(中國有色桂林礦產(chǎn)地質(zhì)研究院有限公司 廣西超硬材料重點實驗室，國家特種礦物材料工程技術研究中心，桂林 541004)
摘 要: 通過共沉淀法制備FeCoCu預合金粉前驅體，對制備過程中的主要影響因素進行了探討，并對前驅體的物相組成、微觀形貌及加熱分解行為進行表征與分析。結果表明，F(xiàn)eCoCu預合金粉前驅體的最佳制備工藝為：在沉淀劑草酸溶液濃度為1.0 mol/L時，反應體系的pH值為2.0，混合金屬鹽溶液濃度為1.0 mol/L，反應溫度為50 ℃，在此條件時既有最高的收得率，也有較細的粉末粒度。SEM及XRD衍射結果表明，前驅體形貌為表面比較光滑的顆粒狀，其主要物相是FeC2O4？2H2O、CoC2O4？2H2O、CuC2O4？nH2O等3種草酸鹽結晶水合物。DSC曲線表明，前驅體在加熱時存在著兩個吸熱峰，分別對應的是草酸鹽沉淀物結晶水的脫水過程和草酸鹽的熱分解過程。
關鍵字: FeCoCu預合金粉；前驅體；制備；性能
（Guangxi Key Laboratory of Superhard Materials, National Engineering and Technology Research Center for Special Mineral Materials, China Nonferrous Metal (Guilin) Geology and Mining Co., Ltd., Guilin 541004, China）
Abstract:The FeCoCu pre-alloyed powder precursors were manufactured by co-precipitation method and the major influence factors of the preparation process were discussed. The phase composition, microstructure and heating decomposition behavior were analyzed. The results show that the optimal preparation parameters are that the pH is 2.0, the solution concentration is 1.0 mol/L and the reaction temperature is 50 ℃ (when the concentration of the precipitant is 1.0 mol/L); under these conditions, the pre-alloyed powders have the highest gain-quotiety and the finest particle size. The SEM images show that the microstructure of the precursors is smooth particle and the XRD patterns show that the FeC2O4？2H2O, CoC2O4？2H2O and CuC2O4？nH2O are the main phases. The DSC curves show that two endothermic peaks exit in the heating process, which correspond to the crystal water dehydration and the oxalates decomposition, respectively.
Key words: FeCoCu pre-alloyed powder; precursor; preparation; property
