Journal
MATERIALS
Volume 15, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/ma15103675
Keywords
B2O3; Al2O3; liquid phase; mechanical properties; ceramizable silicone rubber composites
Categories
Funding
- Key-Area Research and Development Program of Guangdong Province [2021B0707050001]
- Chaozhou Science and Technology Project [2019PT01]
- Self-innovation Research Funding Project of Hanjiang Laboratory [HJL202012A001]
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The liquid-phase amount has a significant effect on the mechanical properties of ceramizable silicone rubber composites. Controlling the liquid-phase amount can enhance the strength and load-bearing performance of residual products.
The reliable mechanical properties of ceramizable silicone rubber composites during pyrolysis are necessary for their application in the fire-resistant fields. The effects of liquid-phase amount on the mechanical properties of silicone rubber composites are investigated. The results show a positive correlation between the liquid-phase amount and the flexural strength of the residual products pyrolysis below 800 degrees C. The nano-gamma-Al2O3 in the fillers reacts with liquid B2O3 to form aluminum borate above 800 degrees C, which consumes the liquid phase and strengthens the residual products to a certain extent. Increasing the B2O3 addition and introducing nano-gamma-Al2O3 can control the liquid-phase amount in the range of 15% to 30%, which makes the composites have better residual strength and support performance. The residual strength of composites pyrolysis at 500 degrees C to 1000 degrees C is higher than 2.50 MPa, and the maximum is up to 18.7 MPa at 1000 degrees C.
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