Refractory fibers, also known as ceramic fibers, are a new type of fibrous high-temperature resistant material. However, many mineral dust fibers can have strong biochemical interactions with intracellular cells, which is not only harmful to human health but also poses certain environmental hazards.
In recent years, people have paid attention to the development of new types of fibers, and mineral fiber components such as CaO, MgO, BZO3, Zr02 have been introduced. According to experimental evidence, alkaline earth silicate fibers mainly composed of CaO, MgO, and Site02 are soluble fibers. Biosoluble refractory fibers are mineral fiber materials that have certain solubility in human body fluids, reduce damage to human health, and can be continuously used at higher temperatures. In order to improve the heat resistance of soluble fibers, the method of introducing Zr02 component was adopted to achieve an improvement in the heat resistance of soluble fibers.
In the process of exploring bio soluble ceramic fibers, many countries have their own patents in the composition of soluble ceramic fibers. Combining various patents from the United States and Germany on soluble ceramic fiber composites, characterized by the following composition (in weight percentage):
1. SiO2 45-65% Mg0 0-20% Ca0 15-40% K2O+Na2O 0-6%
2. SiO2 30-40% A1203 16-25% Mg0 0-15% KZO+NazO 0-5% P205 0-0.8%
From the composition of various soluble fibers in patents and the market, it is known that the current soluble refractory fiber is a new type of refractory fiber, and its main components differ greatly from traditional fibers. Its main components are in the magnesium calcium silicon system, magnesium silicon system, and calcium aluminum silicon system.
The research on biodegradable materials mainly focuses on two hot topics:
1. Research on the biocompatibility and biological activity of biodegradable materials;
2. Research on the degradation mechanism and metabolic process of biodegradable materials in vivo.
Soluble ceramic fibers can replace some traditional ceramic fibers. The continuous use temperature of soluble ceramic fibers can reach 1260 ℃, and they also have excellent thermal insulation performance and a wide range of safe usage temperatures. If inhaled into the lungs, it can quickly dissolve in lung fluid and is easily excreted from the lungs, indicating its low biological persistence.
Soluble ceramic fibers have been made into many shaped products and applied in many high-temperature fields. Vacuum forming can process the fiber into various refractory shapes, including tubes, rings, composite shaped combustion chambers, etc. To optimize the performance of the ceramic fiber in use, ceramic fiber products can be cut or not cut for use. Soluble ceramic fiber felt and fiber blocks have been used in many high-temperature fields, including ceramic kilns, iron making furnaces, and aluminum smelting furnaces. They can also be used in ethylene furnaces in the petrochemical industry, with the same good performance as traditional ceramic fibers