In fact, regional melting equipment can be added to make high purity materials such as single crystal silicon or pure metals.It moves the heating coil to melt the material in a small area, and extrudes the impurities by the difference in the distribution of impurities between the solid and liquid phases.
Chemical methods, such as the decomposition of iron pentacarbonyl Fe(CO)5, nickel tetracarbonyl Ni(CO)4 or tantalum pentaiodide TaI5, are also methods for preparing high purity metals
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