Non-swelling type chemical corrosion-resistant boron carbide nozzle

Abstract

The invention discloses a non-swelling type chemical corrosion-resistant boron carbide nozzle, which comprises the following materials in parts by weight: 400-450 parts of boron carbide, 20-25 parts of copper powder, 20-25 parts of zirconia, 2-5 parts of beryllium carbide, 2-5 parts of zirconium boride, 25-35 parts of lanthana, 7-9 parts of zrconium mullite powder, 5-8 parts of obsidian, 4-7 parts of illite, 0.3-0.5 part of sodium hyposulfite, 0.2-0.4 part of zine stearate, 2-3 parts of polypropylene oxide glycol, 2-3 parts of dchloroacetic acid resin, 2-3 parts of glass fibers, 0.5-1 part of dibutyltin dilaurate, 0.1-0.2 part of ephedrine, 3-5 parts of polyoxyethylene methyl glucoside ether, 4-7 parts of methyl methacrylate, 2.4-2.7 parts of mineral fibers, 3-4 parts of polyester fibers, and 0.5-1.1 parts of titanium carbide fibers. The non-swelling type chemical corrosion-resistant boron carbide nozzle is good in chemical corrosion resistance and is still good in stability even in a sulfuric acid solution at 80 DEG C. Meanwhile, the raw materials of the non-swelling type chemical corrosion-resistant boron carbide nozzle are reasonably compounded and are free of any halogen that easily causes the polymer swelling phenomenon. Therefore, the non-swelling type chemical corrosion-resistant boron carbide nozzle can be widely used as an output nozzle for chemical products.

Description

technical field [0001] The invention relates to the technical field of boron carbide element preparation, in particular to a non-swelling and chemical corrosion-resistant boron carbide nozzle. Background technique [0002] The outstanding advantages of boron carbide are low density, high hardness and large neutron absorption cross-section, and it is mainly used in the form of boron carbide ceramic materials. Boron carbide has a low self-diffusion coefficient due to strong covalent bonding and is difficult to sinter. Densification is usually achieved by hot pressing or hot isostatic pressing sintering. However, on the one hand, hot pressing and hot isostatic pressing can only produce products with relatively small sizes and simple shapes, and on the other hand, the manufacturing costs of hot pressing and hot isostatic pressing are high, which hinders the application of boron carbide materials. [0003] Since ceramic nozzles were introduced into China in the 1990s, the mater...

AI Technical Summary

Problems solved by technology

[0004] It is believed that one of the reasons hindering the densification of boron carbide ceramics is the boron oxide on the surface of boron carbide powder. The presence of boron oxide will cause the particle coarsening of boron carbide at a lower temperature, resulting in a decrease in the driving force for densification at high temperature.