高长径比碳酸钙晶须的制备研究.pdf

河南化工

· 16· HENAN CHEMICAL INDUSTR 2005 年第 22 卷
高长径比碳酸钙晶须的制备研究
陈先勇1 ,唐琴1 ,瞿中华2 ,邵宇1
(1. 湖北民族学院化学与环境工程学院,湖北恩施 445000 ;2. 湖北建始环保局,湖北建始 445300)
摘要:采用间歇鼓泡碳化法制备碳酸钙晶须,考察了碳化反应温度、灰乳相对密度、添加剂用量、搅拌转速等因素
对碳酸钙粒子的最大晶须长度及长径比的影响。结果表明,在碳化反应温度为 70 ~ 80 C 、灰乳相对密度<1. 03、
搅拌转速为 200 ~ 400 r / min 及添加剂浓度(质量分数)为 0. 4% ~ 0. 6% 的条件下,可以合成出晶须长度为 50 ~ 80
!m、长径比为 40 ~ 50 的碳酸钙产品。
关键词:碳酸钙;高长径比;晶须;制备
中图分类号:To132. 32 文献标识码:A 文章编号:1003 - 3467(2005)05 - 0016 - 03
Synthesis of Calcium Carbonate Whiskers of High Aspect Ratios
CHEN Xian - yong1 ,TANG Oin1 ,OU Zhong - hua2 ,SHAO Yu1
(1. Department of Chemistry and EnviromentaI Engineering ,Hubei Institute for NationaIities ,Enshi
445000 ,China ;2. Hubei Jianshi EnvironmentaI Protection Bureau ,Jianshi 445300 ,China)
Abstract:CaIcium carbonate wiskers with high aspect ratios are synthesized by batch bubbIing carbonate
, ( ),
method. The infIuence of temperature concentration of Ca OH 2 dosage of additives and stirring time
on the size and morphoIogy of caIcium carbonate particIes are studied. The resuIt shows that,the caIcium
carbonate whiskers with high aspect ratio 40 ~ 50 and Iength 50 ~ 80 !m,can be prepared under the foI-
: , ( ) ,
Iowing reaction conditions temperature 70 ~ 80 C specific density of Ca OH 2 <1. 03 stirring speed
200 ~ 400 r / min and concentration of additives 0. 4% ~ 0. 6% .
Key words:caIcium carb