以可溶性磷酸盐为控制剂制备碳酸钙晶须

金属矿山 ›› 2008, Vol. 38 ›› Issue (04): 56-59+63.

以可溶性磷酸盐为控制剂制备碳酸钙晶须

李丽匣，韩跃新，朱一民，王宇斌，陶世杰

东北大学

收稿日期:2007-02-20 出版日期:2008-04-15 发布日期:2011-07-20
基金资助:
辽宁省科技厅计划项目（编号：2006402036）。

Preparation of CaCO₃ Whiskers with Soluble Phosphate as Controller

Li Lixia，Han Yuexin，Zhu Yimin，Wang Yubin，Tao Shijie

Northeastern University

Received:2007-02-20 Online:2008-04-15 Published:2011-07-20

摘要/Abstract

摘要： 采用气液碳化法，以可溶性磷酸盐为控制剂，在普通重力场中一步法制备出结晶程度良好、文石相含量高的碳酸钙晶须。研究了可溶性磷酸盐添加量、碳化反应温度、CO₂充气速度、料浆Ca(OH)₂初始质量分数对产品的影响，分析了制备过程中不同阶段产物的XRD图谱，结果表明：作为文石相碳酸钙晶须结晶中心的是Ca₅(PO₄)₃(OH)而非Ca(HPO₄)·2H₂O或Ca₃(PO₄₎₂，适宜碳酸钙晶须生长的条件为n(Ca/P)=1: 0.25、碳化反应温度75 ℃，CO₂通气速度16.2~ 32.4 L/(h·kg)、Ca(OH)₂初始质量分数1.5%~5.6 %。

关键词: 可溶性磷酸盐, 碳酸钙晶须, 制备

Abstract: Well crystallized aragonite CaCO₃ whiskers of high aragonite phase content were prepared by one-step method with soluble phosphate as controller from Ca(OH)₂ suspension in common gravitational environment.Meanwhile, the effects of controller dosage, reaction temperature, CO₂flow rate, and initial Ca(OH)₂ concentration on the product were investigated and analyzed.XRD spectra has revealed that it is Ca₅(PO₄)₃(OH) rather than Ca(HPO₄)·2H₂O or Ca₃(PO₄₎₂ that is served as crystal nucleus leading to the formation of aragonite-type CaCO₃ whiskers. The conditions favorable to the growth of carbonate whiskers include n(Ca/P)=1∶0.25,a carbonization reaction temperature of 75 ℃,CO₂flow rate of 16.2~32.4 L/(h·kg) and an initial Ca(OH)₂ concentration of 1.5 wt.%~5.6 wt.%.

Key words: Soluble phosphate, Calcium carbonate whiskers, Preparation

李丽匣, 韩跃新, 朱一民, 王宇斌, 陶世杰. 以可溶性磷酸盐为控制剂制备碳酸钙晶须[J]. 金属矿山, 2008, 38(04): 56-59+63.

LI Li-Xia, HAN Yue-Xin, ZHU Yi-Min, WANG Yu-Bin, TAO Shi-Jie. Preparation of CaCO₃ Whiskers with Soluble Phosphate as Controller[J]. Metal Mine, 2008, 38(04): 56-59+63.

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