In high-temperature industrial environments, the compressive strength of ceramic fiber insulation boards is a critical indicator for ensuring the structural stability of equipment. The relationship between temperature changes and their compressive performance has become an important research topic in material application and equipment design. Through systematic experiments and data analysis, the intrinsic connection between the compressive strength of ceramic fiber insulation boards and temperature changes can be clearly revealed.
At room temperature, ceramic fiber insulation boards exhibit excellent compressive performance due to their porous structure formed by interwoven fibers. Experimental data shows that the compressive strength of ordinary ceramic fiber insulation boards at 25°C can reach 0.5–1.0 MPa, while high-purity products can even reach 1.0–1.5 MPa. This strength is sufficient to support the self-weight and external pressure in conventional operating conditions such as furnace linings and pipe insulation layers, ensuring that the boards do not collapse or deform after installation. At this point, the physical entanglement of fibers and the action of a small amount of binder jointly form a stable compressive structure.
As the temperature rises to 400-600°C, the compressive strength of ceramic fiber insulation boards shows a slow upward trend. This is because the small amount of organic binder remaining inside the material at low temperatures gradually carbonizes, making the fibers more tightly bonded, while the rigidity of the fibers themselves is slightly enhanced. Test results indicate that within this temperature range, the compressive strength of ceramic fiber insulation boards can increase by 10%-20%, with high-purity products maintaining a compressive strength of 1.2-1.8 MPa. This characteristic enables them to maintain structural stability in medium-temperature heating equipment and adapt to pressure changes caused by temperature fluctuations.
When the temperature rises to 800-1000°C, the compressive strength of ceramic fiber insulation boards begins to gradually decrease. In high-temperature environments, the crystal structure of the fibers undergoes subtle changes, and the bonding strength between fibers weakens as the temperature increases. Experiments show that at 1000°C, the compressive strength of ordinary ceramic fiber insulation boards drops to 0.4-0.8 MPa, a decrease of approximately 20%-30% compared to room temperature; However, high-purity products with higher alumina content maintain compressive strength at 0.8–1.2 MPa, demonstrating superior high-temperature stability. During this stage, it is important to control external pressure to avoid exceeding the material’s compressive strength limit and causing structural damage.
Above 1200°C, the compressive strength of ceramic fiber insulation boards shows a significant decline. The compressive strength of standard-grade products may drop below 0.3 MPa, with the fiber structure prone to collapse due to high-temperature softening; in contrast, special high-temperature-resistant ceramic fiber insulation boards can maintain a compressive strength of over 0.5 MPa at 1400°C, meeting the basic structural requirements for ultra-high-temperature kilns.
Research indicates that the compressive strength of ceramic fiber insulation boards follows a pattern of “low-temperature stability, slight increase at medium temperatures, and decline at high temperatures.” Understanding this correlation provides a scientific basis for material selection and structural design under different temperature conditions, ensuring that ceramic fiber insulation boards effectively insulate while maintaining structural safety and stability in high-temperature environments.
