低品位蓝晶石制备锂离子电池窑炉用莫来石轻质隔热材料
Light-weight mullite insulation materials prepared using low-grade kyanite for lithium battery kilns
孙华云1
作者信息
- 1. 山东工业职业学院 山东淄博 256414
- 折叠
摘要
为实现对低品位蓝晶石的综合利用,以低品位蓝晶石、α-A12O3微粉和黏土为主要原料,在10 MPa下机压成型,分别经1 450和1 500℃保温3 h热处理,通过燃尽物法制备了莫来石轻质隔热材料.研究了黏土加入量(加入质量分数分别为5％、10％、15％、20％)和热处理温度(1 450、1 500 ℃)对试样体积密度、显气孔率、常温耐压强度、热导率以及抗锂离子电池正极材料侵蚀性能和显微结构的影响.结果表明:黏土的引入促进了试样的致密化和莫来石化反应,提高了试样体积密度、热导率和强度,添加20％(w)黏土的试样经1 450 ℃烧后物理性能最佳,其体积密度为0.88 g·cm-3,常温耐压强度为21.0 MPa,热导率为0.25 W·(m·K)-1;当热处理温度为1 450 ℃,黏土加入量为10％(w)时,试样具有较好的抗锂离子电池正极材料侵蚀性能.
Abstract
In order to realize the comprehensive utilization of low-grade kyanite,light-weight mullite insulation materials were prepared by burnout method with low-grade kyanite,α-Al2O3 micropowder and clay as main raw materials,machine-pressing under 10 MPa,and hot treating at 1 450 or 1 500 ℃ for 3 h.Effects of the clay addition(5％,10％,15％and 20％,by mass)and hot treatment temperature on the bulk density,apparent porosity,cold crushing strength,thermal conductivity of samples,as well as the corrosion resist-ance to lithium battery cathode materials and microstructure were studied.The results show that the intro-duction of clay promotes the densification and mullitization reaction of the samples,and enhances the bulk density,thermal conductivity,and strength of the samples;the samples with 20％clay hot treated at 1 450 ℃ perform the best physical properties:bulk density 0.88 g·cm-3,cold crushing strength 21.0 MPa,thermal conductivity 0.25 W·(m·K)-1.The samples with 10％clay hot treated at 1 450 ℃ have good corrosion resistance to lithium battery cathode materials.
关键词
低品位蓝晶石/莫来石/轻质隔热材料/抗侵蚀性Key words
low-grade kyanite/mullite/light-weight insulation material/corrosion resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据