Why can tantalum carbide be used to prepare a thermal insulation fabric containing tantalum carbide?
Views : 122
Author : Lzh
Update time : 2023-02-06 16:27:19
What is tantalum carbide? Tantalum carbideis a black or dark brown metallic powder, cubic crystal system, hard, with a relative density of 13.9, a melting point of 3880 ℃, and a boiling point of 5500 ℃. It contains a mixture of 75% tantalum carbide and 25% hafnium carbide, with a melting point of more than 4200 ℃. Its chemical properties are extremely stable. It is insoluble in water, slightly soluble in sulfuric acid and hydrofluoric acid and soluble in the mixed solution of hydrofluoric acid and nitric acid. Tantalum pentachloride and methane are used as the reaction gas, argon is used as the carrier, and silicon carbide resistance is used to radiate and heat from the outside; Tantalum carbide or tantalum pentoxide is mixed with carbon black, formed by pressure powder, and heated in hydrogen or vacuum. It is used to manufacture cutting tools. Tantalum carbide (TaC) is a member of the ultra-high temperature ceramic family, with a high melting point (3880 ℃), high hardness (20 GPa), high elastic modulus (450 GPa), good electrical conductivity and thermal conductivity (25 ℃, 42.1 μΩ· cm-1,22W · m-1 · K-1). It has excellent physical and chemical properties, such as chemical corrosion resistance, high-temperature strength, good thermal shock resistance, etc. The densification and molding method of TaC is mainly powder sintering, and the powder's quality directly determines the material's performance.
Use of tantalum carbide A thermal insulation fabric containing tantalum carbide is prepared, including a canvas layer, a tantalum carbide layer, and a plush layer, characterized by the tantalum carbide of the tantalum carbide layer a strip structure, and the plush layer has many plush gaps. The positive effect of the invention is that the tantalum carbide of the tantalum carbide layer has good heat absorption and insulation effect. The heat is transferred to the human body through the multiple plush gaps of the plush layer to achieve the thermal insulation effect while reducing the weight of the traditional thermal insulation fabric; The invention has a simple structure, strong applicability, and easy popularization.
Preparation of tantalum carbide The chemical method is common for preparing TaC by the solid phase. Under certain conditions, T and C react directly to produce TaC. TaC is synthesized under vacuum at 1500 ℃. The carbonization mechanism of tantalum powder is studied. It is found that at the current carbonization temperature (1300 - 2100 ℃), the standard free enthalpy of Ta2C formation is much smaller than that of TaC (about 52-57kJ/mol), and the trend of Ta2C formation is very large at the initial stage of carbonization. Carbon atoms diffuse into the Ta2C gap through the TaC layer. The concentration of carbon atoms in the Ta2C lattice gradually increases, the TaC layer gradually advances towards the Ta2C core, and finally completely transforms into single-phase TaC particles.
Price of tantalum carbide Tantalum carbide particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of tantalum carbide. A large amount of large amount will be lower. The Price of tantalum carbide can be found on our company's official website.
Tantalum carbide supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including tantalum carbide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective tantalum carbide, you are welcome tocontact usor inquire at any time.
