低铁赤泥混熔体系中镁铁尖晶石生长的研究  

Research on Magnesioferrite Growth in the Mixed Melting System of Low-Iron Red Mud

作　　者：黄菲[1] 王鑫宇 闻昕宇 常卓雅 HUANG Fei;WANG Xin-yu;WEN Xin-yu;CHANG Zhuo-ya(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2023年第6期849-855,862,共8页Journal of Northeastern University(Natural Science)

基　　金：国家重点研发计划项目(2018YFC1901903);沈阳市科技计划项目(20203512).

摘　　要：利用低铁赤泥构建SiO_(2)-Al_(2)O_(3)-CaO-MgO-Fe_(2)O_(3)多元混熔体系,采用高温物相重构法制备镁铁尖晶石型结晶釉.用X射线衍射､场发射扫描电镜等技术手段,观测不同的温度条件下镁铁尖晶石结晶生长行为.结果表明:烧成温度升高促进了镁铁尖晶石晶体生长,晶体呈自形-半自形的粒状结构.烧成温度为1270℃时,样品分别在酸､碱溶液中侵蚀96 h后,质量损失率小于0.1%,表现出最佳的耐酸碱性.制备的结晶釉磨损率为1.4×10^(-5)mm^(3)/(N􀅰m),维氏硬度为8.68 GPa,满足日用陶瓷釉的性能要求.The SiO_(2)-Al_(2)O_(3)-CaO-MgO-Fe_(2)O_(3)multi-mixed melting system was constructed using low-iron red mud,and the magnesioferrite crystalline glaze was prepared by a high-temperature phase reconstruction method.The crystal growth behavior of magnesioferrite at different temperatures was observed through X-ray diffraction and field emission scanning electron microscope.The results show that the increase of sintering temperature is helpful to the growth of magnesioferrite crystal,which has an autogenous-semi-autogenous granular structure.The sample has the best resistance against acid and alkali after 96 h with a mass-loss rate less than 0.1%under a sintering temperature of 1270℃.In addition,its wear rate is 1.4×10^(-5)mm^(3)/(N􀅰m),and its Vickers hardness is 8.68 GPa,which meets the performance requirements of daily ceramic glazes.

关 键 词：低铁赤泥 物相重构 镁铁尖晶石 晶体生长 

分 类 号：TQ174.4[化学工程—陶瓷工业]