Preparation and application of aluminum boride

Overview of aluminum boride AlB2 powder

Aluminum boride (AlB2) is a binary compound formed by aluminum and boron. It is a red solid under normal temperature and pressure. The surface gloss will be lost when heated. It is stable in cold dilute acid and decomposes in hot hydrochloric acid and nitric acid. It is obtained by mixing fine powders of aluminum and boron and heating them.

It is one of two compounds of aluminum and boron, the other is AlB12, commonly known as aluminum boride. AlB12 is a black shiny monoclinic crystal with a specific gravity of 2.55 (18°C). Insoluble in water, acid and alkali. It decomposes in hot nitric acid and is obtained by melting together boron trioxide, sulfur and aluminum. The single crystal of AlB2 is parallel to the hexagon of the matrix.

Aluminum boride is considered a hazardous substance because it reacts with acid and hydrogen to produce toxic gases. For example, it reacts with hydrochloric acid to release borane and aluminum chloride.

The structure of aluminum diboride (AlB 2) is similar to graphite flakes. There is an Al atom between the B atom and the B atom, which is very similar to the structure of magnesium diboride. The AlB 2 single crystal exhibits metal conductivity along an axis parallel to the hexagonal plane of the substrate.

Aluminum boride is considered a hazardous substance because it reacts with acid and hydrogen to generate toxic gases. For example, it reacts with hydrochloric acid to release borane and aluminum chloride.

The crystal structure of AlB2 is often used to describe the prototype structure of intermetallic compounds. There are many structure types in the AlB2 structure family.

Aluminum boride is an ionic compound with a hexagonal crystal structure. Aluminum boride with an absolute temperature of 40K (equivalent to -233°C) will be transformed into a superconductor. Its actual working temperature is 20~30K. To reach this temperature, we can use liquid neon gas, liquid or closed-loop refrigerators to complete the cooling. Compared with the current industry that uses liquid helium to cool niobium alloys (4K), these methods are simpler and more economical. Once carbon or other impurities, magnesium diboride, or energization are added to the magnetic field, the ability to maintain superconductivity is as much as that of niobium alloys, or even better.

Preparation of aluminum boride AlB2 powder

Using amorphous boron powder and aluminum powder as raw materials, powder metallurgy is used to prepare AlB12 powder. X-ray diffractometer and scanning electron microscope were used to determine the phase composition, relative content, and microscopic morphology of the product, and the influence of embedding powder on the phase composition of the product was studied, and the optimal process parameters of the synthesis process were determined. The results show that the Al content of the buried powder determines the types of impurities in the product. The Al content of the buried powder is 30% (mass content, the same below), and there is elemental Al in the product; the Al content of the buried powder is 10%, and the impurities are mainly Al2O3; When the Al content of the buried powder is 20%, the impurity content is the least, mainly in the oxymagnesium aluminum phase. The best synthesis process parameters are: synthesis temperature 1400℃, constant temperature time 60min, 17.2% Al content, and buried powder Al content 20%.

The structure of aluminum boride is similar to that of intermetallic compounds, and its structure mainly depends on the crystal structure of aluminum metal and boron rather than their valence relationship. Aluminum borides are AlB2, AlB4 and AlB12. The diboride AlB2 can be formed by the reaction of two elemental substances above 600°C. It is a layered structure in which Al atoms directly overlap (A, A mode), and B atoms are filled in the triangular pillars formed by the direct overlap of Al atoms, that is, the boron layer is between the two aluminum layers. The boron layer is similar to the graphite structure. The boron atoms are connected in a hexagonal network. The distance between each B atom and the other three B atoms is 0.173nm. There are six Al atoms connected to B, and they occupy the vertices of the triangular column. AlB2 can be dissolved in dilute hydrochloric acid to produce a reducing solution, which may contain HB(OH)+3. AlB2 is insoluble in dilute sulfuric acid, but soluble in nitric acid. AlB2 decomposes to AlB12 above 920℃

Application of aluminum boride AlB2 powder

What is the use of aluminum boride AlB2 powder?

Aluminum boride is a random (or diamond-shaped) white or light yellow powder. It can be used as:

Non-toxic flame retardant,

plastic,

rubber,

textile,

coating,

Superconducting magnets,

Transmission line,

Sensitive magnetic field detector.

Aluminum boride AlB2 powder price

The price of aluminum diboride AlB2 powder varies randomly with the production cost, transportation cost, international situation, exchange rate, and the supply and demand of aluminum diboride AlB2 powder market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for aluminum diboride AlB2 powder, please feel free to contact us to get the latest price of aluminum diboride AlB2 powder.

Aluminum boride AlB2 powder supplier

As a global supplier of aluminum diboride AlB2 powder, Tanki New Materials Co., Ltd. has extensive experience in advanced engineering material properties, applications, and cost-effective manufacturing. The company has successfully developed a series of boride powder materials (including aluminum diboride AlB2 powder, molybdenum boride, tungsten boride, etc.), high-purity targets, functional ceramics and structural devices, and provide OEM services.