Why can amorphous boron powder be used as the initiator of airbag?
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Author : Ada
Update time : 2023-02-13 12:59:15
What is amorphous boron powder? Amorphous elemental boron is more active in chemical properties than crystalline elemental boron. Crystalline boron is very hard and often used to replace diamonds to make cutting tools or drill bits. A small amount of boron is added in the metal smelting process; on the one hand, it is used as a deoxidizer to prevent metal oxidation at high temperatures; On the other hand, it forms alloys and improves the properties of metals. Amorphous boron powder is an important energy material. As a solid fuel in the composite solid propellant, boron has a calorific value of more than twice that of carbon, about twice that of aluminium, and more than that of magnesium. Its volumetric calorific value is almost three times that of carbon-hydrogen fuel, and its density is slightly lower than that of aluminium. It has the highest volumetric calorific value. In terms of its energy, boron should be the best non-metallic fuel. And amorphous boron is irregular in shape; The large specific surface area greatly reduces the ignition temperature.
Use of amorphous boron powder Engine and smokeless clean propellant: the surface of boron powder particles is coated with various coating agents, the effect of various coating agents on the coated boron powder is studied by transmission electron microscope and acidometer, and the composition of combustion residue of the propellant containing coated boron is analyzed by chemical analysis method. The results show that a coating layer is formed on the surface of boron powder after the coating agent is coated; After coating, the pH value of the boron powder plus water suspension system is significantly increased, and it is suitable for the pharmaceutical process of boron-containing fuel-rich propellant; The combustion efficiency of coated boron powder is significantly improved.
Preparation of amorphous boron powder The preparation of boron powder mainly includes borane cracking method, hydrogen halide thermal reduction method, molten salt electrolysis method, metal-thermal reduction method, etc. The borane cracking method is to use sodium hydride and boron trifluoride ether complex to generate ethylborane through oxidation and reduction reaction, and then decompose the ethylborane at 300~900 ℃ to prepare amorphous boron. Although this method can produce amorphous boron powder with high purity, the ethylborane is gaseous and highly toxic at room temperature, making the production environment harsh, Moreover, the production cost is high and it is difficult to produce industrially. The thermal reduction method of boron halide hydrogen is to reduce refined bbr3 or bcl3 with pure hydrogen. Although the boron powder produced by this method has high purity, the production cost is high, the boron recovery rate is low and the corrosion protection requirements for environmental protection facilities and equipment are high, and the industrial production cannot be realized.
Price of amorphous boron powder Amorphous boron powder particle size and purity will affect the product's price, and the purchase volume can also affect the cost of amorphous boron powder. A large amount of large amount will be lower. The price of amorphous boron powder can be found on our company's official website.
Amorphous boron powder 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 amorphous boron powder, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective amorphous boron powder, you are welcome to contact us or inquireat any time.
