自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 4    April 2018

[PDF Download]    [Flash Online]

    

Preparation and growth mechanism of plate-like basic magnesium carbonate by template-mediated/homogeneous precipitation method
CHEN Juan(陈娟), HUANG Zhi-liang(黄志良), CHEN Chang-lian(陈常连), LI Wen-zhao(李文昭), XU Wei-rong(徐伟荣)

School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430074, China

Abstract:In order to expand the application of the basic magnesium carbonate in the field of flame retardant, the plate-like basic magnesium carbonate (Mg5(CO3)4(OH)2.4H2O) was prepared successfully by template-mediated/ homogeneous precipitation method, using magnesium chloride hexahydrate (MgCl2.6H2O) and urea (CO(NH2)2) as reaction materials. Phase and morphology of the product were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and atomic force microscope (AFM), respectively. The results showed that well-crystallized plate-like Mg5(CO3)4(OH)2.4H2O can be prepared at the water bath temperature of 100 °C, water bath time of 24 h, the aging time of 5 h after adding organic template agent. The investigation on organic template mediated mechanism shows that the template affects the crystal morphology by changing surface energy of different crystal plane. Through a preliminary study on the growth mechanism of the product, it is found that the generation of the plate-like Mg5(CO3)4(OH)2.4H2O could be explained by two-dimensional nucleation/step growth mechanism.

 

Key words: plate-like; basic magnesium carbonate; template-mediated/homogeneous precipitation; two-dimensional nucleation; step growth

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号