(1. 哈爾濱工業(yè)大學(xué)(威海) 材料科學(xué)與工程學(xué)院，威海 264209；
2. 哈爾濱工業(yè)大學(xué)(威海) 海洋科學(xué)與技術(shù)學(xué)院，威海 264209)
摘 要: 為了提高氫化態(tài)Mg-Mn復(fù)合物的水反應(yīng)性能，采用改變反應(yīng)水溶液pH值和在水溶液中加入不同助劑的方法，通過測量反應(yīng)過程中不同時刻產(chǎn)生的氫氣量對助劑在水反應(yīng)中的作用進(jìn)行表征，利用SEM和XRD等測試手段對反應(yīng)產(chǎn)物進(jìn)行表征和測試，對反應(yīng)機(jī)理進(jìn)行分析。結(jié)果表明：改變反應(yīng)溶液的pH值對反應(yīng)程度及放氫速率的影響不大，且pH值越大，越不利于反應(yīng)的進(jìn)行；在溶液中添加助劑焦磷酸鉀、六偏磷酸鈉、羥基乙叉二膦酸(HEDP)對提高氫化態(tài)Mg-Mn復(fù)合物的放氫速率有顯著促進(jìn)作用；相比之下，應(yīng)采用添加磷酸鹽助劑的方法來改善氫化態(tài)Mg-Mn復(fù)合物水反應(yīng)性能。
關(guān)鍵字: 氫化態(tài)Mg-Mn復(fù)合物；助劑；水反應(yīng)性能
（1. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China;
2. School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China）
Abstract:In order to improve the water reaction performance of hydrogenated Mg-Mn composites, the pH value of the hydrolysis solution was changed and different additives were added in the solution. The amount of hydrogen produced by different kinds of samples was used to characterize the hydrolysis reactivity. SEM, XRD and other testing methods were used to characterize and test the hydrolysis products. The reaction mechanism was analyzed. The results show that changing the pH value of the reaction solution has a little influence on the hydrolysis rate and the reaction degree, and the higher the pH value, the more disadvantageous the reaction. The addition of additives of the potassium pyrophosphate, sodium hexametaphosphate and HEDP plays a significant role in promoting the hydrogen desorption rate. In contrast, the method of adding phosphate additives should be used to improve the water-reactive properties of the hydrogenated Mg-Mn composites.
Key words: hydrogenated Mg-Mn composites; additives; water reaction performance
