Chromium is a chemical element which has the symbol Cr and atomic number 24. It is a steel-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odourless, tasteless, and malleable.
| Symbol | Cr | Ionic radius(6-coordinate)/pm IV | 55 |
| Atomic number | 24 | Density (20°C)/gcm-3 | 7.14 |
| No. of naturally occurring isotopes | 4 | Melting point / °C | 1900 |
| Atomic weight | 51.996 | Boiling point / °C | 2690 |
| Electronic configuration | [Ar]3d54s1 | ΔHfus/kJmol-1 | 21 (+/-2) |
| Ionization energy/kJmol -1 | 653 | ΔHvap/kJmol-1 | 342 (+/-6) |
| II | 1592 | ΔHf(monoatomic gas)/kJmol-1 | 397 (+/-3) |
| III | 2987 | Electrical resistivity | |
| Metal radius(12-coordinate)/pm | 128 | (20°C)/ μohm cm | 13 |
| Ionic radius(6-coordinate)/pm VI | 44 | Electronegativity χ | 1.6 |
| Ionic radius(6-coordinatc)/pm V | 49 |
| Temperature (oC) @Vap. Pressure | Techniques | Remarks | |||||
| 10-8 Torr | 10-6 Torr | 10-4 Torr | Electron Beam | Crucible | Coil | Boat | |
| 837 Sublimes | 977 Sublimes | 1157 Sublimes | Good | Vitreous Graphite | Tungsten | Cr plated rod or strip | Films very adherent. High rates possible. Cr plated rods are ideal for depositing Cr. |
| Cr | |||||
| Precision Alloys | |||||
| Alloy | Din Symbol | Electrical Resistivity at 20°C | Conductivity | Density | |
| μΩ/Cm | S/W | g/cm3 | |||
| NEXOHM® | NiCr20AlSi | 132 | 0.76 | 8 | |
| NEXTMNC6015 | NiCr6015 | 111 | 0.90 | 8.2 | |
| NEXTMNC8020 | NiCr8020 | 108 | 0.93 | 8.3 | |
| NEXTMNC3020 | NiCr3020 | 104 | 0.96 | 7.9 | |
| NEXTMCC0.3 | CuCr0.3 | 1.92 | - | 8.9 | |
| Thermo-electric Alloys | |||||
| Model No. | Symbol | Melting Point | Temp Tolerance | Temp Range | |
| °C | °C | ||||
| KP | Ni, Si, Fe,Cr | 1430 | ±2.2°C or ±0.75% (t90) | 0 to 1260 | |
| NP | Ni, Si, Cr | 1394 | ±2.2°C or ±0.75% (t90) | 0 to 1260 | |
| EP | Ni, Si, Fe,Cr | 1430 | ±1.7°C or ±0.5% (t90) | 0 to 870 | |
| KPX | Ni, Si, Fe,Cr | 1430 | ±2.2°C | 0 to 200 | |
| NPX | Ni, Si, Cr | 1394 | ±2.2°C | 0 to 200 | |
| EPX | Ni, Si, Fe, Cr | 1430 | ±1.7°C | 0 to 200 | |
| Sputtering Targets | |||||
| Matierial | Symbol | Atomic Number | Thermal Conductivity | Theoretical Density | |
| W/m.K | g/cc | ||||
| Chromium_Cr | Cr | 24 | 94 | 7.2 | |
| Evaporation Materials | |||||
| Matierial | Symbol | Atomic Number | Thermal Conductivity | Theoretical Density | |
| W/m.K | g/cc | ||||
| Cr ( pieces ) | Cr | 24 | 94 | 7.2 | |
Below is the periodic table of chemical elements.The elements in red are the ones Nexteck's product contain. Click them, you will come to the details.
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