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    Rhenium Diboride Powder

    Rhenium Diboride Powder
  • Rhenium Diboride Powder
  • 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 along with 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 specification.

    Related Products of Rhenium Diboride Powder

    Rhenium Powder Rhenium Bar Rhenium Plate Rhenium Foil Rhenium Strip
    Rhenium Sputtering Target Rhenium Wire Rhenium Ribbon Rhenium Diboride Powder Rhenium Crucible
    Rhenium Pellet Special Rhenium Alloys Rhenium Rod Rhenium Sheet  

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