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材料导报  2022, Vol. 36 Issue (19): 20120126-6    https://doi.org/10.11896/cldb.20120126
  无机非金属及其复合材料 |
烧结氧化镁粉的晶体特征对磷酸镁水泥力学性能的影响
孙赫男1,2, 关岩1,2, 毕万利1,2, 孙美硕2
1 辽宁科技大学材料与冶金学院,辽宁 鞍山 114051
2 辽宁科技大学科大峰驰镁建材研究院,辽宁 鞍山 114051
Effect of Crystal Characteristics of Calcined Magnesia Powder on Mechanical Properties of Magnesium Phosphate Cement
SUN Henan1,2, GUAN Yan1,2, BI Wanli1,2, SUN Meishuo2
1 School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China
2 Research Institute of Keda Fengchi Magnesium Building Materials, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China
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摘要 为分析磷酸镁水泥(MPC)力学性能与烧结氧化镁粉中MgO晶体特征间的相关性,本工作利用不同烧结条件下生产的氧化镁粉制备了MPC,分析了烧结氧化镁粉中MgO含量及其晶粒尺寸对MPC的凝结时间和抗压强度的影响,并利用X射线衍射仪(XRD)、综合热分析(TG-DSC)、扫描电子显微镜(SEM)和压汞法(MIP)等测试手段表征了利用不同烧结氧化镁粉制备的MPC体系在相同水化时间下的相组成、微观形貌和孔结构的变化。结果表明:MPC的凝结时间随着MgO平均晶粒尺寸的增大而延长;抗压强度随着MgO平均晶粒尺寸的增大而增大。其中,利用MgO含量为92.83%、晶粒平均尺寸为129.45 nm的烧结氧化镁制备的MPC凝结时间最长,力学性能最优,其初凝时间为22 min,1 d和28 d抗压强度分别可达35.8 MPa、77.6 MPa。此外,MgO平均晶粒尺寸较MgO含量对MPC力学性能的影响更大。
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孙赫男
关岩
毕万利
孙美硕
关键词:  磷酸镁水泥  烧结氧化镁粉  晶粒尺寸  抗压强度  相组成    
Abstract: To study the relativity between mechanical properties of magnesium phosphate cement (MPC) and the crystal characteristics of MgO in calcined magnesia powder, the MPC was prepared using calcined magnesia powder produced by different calcination conditions. The effect of content and crystalline size of MgO in calcined magnesia powder on the setting time and compressive strength of MPC was analyzed. Moreover, the variations of phase composition,microstructure and pore structure of MPC prepared using different calcined magnesia powder at the same hydration time were characterized by X-ray diffraction (XRD), thermo gravimetric-differential scanning calorimetry(TG-DSC), scanning electron microscope (SEM) and mercury intrusion porosimetry (MIP). The results show that the setting time and the compressive strength of MPC were increased with the average crystallite size of MgO. The MPC prepared by calcined magnesia powder with MgO content of 92.83% and average crystallite size of 129.45 nm has the longest setting time and the highest compressive strength. And its initial setting time is 22 min, 1 d and 28 d compressive strength can reach to 35.8 MPa and 77.6 MPa, respectively. In addition, the average crystalline size of MgO has a greater effect on the mechanical properties of MPC than MgO content.
Key words:  magnesium phosphate cement    calcined magnesia powder    crystalline size    compressive strength    phase composition
出版日期:  2022-10-10      发布日期:  2022-10-12
ZTFLH:  TQ172  
基金资助: 国家重点研发计划(2020YFC1909304);国家自然科学基金(51778101)
通讯作者:  15841293909@163.com   
作者简介:  孙赫男,2018年6月毕业于营口理工学院,获得工学学士学位;2021年3月毕业于辽宁科技大学,获得工学硕士学位。目前主要研究领域为镁质胶凝材料。
关岩,辽宁科技大学材料与冶金学院副教授、硕士研究生导师。1992年辽宁科技大学材料科学与工程专业本科毕业,2003年北京科技大学材料学硕士毕业后到辽宁科技大学工作至今,现任辽宁科技大学材料与冶金学院实验中心主任。目前主要从事路面快速修补材料的研发与应用、镁质胶凝材料微观结构与水化机理、低品位菱镁矿高值高效制备绿色镁建材技术等方面的研究工作。发表论文40余篇,包括Cement and Concrete Research、Materials、《建筑材料学报》《硅酸盐学报》等。
引用本文:    
孙赫男, 关岩, 毕万利, 孙美硕. 烧结氧化镁粉的晶体特征对磷酸镁水泥力学性能的影响[J]. 材料导报, 2022, 36(19): 20120126-6.
SUN Henan, GUAN Yan, BI Wanli, SUN Meishuo. Effect of Crystal Characteristics of Calcined Magnesia Powder on Mechanical Properties of Magnesium Phosphate Cement. Materials Reports, 2022, 36(19): 20120126-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20120126  或          http://www.mater-rep.com/CN/Y2022/V36/I19/20120126
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