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

doi:10.3969/j.issn.1001-1935.2024.02.012

耐火材料 ›› 2024, Vol. 58 ›› Issue (2): 155-160.DOI: 10.3969/j.issn.1001-1935.2024.02.012

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

孙华云

山东工业职业学院山东淄博 256414

收稿日期:2023-09-25 出版日期:2024-04-15 发布日期:2024-04-24
作者简介:孙华云:女,1972年生,副教授。 E-mail:shy72@126.com

Light-weight mullite insulation materials prepared using low-grade kyanite for lithium battery kilns

Sun Huayun

First author's address: Shandong Vocational College of Industry,Zibo 256414,Shandong,China

Received:2023-09-25 Online:2024-04-15 Published:2024-04-24

摘要/Abstract

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-Al₂O₃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。

关键词: 低品位蓝晶石, 莫来石, 轻质隔热材料, 抗侵蚀性

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 resistance to lithium battery cathode materials and microstructure were studied.The results show that the introduction 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.

Key words: low-grade kyanite, mullite, light-weight insulation material, corrosion resistance

中图分类号:

TQ175

孙华云. 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[J]. 耐火材料, 2024, 58(2): 155-160.

Sun Huayun. Light-weight mullite insulation materials prepared using low-grade kyanite for lithium battery kilns[J]. Refractories, 2024, 58(2): 155-160.

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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

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