Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Aluminium diboride (AlB2) is a chemical compound made from the metal aluminium and the metalloid boron. It is one of two compounds of aluminium and boron, the other being AlB12, which are both commonly referred to as aluminium boride.
Structurally the B atoms form graphite-like sheets with Al atoms between them, and this is very similar to the structure of magnesium diboride. Single crystals of AlB2 exhibit metallic conductivity along the axis parallel to the basal hexagonal plane.[3]
Aluminium boride is considered a hazardous substance as it reacts with acids and hydrogen gas to produce toxic gases. For example, it reacts with hydrochloric acid to release borane and aluminium chloride.
The crystal structure of AlB2 is often used as a prototype structure to describe intermetallic compounds. There are a large number of structure types that fall within the AlB2 structural family.[4]
^ abcHaynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.45. ISBN 1-4398-5511-0.
^Felten, Edward J (1956). "The Preparation of Aluminium Diboride, AlB21". Journal of the American Chemical Society. 78 (23): 5977–5978. doi:10.1021/ja01604a003.
^Burkhardt, U; Gurin, Vladimir; Haarmann, Frank; Borrmann, Horst; Schnelle, Walter; Yaresko, Alexander; Grin, Yuri (2004). "On the electronic and structural properties of aluminium diboride Al0.9B2". Journal of Solid State Chemistry. 177 (2): 389. Bibcode:2004JSSCh.177..389B. doi:10.1016/j.jssc.2002.12.001.
^Hoffmann, R.-D.; Pöttgen, Rainer (2001-01-01). "AlB2-related intermetallic compounds – a comprehensive view based on group-subgroup relations". Zeitschrift für Kristallographie - Crystalline Materials. 216 (3). Walter de Gruyter GmbH: 127–145. Bibcode:2001ZK....216..127H. doi:10.1524/zkri.216.3.127.20327. ISSN 2196-7105. S2CID 98251655.
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Aluminiumdiboride (AlB2) is a chemical compound made from the metal aluminium and the metalloid boron. It is one of two compounds of aluminium and boron...
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Zirconium diboride (ZrB2) is a highly covalent refractory ceramic material with a hexagonal crystal structure. ZrB2 is an ultra-high temperature ceramic...
00:1.85. Rhenium diboride also has a reported bulk modulus of 383 GPa and a shear modulus of 273 GPa. The hardness of rhenium diboride, and most other...
comparable to that of tungsten carbide, silicon carbide, titanium diboride or zirconium diboride. Similarly, AlMgB14 + TiB2 composites possess high hardness...
200 kA, citing lower volume and material demand as advantages. Magnesium diboride is a much cheaper superconductor than either BSCCO or YBCO in terms of...
radiation (1–2 keV). Yttrium diboride has the same hexagonal crystal structure as aluminiumdiboride and magnesium diboride – an important superconducting...
and must adhere to the following criteria; Consist of Alumina, Titanium diboride, Zirconia, Silicon Carbide, Silicon nitride or any solid stabilizer materials...
conductive. Materials used can be e.g. tantalum diboride, titanium diboride, zirconium diboride, niobium diboride, tantalum carbide, zirconium carbide, tantalum...
Rhenium diboride (ReB2) is a hard compound having a hardness similar to that of tungsten carbide, silicon carbide, titanium diboride or zirconium diboride. Dirhenium...
oxidizer for some metal fuels Boron – oxidizer for titanium, forming titanium diboride Corresponding sodium salts can be substituted for potassium ones. Coolants...
from brittle superconducting materials such as niobium–tin or magnesium diboride, and ceramic cuprate superconductors such as BSCCO. It has been used to...
worked at the aluminium company Rio Tinto Alcan.[2] She used nanoscale secondary ion mass spectrometry to study titanium doped magnesium diboride during her...
Research Probe (SHARP). These TPS materials are based on zirconium diboride and hafnium diboride. SHARP TPS have suggested performance improvements allowing...
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additive during the liquid-phase sintering of silicon nitride and zirconium diboride. Small amounts of lanthanum added to steel improves its malleability, resistance...
superconductor suitable for hydrogen cryomagnetic use is magnesium diboride. Magnesium diboride is a conventional superconductor and it can be prepared in flexible...
higher borides have been grown in a low melting metal (e.g. Sn, Cu, Al). Diborides, LnB2, have been reported for Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. All...
dark-gray solids with the hardness increasing with the boron content. Samarium diboride is too volatile to be produced with these methods and requires high pressure...
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