What is Aluminum Boride?

Author : Trunnano

Update time : 2022-03-09 11:08:20

What is Aluminum Boride?
Aluminum boride is a binary compound formed by aluminum and boron. The chemical formula is AlB2. It is a red solid under normal temperature and pressure. It loses its surface luster when heated. It is stable in cold dilute acid, and decomposes in hot hydrochloric acid and nitric acid. , which is obtained by heating and reacting fine powders of aluminum and boron after mixing.
The characteristics of Aluminum Boride
Aluminum Boride is a black glossy monoclinic crystal with a specific gravity of 2.55 (18°C), insoluble in water, acid and alkali, decomposed in hot nitric acid, and obtained by melting boron trioxide, sulfur and aluminum together. 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 liberate borane and aluminum chloride. Structurally, B atoms form graphite-like sheets with Al atoms between them, which is very similar to the structure of magnesium diboride. A single crystal of AlB2 exhibits metallic conductivity in an axis parallel to the hexagonal plane of the substrate.

Aluminum Diboride AlB2 Powder Properties
Other Names	aluminium boride, aluminum diboride, AIB2
CAS No.	12041-50-8
Compound Formula	AlB2
Molecular Weight	48.604 g/mol
Appearance	Copper-red solid
Melting Point	>920 °C (decomposes)
Solubility in water	Insolutable
Density	3.19 g/cm3
Purity	>98.5%
Particle Size	5-10um
Poisson's Ratio	N/A
Specific Heat	N/A
Thermal Conductivity	N/A
Thermal Expansion	N/A
Young's Modulus	N/A
Exact Mass	49.000149
Monoisotopic Mass	49.000149

Aluminum Diboride AlB2 Powder CAS 12041-50-8

The preparation method of aluminum iboride
Using amorphous boron powder and aluminum powder as raw materials, AlB12 powder was prepared by powder metallurgy method. X-ray diffractometer and scanning electron microscope were used to determine the phase composition, relative content, and microscopic morphology of the product, respectively. The results show that the buried powder Al content determines the types of impurities in the product. The buried powder Al content is 30% (mass content, the same below), and elemental Al exists in the product; the buried powder Al content is 10%, and the impurities are mainly Al2O3; When the Al content of the buried powder is 20%, the impurity content is the least, which is mainly oxy-magnesium-aluminum phase. The optimum process parameters for synthesis are: synthesis temperature 1400℃, constant temperature time 60min, Al content of 17.2%, and Al content of buried powder 20%.
The applications of Aluminum Boride
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 generated by the reaction of two elements above 600℃. It is a layered structure, Al atoms are directly overlapped (A, A mode), and B atoms are filled in the triangular column formed by the direct overlap of Al atoms, that is, the boron layer is between the two aluminum layers. [3] The structure of the boron layer is similar to that of graphite. The boron atoms are connected into a hexagonal network. The distance between each B atom and the other three B atoms is 0.173 nm. There are six Al atoms connected to the B, which occupy the vertices of the triangular prism superior. 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 form AlB12 above 920°C.
The main supplier of Aluminum Boride
Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional boride powder supplier with over 12 years experience in chemical products research and development. We accept payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.
If you are looking for high quality amorphous boron powder, please feel free to contact us and send an inquiry.

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