品牌: Goodfellow纯度含量: 99.95%产地: 英国
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| 品牌: | Goodfellow | | 纯度含量: | 99.95% | | 产地: | 英国 |
产品介绍 | 订货号 | 包装规格 | | Length (Round) | | 407-055-12 | 25 mm | | 958-211-95 | 50 mm | | 776-487-98 | 100 mm | | 060-996-66 | 150 mm |
产品参数 | Diameter[直径] | 50mm | | Grade[等级] | Graphite | | Length[长度] | 25 mm - 150 mm | | Particle Size[粒径] | Ultrafine 1-5 Microns | | Purity[纯度] | 99.95% | | Typical Analysis(典型分析) | | Al | 5 PPM | | Ba | 1 PPM | | Ca | 50 PPM | | Co | <5 PPM | | Cr | <5 PPM | | Cu | <5 PPM | | Fe | 5 PPM | | Ni | 50 PPM | | Si | <5 PPM | | Ti | 30 PPM | | V | 100 PPM | | Zr | <20 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 |
其他参数 公差 | 直径 | ≤10mm | ±10% |
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| 聚合物 | +20% / -10% | | 陶瓷 | +20% / -10% | |
| >10mm | ±5% | | 陶瓷 | +20% / -10% | | 聚合物 | +20% / -10% | |
| 长度 | <100mm | ±1mm |
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| ≥100mm | +5% / -1% |
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