简介概要

Fe杂质对高纯铝箔再结晶织构及比电容的影响

来源期刊:中国有色金属学报1999年第1期

论文作者:张新明 孟亚 周卓平 周鸿章

文章页码:19 - 24

关键词:电容铝箔,高纯铝,立方织构,再结晶,比电容

Key words:capacitor aluminium foil, high pure aluminium, cube texuture, recrystallization, specific capacitance

摘    要:对不同杂质含量的高纯铝锭按特定生产工艺得到高压阳极软态光箔和腐蚀箔。 采用X射线衍射法测得板面晶面衍射强度, 蚀坑法显示晶粒取向形貌, 采用极图、 取向分布函数(ODF)研究晶粒取向及其分布情况。 研究了铝箔再结晶织构随Fe等杂质含量的变化, 分析了Fe杂质元素对铝箔再结晶行为的影响。 借助扫描电镜观察箔材腐蚀坑形貌, 并分析沿不均匀的亮区、 暗区成分的分布。 研究结果表明: 铝箔的再结晶织构主要由立方织构{100}〈001〉及R织构{124}〈211〉构成, 两者的相对强弱随Fe等杂质含量有规律地变化。 铝箔的比电容随立方织构的增加而增加。 铝箔的再结晶行为及腐蚀性能受Fe等杂质含量与分布的控制。 这些研究结果为探索高压阳极电容铝箔的最佳Fe等杂质含量范围、 制定最佳生产工艺, 获得高比例的立方织构(>88%)和高比电容(>1.0μF/cm2, 375V)提供了理论依据和实验资料。

Abstract: High pure aluminium (>99.99%) foils were investigated for the effects of Fe impurity (1~4)×10-5 on the recrystallization textures by means of X-ray diffraction, pits-etching. The pole figures were measured and ODF’s were also calculated by Bunge method. The specific capacitances of the studied foils were determined as well. It was shown that with decreasing of Fe content cube texture in the foils increases, while R texture decreases, the specific capacitance of the foils increases with cube texture. By systematic investigation of the influence of Fe content on the recrystallization textures, it was derived that cube texture dominated (≥88 volume fraction) and the microstructure was homogeneous much more if the contents of the element Fe were smaller than the limit (about 10-5), which would be caused by Fe content for from equilibrium staturation and no precipitates formed during the recrystallization annealing. It was also showed that the inhomogeneities of compositions and microstructure in the foils often occurred if the segregation of Fe came into being before the recrystallization.



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