品牌: Goodfellow纯度含量: 99.997%产地: 英国
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| 品牌: | Goodfellow | | 纯度含量: | 99.997% | | 产地: | 英国 |
产品介绍 | 订货号 | 包装规格 | | Disc | | 071-978-79 | 50.8mm | | 408-746-76 | 57mm |
产品参数 | Diameter[直径] | 50.8mm - 57mm | | Purity[纯度] | 99.997% | | Thickness[厚度] | 1mm | | Typical Analysis(典型分析) | | Al | 0.2 PPM | | B | 1 PPM | | Ca | 0.05 PPM | | Cu | 0.01 PPM | | Fe | 0.2 PPM | | Mg | 0.05 PPM | | Na | 0.02 PPM | | Si | 1 PPM | | Thermal Properties(热性能) | | Coefficient of thermal expansion ( x10⁻⁶ K⁻¹ ) | 0.600 - 4.300 @0-100℃ | | Melting point ( C ) | 3650.00 | | Specific heat ( J K⁻¹ kg⁻¹ ) | 712.0 @25℃ | | Thermal conductivity ( W m⁻¹ K⁻¹ ) | 80.00 - 240.00 @0-100℃ | | Mechanical Properties(机械性能) | | Bulk modulus ( GPa ) ( Diamond ) | 542.0 | | Bulk modulus ( GPa ) ( Graphite ) | 33.0 | | Hardness - Mohs ( Diamond ) | 10.00 | | Hardness - Mohs ( Graphite ) | 0.50 - 1.00 | | Material condition | Diamond | | Material condition | Graphite | | Tensile modulus ( GPa ) ( Graphite ) | 4.80 | | Atomic Properties(原子属性) | | Atomic number | 6 | | Atomic weight ( amu ) | 12.01100 | | Crystal structure | Hexagonal/Diamond | | Electronic structure | He2s²2p² | | Ionisation potential ( No./eV ) | 6 / 490 | | Ionisation potential ( No./eV ) | 4 / 64.5 | | Ionisation potential ( No./eV ) | 1 / 11.26 | | Ionisation potential ( No./eV ) | 3 / 47.9 | | Ionisation potential ( No./eV ) | 2 / 24.38 | | Ionisation potential ( No./eV ) | 5 / 392 | | Natural isotope distribution ( Mass No./% ) | 12 / 98.89 | | Natural isotope distribution ( Mass No./% ) | 13 / 1.11 | | Photo-electric work function ( eV ) | 4.80 | | Thermal neutron absorption cross-section ( Barns ) | 0.0034 | | Valences shown | 2 , 3, 4 | | Physical Properties(物理性质) | | Boiling point ( C ) | 5000 | | Density ( g cm⁻³ ) | 2.250 @20℃ | | Electrical Properties(电气特性) | | Electrical resistivity ( μOhmcm ) | 1375@0℃ | | Thermal emf against Pt (cold 0C - hot 100C) ( mV ) | 0.70 |
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