1700℃ Polycrystalline Mullite Alumina Fiber Board | Shijiazhuang Hongtao Technology

Shijiazhuang Hongtao Technology Co., Ltd., a professional high-tech enterprise based in Zhengding County, Shijiazhuang, Hebei, China, specializes in R&D, manufacturing and customization of 1800℃ polycrystalline mullite alumina fiber boards, core high-temperature insulation materials for industrial use.

Our 1800℃ polycrystalline mullite alumina fiber board is made of high-purity polycrystalline mullite (Al₂O₃·SiO₂) and alumina raw materials, produced via wet vacuum forming and high-temperature sintering technology.

It features excellent high-temperature resistance, with long-term working temperature up to 1700℃ and short-term maximum temperature of 1800℃, maintaining stable structure and performance in extreme heat environments.

With bulk density of 400-500kg/m³, linear shrinkage ≤0.5% (1700℃ for 8h), and thermal conductivity of 0.11-0.16W/(m·K) at 600℃, it is lightweight, rigid and easy to cut and install.

It has superior thermal shock resistance and chemical inertness, resisting acid, alkali and molten metal erosion, without contaminating processed materials. It also boasts good machinability and dimensional stability, meeting industrial insulation needs.

Widely applied in metallurgy, aerospace, semiconductor, new energy and other industries, it is ideal for kiln linings, high-temperature equipment insulation and precision component thermal protection. We support standard and customized sizes, committed to providing high-quality, durable solutions for global partners.