Ceramic fiber module is a kind of fibrous lightweight refractory material. Due to its advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and mechanical vibration resistance, it is widely used in machinery, metallurgy, chemical industry, petroleum, etc. , ceramics, glass electronics and other industries.
The most important indicators of ceramic fibers are fiber diameter and thermal stability. Al2O3SiO2 fibers are commonly used in the ceramic industry, and are divided into different application ranges according to the content of Al2O3. Cr2O3 materials are also introduced into them to improve their refractory and anti-oxidation properties. Generally, fiber products with high alumina content and low content of iron oxide and other impurities are pure white, and the fibers introduced with chromium oxide are colored with a creamy yellow tone.
The diameter of ceramic fiber is generally 2~5pm, the length is mostly 30~250mm, and the fiber surface is smooth and cylindrical. Those with fine fibers, low density, and low specific heat use high temperature. If the fiber is thick and the density is high, the effect is not ideal.
The thermal stability index of ceramic fiber is more important. The linear shrinkage range of various products of Al2O3-SiO2 fiber at 1260℃ is between 35-88%. The amount of shrinkage also directly affects thermal stability.
Due to the low thermal conductivity, low density and light weight of fibers, lighter steel frame support structures are used in the design and construction of kilns, so that the development of ceramic kilns has entered the era of "lightweight kilns". The fiber has small heat storage and is suitable for rapid heating and cooling firing methods.
Ceramic fibers are flexible and can be processed into products with grooves or openings, and have good resistance to mechanical vibration and impact, and good chemical stability. These advantages are the development of new kilns and spread to ceramic technology and industries. development has played an important role in promoting.
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