Aluminum silicate ceramic fiberboard has developed rapidly and been widely used in many fields, which has brought a lot of help and convenience to our life and production. But at the same time, any kind of equipment will have some faults after a long time of use. This equipment is no exception. It sometimes has the phenomenon of steam erosion, which needs us to solve. Here is a detailed introduction to this phenomenon for you. I hope it can help you.
After etching aluminum silicate ceramic fiberboard in cryolite vapor for different times, it can be seen that the fiber surface of aluminum silicate fiberboard before erosion is smooth; A large number of whiskers were formed on the fiber surface after 25 hours of erosion. The composition of EDS analysis accorded with the mullite ratio. Combined with XRD, it was determined as mullite whiskers. It can be seen that after 50 hours of erosion, the whiskers continued to grow from the fiber surface and the length diameter ratio increased; After 75 hours of erosion, the internal structure of the fiber was destroyed and the surface was roughened. The fiber end has been covered with a large amount of mullite, indicating that the growth of mullite whisker leads to the damage of aluminum silicate ceramic fiber board. Different from the high-temperature damage mechanism of aluminum silicate ceramic fiberboard, cryolite vapor promotes the formation of mullite crystal nucleus. A large number of mullite whiskers grow around the fiber, resulting in the destruction of the fiber structure, eventually leading to the pulverization and spalling of the material and accelerating the damage of the material.
EDS analysis results of fibers after cryolite vapor erosion for different times. In addition to Al, Si and O elements, there are also f elements in the eroded fiber, and the contents of F and Na elements increase with the extension of erosion time. This further shows that cryolite vapor adheres to the surface of aluminum silicate ceramic fiberboard and reacts, resulting in mass increase. The above is the specific performance and analysis of aluminum silicate fiberboard after erosion at different times.
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Shandong redon high temperature materials Co., Ltd. has domestic high-end production equipment and reliable production technology, with an annual output of 1050 ceramic fiber series products, 1260 ceramic fiber series products, 1400 ceramic fiber series products and 1600 polycrystalline series products of more than 10000 tons. There are more than 30 kinds of products in different forms, such as cotton, blanket, felt, board, paper, various textiles, profiled products, modules, folding blocks, castables, spraying and so on, which can meet the heat insulation requirements of different situations in the high temperature field. Welcome to click the online service at the bottom right of the website or submit an online inquiry. We will contact you as soon as possible.
