过氧乙酸等添加剂对钽电容阴极被覆液性能的影响
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摘要
钽电容器阴极二氧化锰膜是通过浸渍/热分解硝酸锰溶液形成的,为得到致密均匀的Mn O2膜,需要多种浓度硝酸锰溶液进行十余次重复浸渍/热分解。本文在硝酸锰溶液中添加适量过氧乙酸、JFC-2和乙醇,然后对该硝酸锰被覆液进行表面张力测试和差示扫描量热分析(DSC),并对此被覆液形成的Mn O2膜进行扫描电子显微镜分析(SEM)和方块电阻测试。研究结果表明,被覆液的表面张力显著降低,浸润性得以提高;结晶水脱除温度可降低约30℃。经过四次单一浓度硝酸锰被覆液的浸渍/热分解即可得到表面致密均匀、导电性良好的阴极膜,被膜工艺可以得到大大简化。
Cathode MnO_2film of tantalum capacitor is formed by impregnation/pyrolysis of Mn(NO_3)_2solution,and it requires more than ten times of impregnation/pyrolysis of multiple Mn(NO_3)_2solutions to obtain a dense and uniform MnO_2film.An appropriate amount of peracetic acid,JFC-2 and ethanol were added to Mn(NO_3)_2solution,and then the surface tension and differential scanning calorimetry(DSC)of this Mn(NO_3)_2coating liquid were tested.In addition,scanning electron microscopy(SEM)and sheet resistance of the formed MnO_2film were tested.The results show that the surface tension of the coating liquid is significantly decreased and the impregnation ability is improved.Besides,the temperature of losing crystal water is reduced by about 30℃.Moreover,a dense and uniform cathode film with good electrical properties can be obtained via four times of impregnation/pyrolysis of this Mn(NO_3)_2coating liquid,and cathode preparation process can be simplified.
Cathode MnO_2film of tantalum capacitor is formed by impregnation/pyrolysis of Mn(NO_3)_2solution,and it requires more than ten times of impregnation/pyrolysis of multiple Mn(NO_3)_2solutions to obtain a dense and uniform MnO_2film.An appropriate amount of peracetic acid,JFC-2 and ethanol were added to Mn(NO_3)_2solution,and then the surface tension and differential scanning calorimetry(DSC)of this Mn(NO_3)_2coating liquid were tested.In addition,scanning electron microscopy(SEM)and sheet resistance of the formed MnO_2film were tested.The results show that the surface tension of the coating liquid is significantly decreased and the impregnation ability is improved.Besides,the temperature of losing crystal water is reduced by about 30℃.Moreover,a dense and uniform cathode film with good electrical properties can be obtained via four times of impregnation/pyrolysis of this Mn(NO_3)_2coating liquid,and cathode preparation process can be simplified.
引文
[1]李俊.钽电容器被膜技术研究[D].西安:西安电子科技大学,2015.
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[3]DIAS D,CARVALHO P A,LOHWASSER W,et al.On the performance of pyrolytic M n O2/tantalum capacitors:columnar vs.nanocrystalline cathodic layers[J].Acta Mater,2007,55(11):3757-3763.
[4]王文庆.一种超大容量的钽电容器的制备方法:CN105977030A[P].2016-09-28.
[5]王训国,朱志勇.一种中高压固体电解质钽电容器阴极的制备方法:CN106057469A[P].2016-10-26.
[6]刘远元,王安玖,赵泽英,等.一种钽电容器被膜的密致方法:CN104538181A[P].2015-04-22.
[7]易金峰,李俊伟.高温片式钽电容器及其制作方法:CN103366963A[P].2013-10-23.
[8]荣达福.固体钽电解电容器超低ESR阴极技术的研究[D].西安:西安电子科技大学,2015.
[9]齐兆雄.一种电解电容器的阴极制备方法:CN102842434A[P].2012-12-26.
[10]乔建伟,徐云飞.硝酸锰溶液添加硝酸铵对钽电容器电性的影响[J].科技视界,2013(5):71-73.
[2]刘勇刚,易金峰.35V 47μF固体钽电容器制备工艺的改进[J].电子工艺技术,2008,29(2):98-101.
[3]DIAS D,CARVALHO P A,LOHWASSER W,et al.On the performance of pyrolytic M n O2/tantalum capacitors:columnar vs.nanocrystalline cathodic layers[J].Acta Mater,2007,55(11):3757-3763.
[4]王文庆.一种超大容量的钽电容器的制备方法:CN105977030A[P].2016-09-28.
[5]王训国,朱志勇.一种中高压固体电解质钽电容器阴极的制备方法:CN106057469A[P].2016-10-26.
[6]刘远元,王安玖,赵泽英,等.一种钽电容器被膜的密致方法:CN104538181A[P].2015-04-22.
[7]易金峰,李俊伟.高温片式钽电容器及其制作方法:CN103366963A[P].2013-10-23.
[8]荣达福.固体钽电解电容器超低ESR阴极技术的研究[D].西安:西安电子科技大学,2015.
[9]齐兆雄.一种电解电容器的阴极制备方法:CN102842434A[P].2012-12-26.
[10]乔建伟,徐云飞.硝酸锰溶液添加硝酸铵对钽电容器电性的影响[J].科技视界,2013(5):71-73.