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- Title
Light-weight mullite insulation materials prepared using low-grade kyanite for lithium battery kilns.
- Authors
Sun Hua-yun
- 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 °C 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 °C 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 °C have good corrosion resistance to lithium battery cathode materials.
- Subjects
INSULATING materials; LITHIUM cells; CYANITE; MULLITE; THERMAL conductivity; POLYMER clay; ELECTRIC batteries; HARDWOODS
- Publication
Refractories / Naihuo Cailiao, 2024, Vol 58, Issue 2, p155
- ISSN
1001-1935
- Publication type
Article
- DOI
10.3969/j.issn.1001-1935.2024.02.012