人工晶体学报2025，Vol.54Issue(5)：898-908,11.DOI:10.16553/j.cnki.issn1000-985x.2024.0293
白云石精制液可控制备高长径比碳酸钙晶须的研究
Controlled Preparation of High Aspect Ratio Calcium Carbonate Whiskers from Dolomite Refined Solution
摘要
Abstract
Aragonite calcium carbonate whiskers with a high aspect ratio were prepared by carbonization method using high concentration dolomite refined solution as the raw material.The calcium carbonate whisker samples were characterized by XRD,SEM,TEM,etc.The effects of carbonization temperature,stirring rate,CO2 aeration rate,and aging time on the dispersion degree and aspect ratio of calcium carbonate whiskers were investigated.The results show that the optimum process conditions for the preparing calcium carbonate whiskers are as follows:carbonization temperature 80℃,CO2 aeration rate 25 mL/min,stirring rate 200 r/min,and aging time 1 h.Under these conditions,calcium carbonate with a yield of 95%,whisker aspect ratio of 30～35,whisker content of 99.7%,whiteness of 99.9%,and uniform distribution can be obtained.The growth mechanism of calcium carbonate was analyzed.The results show that Mg2+can inhibit the growth of calcite calcium carbonate and promote the growth of aragonite calcium carbonate during the carbonization process,and calcium carbonate whiskers have a preferential growth along(120)crystal plane.关键词
白云石/碳酸钙晶须/碳化法/高长径比/晶体生长Key words
dolomite/calcium carbonate whisker/carbonization method/high aspect ratio/crystal growth引用本文复制引用
于丰,郑强,齐婷玉,张郁柏,马亚丽,贾松岩,李雪..白云石精制液可控制备高长径比碳酸钙晶须的研究[J].人工晶体学报,2025,54(5):898-908,11.基金项目
辽宁省教育厅青年研究项目(JYTQN2023368) （JYTQN2023368）
辽宁辽河实验室开放创新基金项目(LLL24KF-02-01) （LLL24KF-02-01）
辽宁省菱镁矿高值利用工程研究中心开放课题(LMKK20240102) （LMKK20240102）
