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| 汉白玉废料制备球形纳米碳酸钙的研究 | |
| 引用本文： | 康明,廖其龙,尹光福,孙蓉. 汉白玉废料制备球形纳米碳酸钙的研究[J]. 材料导报, 2006, 20(Z1): 169-171 |
| 作者姓名： | 康明 廖其龙 尹光福 孙蓉 |
| 作者单位： | 1. 西南科技大学先进建筑材料四川省重点实验室,绵阳,621010;四川大学材料科学与工程学院,成都,610065 2. 西南科技大学先进建筑材料四川省重点实验室,绵阳,621010 3. 四川大学材料科学与工程学院,成都,610065 |
| 摘 要： | 将汉白玉废料通过高温煅烧分解得到氧化钙,再用氯化铵循环液溶解氧化钙制得碱性氯化钙溶液,除去其中的Mg、Fe等杂质得到氯化钙精制溶液,利用化学方法合成得到碳酸钙粉体.用X射线衍射(XRD)、扫描电镜(SEM)及激光粒度分析仪、白度仪对碳酸钙产品的晶相组成、形貌、粒度分布、白度及化学组成进行了分析,所得产品为纯度达98.5%以上、白度达97%以上、平均粒度为80nm左右的球形纳米级碳酸钙.并对碳化反应速率及合成球形纳米碳酸钙的影响因素进行了分析.实验中循环使用NH4Cl,氨的排放量小,减少了环境污染. |
| 关 键 词： | 汉白玉废料 球形纳米碳酸钙 氯化铵 循环 |
Study on the Fabrication of Global Nanometer Calcium Carbonate Using White Marble Scrap |
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| KANG Ming,LIAO Qilong,YIN Guangfu,SUN Rong. Study on the Fabrication of Global Nanometer Calcium Carbonate Using White Marble Scrap[J]. Materials Review, 2006, 20(Z1): 169-171 | |
| Authors: | KANG Ming LIAO Qilong YIN Guangfu SUN Rong |
| Abstract: | Alkaline CaCl_2 solution can be obtained through dissolving CaO with circular NH_4Cl solution,and CaO is gained by calcining white marble scrap under high temperature. After eliminating the Mg and Fe impurity in CaCl_2 solution, CaCO_3 power can be acquired with chemosynthesis method. Crystal constitute, crystal shape, granularity distributing, brightness and chemistry constitute of CaCO_3 power are analyzed with XRD, SEM, laser granule size instrument and brightness meter respectively. The results show that the purity of nanometer CaCO_3 power is above 98.5%, the Brightness is above 97% and the average diameter is about 80nm. The influencing factors of the speed of carbonization and composition of global nanometer CaCO_3 are studied. Because NH_4Cl solution is used circularly in present study, the environmental pollution is reduced rapidly. |
| Keywords: | white marble scrap global nanometer calcium carbonate NH_4Cl circular |
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