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- Rhenium (Re) Metal & Powder Synonyms:
rhenium metal, Re, rhenium powder, rhenium slug, rhenium sheet, rhenium foil, rhenium wire, rhenium rod, CAS# 7440-15-5, renio, relementar, rhenium on alumina, rhenium ion(Re7), rhenium ion(Re7), rhenium nitrate solution, rhenium standard for AAS,
Chemical Name: Rhenium
Chemical Formula: Re
Retaining its crystalline structure at temperatures up to its melting point, rhenium is gray to black in powder form, silvery-white and lustrous as a solid. It does not occur naturally. Rhenium has one of the highest densities, exceeded only by platinum, iridium, and osmium. Only tungsten and carbon have higher melting points. Rhenium has good wear resistance and it can withstand arc corrosion. Rhenium's range of valences exceeds that of all other elements.
99.99%
3-6 mm pieces, slug, foil, wire, rod, 325 mesh by down powder
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Atomic Number
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75
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Molecular Weight (g/mol.)
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186.2
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Apparent Density (g/cm3)
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21.00 to 21.02
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Electronegativity (Pauling scale)
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1.9
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Specific Heat @25°C (cal/g-°C)
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.033
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Melting Point (°C)
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3157 to 3181
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Boiling Point (°C)
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5900
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Thermal Conductivity (cal/s-cm°C)
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.095
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| Electrical Resistivity |
18.7 to 20.0
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Fracture Toughness
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120 to 150
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Poisson Ratio
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0.30
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Mohs hardness
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7.0
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Crystallography
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hexagonal structure
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Rhenium is used in platinum-rhenium catalysts which in turn are primarily used in making lead-free, high-octane gasoline and in high-temperature superalloys that are used to make jet engine parts.
Other uses:
1) Widely used as filaments in mass spectrographs and in ion gauges.
2) An additive to tungsten and molybdenum-based alloys to increase ductility in these alloys.
3) An additive to tungsten in some x-ray sources.
4) Rhenium catalysts are very resistant to chemical poisoning, and so are used in certain kinds of hydrogenation reactions.
5) Electrical contact material due to its good wear resistance and ability to withstand arc corrosion.
6) Thermocouples containing alloys of rhenium and tungsten are used to measure temperatures up to 2200 °C.
7) Rhenium wire is used in photoflash lamps in photography.
8) Rhenium forms rhenium diboride with boron. 9) It is a compound noted for its extreme hardness.
10) Isotopes of rhenium are radioactive. The 188 isotope, with a half-life of 69 days, has been tested for treatment of liver cancer. The 188 isotope may be obtained in the form of a generator.
11) Related by periodic trends, rhenium has a similar chemistry with technetium; work done to label rhenium onto target compounds can often be translated to technetium. This is useful for radiopharmacy, where it is difficult to work with technetium - especially the 99m isotope used in medicine - due to its expense and short half-life.
12) For use in booster rocket engines" Source: Wikipedia
- Rhenium (Re) Metal & Powder Outlook- 2010 to 2015:
1) Rhenium: Market Outlook to 2015:
a) The rhenium market went through a significant downward correction in 2009 after a period of strong demand growth and an ea) scalation in prices up to the last quarter of 2008. The credit crisis and associated recession, particularly in North America and Europe, severly affected the major markets for rhenium and demand dropped by 16% in 2009. Primary production of rhenium responded by falling by almost 10%, but this was not enough to stop prices plummeting from a peak of USD $12,000/kg on a spot basis towards the end of 2008 to around USD $4-4,500/kg in mid 2009 before bottoming out. In June 2010, rhenium metal prices were USD $4,500-5,000/kg.
b) Those economies that were worst affected following the credit crisis are now beginning to recover and the rhenium market is expected to follow suit. Growth in demand for rhenium is forecast to average around 5%py between 2009 and 2015, driven by a superalloy sector that accounts for almost 80% of rhenium consumption. Expansions in primary production capacity, greater recycling of rhenium-bearing superalloy scrap and increased use of superalloy ‘revert’ will all contribute to future. Source: Roskill
c) A new CY 2010 application-- near-room temperature electroplating using non-toxic bath is a promising alternative to apply uniform Re and Re alloy coatings on complex shapes. Source: AMMTIAC Quarterly (5-1)
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CAS# 7440-15-5
3089
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