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Properties and Application of Amorphous Boron Powder

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Amorphous boron powder overview

Elemental boron is a black or dark brown powder. When oxidized in air, the internal boron can be prevented from being oxidized due to the formation of a boron trioxide film. It can react with fluorine at room temperature and is not affected by hydrochloric acid and hydrofluoric acid aqueous solution. Corrosion. Boron is insoluble in water, and boron powder is soluble in boiling nitric and sulfuric acids, and most molten metals such as copper, iron, manganese, aluminum, and calcium. The content of boron in the earth's crust is 0.001%. Boron is black or black. Silver grey solid. Crystal boron is black, its hardness is second only to diamond, and its texture is brittle. Boron is called Boron, its name comes from Arabic, the original meaning is "flux". It means that the ancient Arabs already knew that borax has the ability to melt metal oxides and is used as a flux in soldering. The volume heat of boron is the largest, and its weight is second only to beryllium. Slightly soluble in nitric acid, insoluble in water. Amorphous boron is chemically active. Powder and air can form explosive mixtures. Amorphous boron is prepared by reducing boric anhydride with magnesium.


Amorphous boron powder MF: B; Molecular weight: 10.81; Melting point: 2300℃±2℃; Sublimation temperature: 2550℃; Relative density: 2.34-2.37; Solubility: Insoluble in water, hydrochloric acid, ethanol and ether, easy to cool. The solution is decomposed into hydrogen by concentrated sulfuric acid and nitric acid, and oxidized into boric acid.

The quality of amorphous boron powder is stable and reliable. This product can be stored for a long time. According to user requirements, products of different granularities can be customized.

The chemical properties of amorphous boron are more reactive than crystalline boron. Crystalline boron is very hard and is often used instead of diamond to make cutting tools or drill bits. Adding a small amount of boron in the process of metal smelting, on the one hand, acts as a deoxidizer to prevent the metal from being oxidized at high temperatures; on the other hand, it forms an alloy to improve the performance of the metal.

Amorphous boron powder is an important energy material. It is used as solid fuel in composite solid propellants. The calorific value of boron is more than twice that of carbon, about twice that of aluminum, and more than twice that of magnesium. This value is almost three times that of hydrocarbon fuels, which are only slightly less dense than aluminum and have the highest volumetric calorific value. In terms of its energy, boron should be the best non-metallic fuel. Amorphous boron greatly reduces the ignition temperature due to its irregular shape and large specific surface area.

Amorphous boron powder application

Amorphous boron powder is widely used in metallurgy, electronics, medicine, ceramics, nuclear industry, chemical industry and other fields.

As a boron fine chemical product, amorphous boron powder is widely used in metallurgy, synthesis, aerospace and other fields. It is also commonly used as a deoxidizer, an initiator for automobile airbags, an igniter for rocket launch fuel, etc.

Because crystalline boron is very hard, it is often used instead of diamond to make cutting tools or drill bits. In the process of metal smelting, a small amount of boron is added as a deoxidizer to prevent the metal from being oxidized at high temperature; on the other hand, the mechanical properties of the metal can be improved.

Amorphous boron powder will become an important energy material, and its application in composite solid propellants has long been concerned. As a solid fuel, the calorific value of boron is more than twice that of carbon, about twice that of aluminum, and more than twice that of magnesium. Its volumetric calorific value is almost three times that of hydrocarbon fuels, and its density is only slightly lower than that of aluminum. It has the highest volume calorific value. In terms of its energy, boron should be the best non-metallic fuel.

Amorphous boron powder price

The price of amorphous boron powder varies randomly with factors such as production cost, transportation cost, international situation, exchange rate, and the supply and demand relationship of the amorphous boron powder market. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for amorphous boron powder material, please feel free to contact for the latest amorphous boron powder price.

Amorphous Boron Powder Supplier

As a global supplier of amorphous boron powders, Tanki New Materials Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services

Amorphous Boron Powder Properties
Other NamesBoron Powder, amorphous boron
CAS No.7440-42-8
Compound FormulaB
Molecular Weight10.811
AppearanceDark Brown
Melting Point2079 °C
Boiling Point2550 °C
Density2.34 g/cm3
Solubility in H2ON/A
Electrical Resistivity1.8 x 1012 microhm-cm @ 0 °C
Poisson's RatioN/A
Specific Heat0.245 Cal/g/K @ 25 °C
Thermal Conductivity0.274 W/cm/K @ 298.2 K
Thermal Expansion5–7 µm·m-1·K-1 @ 25 °C
Young's ModulusN/A
Amorphous Boron Powder Health & Safety Information
Signal WordWarning
Hazard StatementsH228-H302+H332-H335
Flash PointNot applicable
Hazard CodesN/A
Risk CodesN/A
Safety StatementsN/A
RTECS NumberED7350000
Transport InformationDOT
WGK GermanyNWG

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