| Summary: | 碩士 === 遠東科技大學 === 材料科學與工程研究所 === 103 === Gallium metal content of the earth's crust is very rare, and there is no independent source of exploitation, but in recent years has gradually increased the amount of use of electronic technology industry, and therefore the elements gallium recovery and refining interests was important, mainly to be able to cut costs and reduce the foreign dependence on imports. This study was carried out for the purity of purified 2N (99 wt.%) Of the metal gallium, to recover the material as a starting material, the waste into usable resources. Techniques used include chemical extraction method, ultrasonic chemical extraction, crystallization and electrolytic refining method. From the results of the experiment showed that although the recovery crystallization can reach 100%, but only to the purified gallium 2N.%to99.98 wt. Ultrasonic chemical extraction method is mainly for chemical extraction in ultrasound environment, the use of chemical purity gallium extraction can be increased to 99.990wt.%, Ultrasonic chemical purity gallium extraction rule can be increased to 99.996wt.%. If using electrolytic refining industry electrolyte purity gallium only up 99.93wt.%, Terms of gallium oxide soluble in sodium hydroxide as the electrolyte, gallium can be increased to more than purity.% 99.9969 wt.
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