| Fe2O3对铜尾矿基CaO-MgO-Al2O3-SiO2微晶玻璃析晶行为的影响 |
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| 引用本文： | 施麟芸,徐玉华,魏琦.Fe2O3对铜尾矿基CaO-MgO-Al2O3-SiO2微晶玻璃析晶行为的影响[J].硅酸盐通报,2022,41(11):3844-3851. |
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| 作者姓名： | 施麟芸 徐玉华 魏琦 |
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| 作者单位： | 1.江西省建筑材料工业科学研究设计院,南昌 330001; 2.江西省节能建材与建筑结构工程研究中心,南昌 330001; 3.南昌大学材料科学与工程学院,南昌 330001 |
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| 基金项目： | 国家重点研发计划(2018YFC1903402) |
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| 摘 要： | 以铜尾矿为主要原料,通过熔融法制备CaO-MgO-Al2O3-SiO2(CMAS)微晶玻璃,并外掺Fe2O3晶核剂对细粒级铜尾矿基CMAS微晶玻璃析晶行为进行优化。利用DSC、XRD和SEM等手段研究了晶核剂用量对细粒级铜尾矿基CMAS微晶玻璃析晶行为和物理性能的影响,借助Ozawa-Chen法拟合计算了析晶动力学参数。结果表明,外掺Fe2O3晶核剂用量大于3.72%(质量分数)时,细粒级铜尾矿制备的微晶玻璃可以实现整体析晶。辉石相的析出是玻璃相中的Fe、Mg元素进入Si(Al)O4] 四面体晶格配位的结果,Fe3+的增加有利于辉石相的析出并降低了析晶活化能,外掺Fe2O3晶核剂能够较好地优化细粒级铜尾矿基微晶玻璃的析晶行为和力学性能。
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| 关 键 词： | 细粒级铜尾矿 微晶玻璃 Fe2O3 析晶行为 析晶动力学模拟 辉石相 |
| 收稿时间： | 2022-05-21 |
Effect of Fe2O3 on Crystallization Behavior of CaO-MgO-Al2O3-SiO2 Glass-Ceramics Based on Copper Tailings |
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| SHI Linyun,XU Yuhua,WEI Qi.Effect of Fe2O3 on Crystallization Behavior of CaO-MgO-Al2O3-SiO2 Glass-Ceramics Based on Copper Tailings[J].Bulletin of the Chinese Ceramic Society,2022,41(11):3844-3851. |
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| Authors: | SHI Linyun XU Yuhua WEI Qi |
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| Affiliation: | 1. Jiangxi Building Materials Industry Research and Design Institute, Nanchang 330001, China; 2. Jiangxi Energy-Saving Building Materials and Structural Engineering Research Center, Nanchang 330001, China; 3. School of Materials Science and Engineering, Nanchang University, Nanchang 330001, China |
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| Abstract: | CaO-MgO-Al2O3-SiO2 (CMAS) glass-ceramics were prepared by melting method using copper tailings as main raw material. The crystallization behavior of fine-grained copper tailings based CMAS glass-ceramics was optimized by adding Fe2O3 crystal nucleation agent. The effect of nucleation agent content on the crystallization behavior and physical properties of fine-grained copper tailings based CMAS glass-ceramics was studied by DSC, XRD and SEM, and the crystallization kinetics parameters were calculated by Ozawa-Chen method. The results show that when the amount of Fe2O3 crystal nucleation agent is more than 3.72%(mass fraction), the glass-ceramics prepared from fine-grained copper tailings can achieve overall crystallization. The precipitation of pyroxene phase is the result of coordination of Fe and Mg elements in glass phase into Si(Al)O4] tetrahedral lattice. In addition, the increase of Fe3+ is conducive to the precipitation of pyroxene phase and reduces crystallization activation energy. The crystallization behavior and mechanical properties of fine-grained copper tailings based glass-ceramics are optimized by Fe2O3 crystal nucleation agent. |
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| Keywords: | fine-grained copper tailing glass-ceramics Fe2O3 crystallization behavior crystallization kinetics simulation pyroxene phase |
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