Rongsheng Refractory Company. In order to increase the use temperature of ceramic fiber blanket, adding zirconium oxide can effectively inhibit the crystallization and grain growth of aluminum silicate refractory fiber when used at high temperatures. The fiber’s ability to resist high-temperature shrinkage can be improved, and the use temperature of ceramic fiber blanket can be increased to 1400℃. Since the performance of zirconium-containing ceramic fiber blankets is significantly better than that of high-aluminum refractory ceramic fiber blankets and chromium-containing refractory ceramic fiber blankets, the production and application of zirconium-containing ceramic fiber blankets have developed rapidly. To purchase a high-quality zirconium-containing ceramic fiber blanket, free quote from the Rongsheng Refractory Material Manufacturer.

Production Process of Zirconium-Containing Ceramic Fiber Blanket

The production of zirconium-containing ceramic fiber blankets uses industrial alumina, high-quality quartzite (sand), and zircon as raw materials. It is melted at 2000 ~ 2200℃ in a resistance furnace and made by a blowing fiber forming process or a spinning fiber forming process. Zirconium-containing ceramic fiber blanket is a supercooled glass containing dispersed tetragonal zirconium oxide (t-ZrO2) microcrystals. t-ZrO2 is a decomposition product of zircon, with a melting point of up to 2690℃. Within the melting temperature range of zirconium-containing fiber production, it can only exist in a dispersed crystalline phase. During the melted fiber forming process, due to the rapid drop in temperature, almost no crystallization and phase change process occurs, and t-ZrO2 in a high-temperature state is retained. t-ZrO2 plays the following roles in improving the heat resistance of the fiber in zirconium-containing ceramic fiber blanket:

• 1) Due to the high melting point of t-ZrO2, it exists in the solid phase during the use of the fiber. Therefore, the presence of t-ZrO2 greatly increases the viscosity of the glass phase and the fracture energy of the fiber, thereby improving the structural strength and tensile strength of the fiber.
• 2) Inhibit crystallization and prevent crystal growth. When the glass phase of the refractory fiber crystallizes, the nucleus is first generated, and then the crystal grows. Since the t-ZrO2 microcrystals are evenly dispersed in the glass phase, they play a role in separating the nucleus and the grains. This makes it difficult and less likely for the nucleus and grains to contact each other, making it difficult for the nucleus and grains to merge with each other to form large-sized grains.
• 3) Reduce the thermal shrinkage of the fiber. During the use of the fiber, the fiber shrinks due to crystallization and grain growth. When zirconium-containing refractory fibers are used at high temperatures, tetragonal-monoclinic (m-ZrO2) crystal transformation may occur. When t-ZrO2- + m-ZrO2 transformation occurs, there is a 3% to 5% volume expansion, which can partially compensate for the shrinkage of the fiber. At the same time, the volume effect of the tetragonal-monoclinic crystal transformation causes the glass phase of the fiber to be subjected to tensile stress, which adds resistance to the crystallization and grain growth of the fiber, thereby effectively reducing the thermal shrinkage of the fiber.

Buy High-Quality Zirconium-Containing Ceramic Fiber Blankets

Rongsheng Refractory Material Manufacturer can provide high-quality insulation refractory materials and ceramic fiber products for high-temperature industrial furnaces. Among them, zirconium-containing ceramic fiber blanket products are the advanced version of Rongsheng ceramic fiber products. Rongsheng manufacturers can customize the size specifications and indicators of ceramic fiber products according to actual working conditions to meet the production conditions of high-temperature furnaces. The efficient thermal insulation performance of ceramic fiber products can save production costs for enterprises. To purchase high-quality ceramic fiber refractory fiber products, contact Rongsheng and get free samples and quotes.