸钙的制备原理和方法.探讨了在超声波存在条件下,初始碳化温度、Ca(OH)2乳液浓度、CO2流量对合成反应过程的影响.研究结果表明,超声波具有强化纳米碳酸钙合成反应过程的作用,能够改善反应体系的传质、传热效果,大大提高溶液中钙离子的过饱和度,诱导碳酸钙迅速均匀成核;在超声波的作用下,碳化过程的最高初始温度可以提高5℃,从而能够缩短合成反应时间,提高合成效率.在试验研究的基础上,利用自制的超声合成反应器,在最佳工艺条件下,稳定地制备出了20~30 nm的纳米碳酸钙粉体;实现了利用超声波进一步细化、均匀化合成纳米碳酸钙产品的目的,使制备的纳米碳酸钙产品的质量更加优化.

关键词: 超声波, 纳米, 碳酸钙, 合成, 反应器

Abstract: The principle and method of nanometer calcium carbonate preparation are introduced. Under the ultrasonic condition, the effects of initial carbonizing temperature, density of Ca(OH)2 and flow rate of CO2 on nanometer calcium carbonate synthesis are investigated. The results show that the ultrasonic can strengthen the nanometer calcium carbonate preparation, improve the efficiency of mass and heat transfer, greatly enhance the supersaturation of calcium ions in the solution and induce rapid and uniform nucleations of the calcium carbonate. Moreover, the initial carbonizing temperature can be enhanced about 5°C because of ultrasonic, which can shorten the preparation time and improve the synthetic efficiency. On the basis of experimental investigation, the nanometer calcium carbonate powders with diameter of 20~30 nm were synthesized steadily under optimal process conditions in a homemade ultrasonic reactor. The results indicate that high-quality nanometer calcium carbonates with smaller and homogeneous size can be obtained by ultrasonic method.

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