Rhenium Diboride Powder

Rhenium Diboride Powder

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Rhenium Diboride Powder

Rhenium diboride (ReB2) is a synthetic superhard material. It was first synthesized in 1962, and re-emerged recently due to hopes of achieving high hardness comparable to that of the diamond. However, the ultrahigh hardness has not been confirmed.

The production method of this material does not involve high pressures as with other hard synthetic materials, such as cubic boron nitride, which makes production cheap. However, rhenium itself is an expensive metal.
The compound is formed from a mixture of rhenium, noted for its resistance to high pressure, and boron, which forms short, strong covalent bonds with rhenium.
Chemical Formulas: ReB2

Rhenium Diboride Powder Specifications

Molar Mass (g/mol.) 207.83l
Density (g/cm3) 12.7
Tap Density (g/cm3)
Freezing Point (°C)
Melting Point (°C) 2400
Specific Surface Area (m2/g)
Thermal Conductivity (W/cm·K)
Knoop Hardness (1200 kgf/mm2)
Crystal Structure Hexagonal
Solubility In Water None
Appearance Black powder

General Properties of Rhenium Diboride Powder

1) Two factors contribute to ReB2’s excellent hardness: a high density of valence electrons and an abundance of short covalent bonds. In chemistry, valence electrons are the electrons in the outermost shell. Rhenium has one of the highest valence electron densities among any transition metal (476 electrons/nm3, as compared to 572 electrons/nm3 for osmium and 705 electrons/nm3 for diamond). Osmium is a chemical element with the symbol Os and Atomic number 76. The addition of boron requires only a 5% expansion of the rhenium lattice because the small boron atoms fill the existing spaces between the rhenium atoms. Furthermore, the electronegativities of rhenium and boron are close enough. “Electronegativity” is the opposite of “Electropositivity,” which describes an element’s ability to donate electrons 9 and 2. 04 on the Pauling scale) that they form covalent bonds in which the electrons are shared almost equally.

2) Although ReB2 is harder than diamond in certain directions, it exhibits considerable anisotropy because of its layered hexagonal structure. Anisotropy is the property of being directionally dependent as opposed to Isotropy, which means homogeneity.

Synonyms of Rhenium Diboride Powder

Rhenium boride, B2Re, rhenium diboride, rhenium boron, Re-B, rhenium boride, 99.5% (metals basis), metal boride, CAS# 12355-99-6.

Chemical Properties of Rhenium Diboride Powder

Up to 99.999%

Physical Properties of Rhenium Diboride Powder

Powder, ingot, lump, chunk, target

Typical Applications of Rhenium Diboride Powder

1) Cutting and polishing tools
2) Wear resistant coatings
3) Corrosion resistant coatings
4) Industrial abrasive

Rhenium Diboride Powder Package

Requirements vary as per customer specifications.

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