【摘要】：納米材料的可控制備與應(yīng)用是目前納米材料領(lǐng)域的研究重點(diǎn),通過合理可調(diào)的制備工藝,能獲得人為所需形貌、成分、結(jié)構(gòu)、磁性能的納米材料。本實(shí)驗(yàn)將基于多孔氧化鋁模板(包括商業(yè)氧化鋁濾膜和自制多孔陽極氧化鋁模板)在水溶體系中采用電化學(xué)沉積法制備的La-Fe納米管陣列,系統(tǒng)分析不同直流電位下的生長情況、形貌、結(jié)構(gòu)及磁性能。研究發(fā)現(xiàn),隨著沉積電壓的負(fù)向增大(從-1.05 V降低到-1.3 V),La-Fe納米管有效長度先增后減,出現(xiàn)由沉積電位過大引起的覆蓋式生長,La/Fe原子量比有所增加。樣品系非晶結(jié)構(gòu),沒有擇優(yōu)生長取向。納米管樣品在平行、垂直納米管軸方向上的磁各向異性逐漸減弱,飽和磁化強(qiáng)度逐漸減小,越來越不容易被磁化。相比商業(yè)氧化鋁模板中的La-Fe納米管,自制氧化鋁模板內(nèi)得到的La-Fe納米管有效解決了單根納米管之間的融通現(xiàn)象,制備過程中調(diào)節(jié)開孔、擴(kuò)孔時(shí)間可使AAO模板的孔徑具備一定選擇性。最后,對(duì)二次氧化法自制AAO模板流程及其生長機(jī)理進(jìn)行簡要陳述。
[Abstract]:The controllable preparation and application of nanomaterials is the focus of research in the field of nanomaterials at present. Through a reasonable and adjustable preparation process, the desired morphology, composition, structure and magnetic properties of nanomaterials can be obtained. In this study, La-Fe nanotube arrays were prepared by electrochemical deposition in aqueous solution system based on porous alumina templates (including commercial alumina filter membranes and self-made porous anodic alumina templates). The growth, morphology, structure and magnetic properties of different DC potential were systematically analyzed. It was found that with the increase of the deposition voltage (from -1.05 V to -1.3 V), La-Fe nanotubes), the effective length of nanotubes first increased and then decreased, resulting in overlying growth caused by excessive deposition potential. The atomic weight ratio of La/Fe has increased. The sample is amorphous and has no preferred growth orientation. The magnetic anisotropy of nanotube samples in parallel and perpendicular direction decreases gradually, and the saturation magnetization decreases gradually, so it is less and less easy to be magnetized. Compared with the La-Fe nanotubes in the commercial alumina template, the La-Fe nanotubes obtained from the self-made alumina templates can effectively solve the problem of single nanotubes, and adjust the opening during the preparation process. The pore size of AAO template can be selected by reaming time. Finally, the process and growth mechanism of AAO template made by second oxidation method were briefly described.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB383.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 陸梅,覃東歡,力虎林;多孔氧化鋁膜的制備及其表征(英文)[J];蘭州大學(xué)學(xué)報(bào);2002年04期

相關(guān)碩士學(xué)位論文 前1條

1 閆永彥;釤鈷合金納米管的電化學(xué)調(diào)控和磁性能研究[D];內(nèi)蒙古大學(xué);2013年

，

本文編號(hào)：2366090