Ceramic fiber board

Ceramic Fiber Board: The Ideal Insulation Material for High-Temperature Industrial Applications

In high-temperature industrial sectors such as metallurgy, petrochemicals, ceramics, and glass, the selection of thermal insulation materials directly impacts equipment energy efficiency and service life. Ceramic fiber boards, as a new type of inorganic refractory material, have gradually become the core insulation material for high-temperature equipment due to their outstanding refractoriness, thermal insulation performance, and ease of processing. Their applications span multiple fields, ranging from civil construction to the aerospace industry, demonstrating strong technical adaptability and significant market potential.

Raw Materials and Processes: Scientific Formulation Delivers Outstanding Performance

Ceramic fiber boards are manufactured using inorganic raw materials such as calcined corundum and alumina powder. These materials are first melted at high temperatures and then processed via a jet-spinning technique to produce short fibers. The fibers are subsequently dispersed into a slurry using a pulping machine; after the addition of binders and fine-grade additives, the slurry is shaped by vacuum suction filtration, where it adheres to the mold surface. This process employs vacuum extraction to remove moisture, ensuring tight bonding among the fiber layers and forming a green body with initial strength. The green body is then dried for 10–24 hours and subjected to mechanical cutting to produce finished boards with smooth surfaces and precise dimensions.

Compared with traditional fiber blankets and vacuum-formed felts, ceramic fiber boards are manufactured using a wet vacuum-forming process, which improves fiber distribution uniformity by more than 30%. Their density is precisely controlled within the range of 260–320 kg/m³, with select high-density grades reaching 600–1,000 kg/m³. Combined with a compressive strength of 11 MPa, these boards can withstand frequent temperature fluctuations and mechanical vibrations. The integration of an intelligent control system during production enables real-time monitoring of slurry concentration and vacuum levels, boosting the product pass rate to over 98%.

Performance Analysis: Seven Key Advantages Underpin Broad Applications

1. Dual Breakthroughs in Fire Resistance and Thermal Insulation

Ceramic fiber boards are suitable for service temperatures ranging from 600°C to 1,400°C, with zirconia-containing grades capable of long-term operation at 1,350°C. Their thermal conductivity is as low as 0.18 W/(m·K), and their heat capacity at 1,000°C is only 0.2 kJ/(kg·K), resulting in energy savings of more than 40% compared with conventional refractory bricks. Field measurements conducted by a steelmaking enterprise show that replacing the traditional insulation layer with ceramic fiber boards reduces reheating furnace energy consumption by 22%, yielding annual savings of over 3,000 tonnes of standard coal.

2. Significant improvement in mechanical properties

Its non-brittle material properties confer a flexural strength of 1.5 MPa and impact resistance that exceeds that of comparable products by 30%. In nonferrous metal casting applications, ceramic fiber boards can withstand direct exposure to molten copper at 1,200°C without cracking, extending their service life to more than five years. A linear shrinkage rate of only 0.5% ensures dimensional stability under high-temperature conditions, thereby preventing structural deformation caused by thermal expansion.

3. A Revolution in Construction Convenience

Each panel weighs only 8–12 kg and can be cut and bent on-site. In a glass furnace retrofit project, construction workers used angle grinders to fabricate custom-shaped components, completing the installation of a 200 m² insulation layer within 48 hours—a 70% reduction in schedule compared with traditional masonry methods. Standardized dimensions (e.g., 600 × 400 × 20 mm) and a snap-fit installation design further lower the skill requirements for workers.

4. A New Benchmark for Environmental Protection and Safety

The product has achieved Class A non-combustibility certification, with a Fire Growth Rate Index (FIGRA) of ≤25 W/s and a Smoke Generation Rate Index (SMOGRA) of ≤50 m²/s². The manufacturing process employs microwave drying technology, which reduces energy consumption by 60% compared with conventional hot-air drying and cuts volatile organic compound (VOC) emissions by 90%. A case study from a chemical enterprise demonstrates that CO concentrations in the workshop have dropped to 0.8 ppm, meeting international occupational health standards.

Application Scenarios: Multi-Industry Solutions Provider

In the metallurgical sector, ceramic fiber boards used as the permanent lining in tundishes help maintain molten steel temperature within a ±3°C range, thereby enhancing the quality of continuous-cast billets. In the petrochemical industry, when this material is employed in high-temperature cracking furnaces, the furnace wall surface temperature drops from 320°C to 85°C, extending the equipment maintenance interval to 18 months. In the construction field, composite wall systems incorporating lightweight steel framing achieve a sound insulation rating of 52 dB, meeting the acoustic requirements of five-star hotels.

In the aerospace industry, a certain launch vehicle’s engine compartment employs ceramic fiber boards to construct a three-layer thermal insulation structure, reducing the operating temperature of the onboard electronic equipment by 120°C. In the new energy sector, when this material is used in lithium-battery drying ovens, temperature uniformity is improved to ±1.5°C, and battery consistency metrics are enhanced by 25%.

Future Outlook: Technological Iteration Driving Industrial Upgrading

With the introduction of 3D printing technology and nano-modification processes, ceramic fiber boards are advancing toward higher performance. A research institution has successfully developed a zirconia-reinforced composite board whose thermal conductivity at 1,400°C has been reduced to 0.12 W/(m·K), and whose thermal shock resistance has exceeded 1,000 cycles. The integration of an intelligent monitoring system endows the board with self-sensing temperature capabilities and crack-warning functionality, providing critical material support for Industry 4.0.

From traditional kilns to spacecraft, ceramic fiber boards are reshaping the high-temperature insulation materials landscape at an annual market growth rate of 15%. Their lightweight, modular, and intelligent characteristics not only drive continuous improvements in industrial energy efficiency but also offer innovative solutions for green manufacturing in support of carbon neutrality goals.