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題名 | 超高純度鎵精煉技術開發=Refining Technology of Gallium Metal with Super High Purity |
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作者姓名(中文) | 楊先仁; 黃啟輝; 王振興; 林昇煌; 施修正; 鄭名津; 陳麗娟; | 書刊名 | 遠東學報 |
卷期 | 30:3 2013.12[民102.12] |
頁次 | 頁249-257 |
分類號 | 440.35 |
關鍵詞 | 鎵純化; 超音超化學萃取; 電解精煉; 高溫熱處理; Purification of Gallium; Supersonic chemical extraction; Electrorefine; Thermal treatment; |
語文 | 中文(Chinese) |
中文摘要 | 本研究主要將回收自砷化鎵之粗鎵進行精煉提純,以增加砷化鎵廢棄物之經濟價值,間接提高砷化鎵之回收再利用率,達到減廢及環境保護之目的,並使其可作為本國精密電子產品之原料,提升本國電子產業的競爭力。本研究所使用的原料鎵最初不純物的濃度為5693 ppm,透過超音波酸液萃取(硝酸、硫酸及鹽酸)、電解精煉(兩次)、超音波硫酸萃取、離心法及高溫熱處理,使金屬鎵的最終純度達到99.9999 wt.% (即6 N)以上。由實驗結果得知,精鎵原料中主要不純物為Sn、Si、Fe、Cu、Zn、Ni、Ag、In、Ca、Bi、Na、As、Pb及P,粗鎵的起始純度為2N4(即純度99.4 wt.%)。經過超音波酸液萃取(依序為硝酸、硫酸、鹽酸)後,純度可提升至3N3(即99.93 wt.%)。隨後利用鹼性溶液做為電解液,經過兩次電解精煉後金屬鎵純度可達到4N8 (99.998 wt.%)。此時不純物的主要成份包括銅、砷及鉛。最後利用超音波硫酸萃取法去銅,以離心法去鉛,最後利用高溫熱處理法去砷,金屬鎵的最終純度可提高到6 N (99.9999 wt.%)以上,達成製作超高純度鎵的目地。高溫熱處理法必須於最後的程序進行,可防止鎵與其它金屬雜質形成合金,鎵合金的形成會提高雜質去除與鎵純化的難度。 |
英文摘要 | The aim of this study is mainly to refine Gallium which is recycled from Gallium Arsenide in order to increase its economic value. That will increase Gallium Arsenide recycling and achieve the aims of reducing waste and environmental protection. In this study the 99.4 % Gallium (5693 ppm impurity) is used to purify by means of supersonic chemical extraction, electrorefine, centrification method and thermal treatment in order to get 99.9999% (6N) Gallium. The use of nitric acid, sulfuric acid, and hydrochloric acid to proceed supersonic chemical extraction can eliminate impurities of Gallium. The loss rate of Gallium was nitric acid (the most), sulfuric acid (the second), and hydrochloric acid (the least) separately. After two electrorefine processes, the impurity concentration of the sample was down to 18.24 ppm. The purification of Gallium had reached to 4N8, and the rest components of impurities in the Gallium are mainly As, Cu and Pb. Furthermore, Supersoinci chemical extraction with sulfuric acid, certrification method and high temperature process are applied to remove Cu, Pb and As respectively. The final purity of Ga can be above 99.9999 wt.% (6 N). The high temperature thermal treatment should be processed in the last resort to avoid the formation of Ga alloy. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。