Are ceramic fibers resistant to high temperatures?

In high-temperature industrial applications, the selection of insulation materials is crucial. One of the most frequently asked questions by customers when inquiring about ceramic fibers is: “How high a temperature can ceramic fiber withstand?”

Ceramic fiber products can withstand temperatures up to 1400℃ and above, meeting the high-temperature requirements of various industries such as steel, sklo, hutnictví, keramika, and petrochemicals.

Composition of ceramic fibers

Ceramic fiber is a lightweight refractory fiber material made primarily from high-purity alumina (Al₂O₃) and silicon dioxide (SiO₂) through high-temperature melting, blowing, or spinning processes. It is not only lightweight and has low thermal conductivity, but also possesses excellent thermal stability and thermal shock resistance, making it one of the ideal materials widely used for high-temperature insulation.

High temperature resistance of different types of ceramic fiber

Product Type	Main ingredients	Operating temperature（℃）	highest temperature（℃）
Standard ceramic fiber	Al₂O₃+SiO₂	1050	1260
High-purity ceramic fiber	High content Al₂O₃	1200	1350
High Alumina ceramic fiber	≥55% Al₂O₃	1300	1400
Zirconia ceramic fiber	含ZrO₂	1400	1430

Typical applications of ceramic fibers

• Insulation of industrial kiln linings: such as cement rotary kilns, glass melting furnaces, hot blast stoves, steel ladle covers, atd.;
• Insulation of high-temperature pipelines and equipment: reducing energy consumption and improving thermal efficiency;
• Heat treatment furnaces and heating furnaces: used for sealing furnace roofs and doors, and for insulation of furnace walls;