Overview
Asphalt-based solidified graphite felt is an advanced carbon material produced by carbonizing and graphitizing asphalt-impregnated fibrous precursors. The asphalt binder provides structural integrity while maintaining the material's porous, lightweight nature. This material combines the excellent thermal properties of graphite with the durability of a bonded structure. Developed for extreme temperature applications, it serves as a superior alternative to traditional ceramic fiber insulation in many industrial settings. The manufacturing process allows for precise control over density and thermal properties, making it adaptable to various technical requirements.
Physical and Chemical Properties
The material exhibits exceptional thermal stability, maintaining structural integrity in continuous service temperatures up to 3000°C in inert atmospheres. Its thermal conductivity ranges between 0.05-0.3 W/m·K depending on density and orientation, significantly lower than conventional graphite materials. Chemically, it demonstrates excellent resistance to most acids, alkalis, and organic solvents at room temperature. The material's porosity (typically 70-90%) contributes to its low density while providing effective insulation. Mechanical properties include good compressive strength (0.5-5 MPa) and flexibility, allowing for custom shaping and installation.
Main Applications
Primary applications include thermal insulation in high-temperature industrial furnaces, particularly in vacuum or inert gas environments. The aerospace industry utilizes it for re-entry vehicle insulation and rocket nozzle components due to its ablation resistance. In metallurgy, it serves as furnace linings and thermal breaks. Energy applications include insulation for nuclear reactors and high-temperature fuel cells. Emerging uses include thermal management in battery systems and as substrate material for high-temperature sensors.
Safety and Storage
While generally stable at room temperature, precautions should be taken when handling cut edges which may release fine particles. At temperatures above 400°C in oxidizing environments, gradual oxidation occurs with potential fume release requiring proper ventilation. Storage requires protection from moisture absorption which can affect subsequent high-temperature performance. Bulk material should be stored flat to prevent permanent deformation. Fire protection measures should follow standard carbon material protocols despite its non-flammable nature in bulk form.
B2B Procurement Guide
Key procurement considerations include specifying the required density range (typically 0.1-0.3 g/cm³), thermal conductivity values at operating temperatures, and dimensional tolerances. Suppliers should provide certified test data for thermal properties under relevant conditions. For large projects, request samples for performance verification. Lead times can vary significantly (2-8 weeks) depending on customization requirements. Quality indicators include uniform density distribution, absence of binder migration, and consistent fiber orientation. Consider total lifecycle costs as superior thermal performance may justify higher initial costs.
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