| CaO/MgO对花岗岩尾矿微晶玻璃物相和性能的影响 |
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| 引用本文： | 罗云龙,王辅,竹含真,廖其龙,徐国梁,刘来宝,张礼华.CaO/MgO对花岗岩尾矿微晶玻璃物相和性能的影响[J].硅酸盐通报,2021,40(12):4102-4108. |
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| 作者姓名： | 罗云龙 王辅 竹含真 廖其龙 徐国梁 刘来宝 张礼华 |
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| 作者单位： | 西南科技大学材料科学与工程学院,绵阳 621010 |
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| 基金项目： | 国家重点研发计划“固废资源化”重点专项(2019YFC1904900);国家自然科学基金(51702268,51808464);环境友好能源材料国家重点实验室自主课题(18fksy0212,20fksy09) |
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| 摘 要： | 以花岗岩尾矿为主要原料(掺入质量分数:56%),TiO2为主晶核剂,适量Na2SiF6为助熔剂和晶核剂,添加部分辅助原料,采用整体析晶法,制备了R2O-CaO-MgO-Al2O3-SiO2系花岗岩尾矿建筑微晶玻璃。研究了CaO/MgO质量比对微晶玻璃析晶能力、物相、微观结构及性能的影响。结果表明:CaO/MgO质量比的增加有利于增强基础玻璃的析晶能力,当CaO/MgO质量比≤0.88时,微晶玻璃的主晶相为钙长石和角闪石,当CaO/MgO质量比＞0.88时,主晶相转变为钙长石,且钙长石衍射峰的强度随着CaO/MgO质量比的增加而增大;随CaO/MgO质量比的增加,晶体数量逐渐增多,晶粒尺寸增大;微晶玻璃的体积密度和显微硬度随CaO/MgO质量比的增加呈先增大后减小的趋势,当CaO/MgO质量比为0.57时,体积密度达到最大值2.752 5 g/cm3,当CaO/MgO质量比为0.71时,显微硬度达到最大值为8.6 GPa。
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| 关 键 词： | 微晶玻璃 花岗岩尾矿 整体析晶法 CaO/MgO质量比 角闪石 钙长石 |
Effect of CaO/MgO Mass Ratio on Phases and Properties of Glass-Ceramics Prepared from Granite Tailings |
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| LUO Yunlong,WANG Fu,ZHU Hanzhen,LIAO Qilong,XU Guoliang,LIU Laibao,ZHANG Lihua.Effect of CaO/MgO Mass Ratio on Phases and Properties of Glass-Ceramics Prepared from Granite Tailings[J].Bulletin of the Chinese Ceramic Society,2021,40(12):4102-4108. |
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| Authors: | LUO Yunlong WANG Fu ZHU Hanzhen LIAO Qilong XU Guoliang LIU Laibao ZHANG Lihua |
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| Affiliation: | School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China |
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| Abstract: | The R2O-CaO-MgO-Al2O3-SiO2 building glass-ceramics have been synthesized by the method of monolithic crystallization. The granite tailings (mass fraction: 56%), TiO2, and Na2SiF6 were used as the main raw material, main nucleating agent, and flux and nucleating agent, respectively. The effect of CaO/MgO mass ratio on the crystallization capacity, crystal phase composition, microstructure and properties of glass-ceramics were investigated. The results show that the increase of CaO/MgO mass ratio is beneficial to the crystallization of parent glasses. When the CaO/MgO mass ratio is lower than 0.88, the main crystalline phases of glass-ceramics are anorthite and hornblende, otherwise, the main crystallize phase transforms into anorthite. Based on the results of XRD, the diffraction peak of anorthite become stronger with CaO/MgO mass ratio increasing. Besides, with the increase of CaO/MgO mass ratio, the number of crystals and grain size gradually increased, the volume density and microhardness increase first and then decrease. When the mass ratio of CaO/MgO is 0.57, the volume density has a maximum value of 2.752 5 g/cm3. Furthermore, the microhardness reaches the maximum value of 8.6 GPa as the CaO/MgO mass ratio is 0.71. |
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| Keywords: | glass-ceramics granite tailing method of monolithic crystallization CaO/MgO mass ratio hornblende anorthite |
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