Rigid carbon insulation also known as rigid felt is made of short rayon fibers and phenolic resin through a specialized manufacturing process. It provides exceptional thermal insulation at temperatures above 2000°C, making it ideal for rigorous high-temperature environments such as vacuum and inert gas furnaces, induction furnaces, and heat treatment processes.
The robust construction and superior material properties ensure reliable performance, making rigid felt a trusted choice for applications where durability and efficiency are paramount.
Rigid carbon insulation excels in maintaining thermal stability and efficiency in high-temperature environments, ensuring optimal performance in inert gas or vacuum furnaces.
The higher electrical resistivity compared to conventional methods significantly reduces induced currents, enhancing operational safety and efficiency.
With an exceptionally low impurity content of less than 500 ppm, and achievable purity levels as low as 20 ppm, rigid felt insulation products ensure minimal contamination in critical processes.
Available in various shapes including cylinders, discs, and plates, and can be tailored to meet specific dimensional requirements. This versatility allows for seamless integration into diverse industrial setups and makes them exceptionally well-suited for applications in high-temperature induction furnaces.
To further enhance performance, our rigid carbon insulation can be customized with a range of surface treatments, including special graphite coatings, graphite foil layers, and carbon cloth layers. These options provide additional protection and longevity in harsh conditions.
| Property | Unit | HP-115-T (Cylinder) | HP-117-B (Board, Disc) | HP-120-B (Board, Disc) |
|---|---|---|---|---|
| Bulk Density | g/cm3 | 0.15 + 0.01 | 0.17 + 0.02 | 0.2 + 0.02 |
| Electrical Resistivity (Parallel to Fiber Orientation) | μΩ·cm | ≥ 200000 | ≥ 110000 | ≥ 90000 |
| Carbon Content | % | > 99.9% | ||
| Moisture Absorption | % | ≤ 0.1% | ≤ 0.1% | ≤ 0.1% |
| Compressive Strength | MPa | 0.85 | 1.05 | 1.3 |
| Flexural Strength | MPa | 1.56 | 1.02 | 1.24 |
| Coefficient of Thermal Expansion >1000°C | 10^-6/°C | 2.6 ± 0.3 | 2.6 ± 0.3 | 2.6 ± 0.3 |
| Ash Content | ppm | Standard ≤ 500 ppm Purified ≤ 200 ppm Highly Purified ≤ 20 ppm | ||
| Processing | °C | ≥ 2200 | ||
| Size (maximum) | mm | D1000×H600×T100 | D1500×H1500×T300 | |