鎵及其化合物為一重要且廣泛應用於近代先進工業之稀有元素，資源掌握不易，因而電子工業廢棄物如發光二極體 (LED)之回收已成為此資源之重要來源，值得深入研究。本計畫以溼法與火法程序研究含氮化鎵電子廢料之回收與精鍊，回收產物純度在95.0 ～ 99.99 wt.％範圍內，進而將此產物作為研製中、低溫固態氧化物燃料電池（SOFCs）之鑭鍶鎵鎂（LSGM）氧化物電解質之關鍵原料，採用溶膠凝膠法（sol-gel）製作電解質，進而組裝半電池與全電池，進行測試，開發SOFCs之綠色製造技術，以增進含鎵循環材料之高值化，促進國家與經濟之發展。回收流程之評估，則採用商用軟體模擬，作為未來設計開發商業化實廠萃取連續操作程序之基礎。 ;Metallic gallium and its compound belong to one of rare elements extensively employed in the manufacture of modern industrial products. Due to lack of this resource in our country, recycling of gallium from electronic waste from light-emitted diode (LED) has become an important issue. Reclamation of Ga from the waste resultant from gallium-nitride-based light-emitted diodes by means of both hydrometallurgical and pyrometallurgical processes is the first target of this project. Secondly, the recovered gallium, with purity in the range 95.0 ～ 99.99 wt.％, is acted as a raw material to prepare lanthanum strontium gallium magnesium oxide (LSGM). LSGM is a key component of the electrolyte in the solid oxide fuel cells (SOFCs) which operated at low-intermediate temperature. The sol-gel process is investigated in this work to produce LSGM powders used in the preparation of electrolytes, which are then assembled as half-cell and whole single cells for testing. Both recycling and green manufacturing processes are combined to form a base of high-value-added technology. Simulation is conducted by running a commercial software to estimate the extraction process. The simulated result provides a useful design base for the further scale-up and commercial production.
