【作者】 林中魁； 杜昭良； 骆荣富； 陈锦山； 李丕耀； 林鸿明；

【Author】 LinCK, DuCL, LouhRF, Chen G S, Lee PY, Lin H M(1. De Dept. Mat. Sci,, Feng Chia Univ., Taichung 407,China; 2. Inst. Mat. Eng., Taiwan Ocean Univ., Keelung 202,China; 3. Dept. Mat. Eng., Tatung Univ., Taipei 104, China)

【机构】 逢甲大学材料科学系； 海洋大学材料工程研究所； 大同大学材料科学与工程系；

【摘要】 机械化学合成反应是在球磨过程中,因连续碰撞引起反复之冷焊与脆裂,使机械能转换成化学能,进而产主化学反应的特殊固态机械化学合成法。本研究即是利用此法来探讨球磨Fe₃₃S₆₇,Fe₅₀S₅₀及Fe₆₇S₃₃等起始混合粉末合成铁硫化合物的可能性,并以X光绕射分析、X光吸收光谱等技术观察球磨过程中粉末结构变化之情形。实验结果显示:Fe₃₃S₆₇,Fe₅₀S₅₀及Fe₆₇S₃₃三种组成的铁硫混合粉末都能在球磨过程中发生机械化学反应,而且最终产物皆为Fe_1-xS,当S的比例增加时,Fe_1-xS生成物产生的时间则增加。更多还原

【Abstract】 During the ball milling process, collisions between balls and powders will induce repetitive cold welding and fracturing. Mechanical energy can give rise to chemical reaction and mechanochemical synthesis occurs. In the current study, pure elemental powder mixtures of iron and sulfur with desired compositions of Fe67S33, FeSOSSO and Fe33S67 were ball milled to synthesize iron sulfide powders. X-ray diffraction and absorption spectroscopy were used to investigate the structural evolution during the process. The experimental results show that mechanochemical reactions occurred during the ball milling process for all the compositions investigated. It is observed that Fe^S phase exhibited at the end of milling. The formation time of Fe(1-x)S phase increased with increasing sulfur content.更多还原