Insulation Felt

Semicorex high-quality Insulation Felt is specifically engineered for use in long crystal growth thermal barrels, providing superior thermal management to optimize crystal growth processes. Designed with advanced material technology, this felt ensures consistent temperature control, reduces heat loss, and enhances the overall efficiency and quality of crystal production.

Insulation Felt is generally made of viscose fiber, PAN fiber and other raw fibers through non-woven process to make felt, and then through impregnation (mainly viscose base needs to be impregnated), pre-oxidation, carbonization, graphitization, cutting, and finally the finished product is obtained.

From the main performance indicators, the density of Insulation Felt is only about 0.10g/cm³, which is about one-tenth of the density of water. The fiber itself is light and thin after graphitization, and the small space formed between a large number of fibers makes the density of soft felt so low. The thermal conductivity of high-purity/high-efficiency viscose-based graphite soft felt is about 0.10-0.15W/m·k at 1150℃. The lower the thermal conductivity, the better the thermal insulation performance.

The Insulation Felt can be used in an environment greater than 2200 degrees Celsius. While taking into account the thermal insulation performance, the internal ash content can also be stably controlled below 20ppm, which can effectively control the problem of impurity pollution. And it has excellent antioxidant and Si corrosion resistance. As a high-end thermal barrier material, it has obvious advantages in applications in semiconductor thermal field environments such as Si crystal growth furnaces and SiC crystal growth furnaces.