Black SiC Micropowder is the most mainstream infrared shielding abrasive / inorganic filler for aerogel thermal insulation sheets of power battery packs at present.
Why choose black silicon carbide?
Infrared absorption / shielding performance: Black SiC contains a small amount of free carbon. It strongly absorbs and scatters mid-infrared radiation (2.5~7μm) generated during cell thermal runaway, greatly reducing radiative heat conduction of aerogel at high temperature and restraining thermal runaway propagation.
High temperature resistance: Black silicon carbide has a melting point of 2730℃.
It maintains dimensional stability at 1000–1600℃ without melting or decomposition, preserves the skeleton strength of aerogel and prevents collapse of insulation sheets under high temperature.
Cost advantage: black silicon carbide has lower smelting cost and is suitable for mass production of power batteries.
Chemical stability: Resistant to electrolyte corrosion; no toxic flue gas released at high temperature.
Most commonly used grades for infrared shielding of new energy vehicle aerogel thermal insulation sheets: 3-5μm
2000#, 3000#, 4000#, P3000, P4000, P5000
Black silicon carbide chemical composition
| SiC | Fe2O3 | F.C | F.Si | SiO2 | LOI | |
| ≥98.5 | ≤0.10 | ≤0.20 | ≤0.20 | ≤0.50 | < 0.05 |
