(1. 東北大學 材料各向異性與織構教育部重點實驗室，沈陽 110819;
2. 新疆眾和股份有限公司，烏魯木齊 830013)
摘 要: 采用X射線衍射儀定量檢測立方織構，采用二次離子質譜儀分析鋁箔表層Zn元素分布，采用掃描電子顯微鏡觀察腐蝕結構，研究Zn含量對高壓電解電容器陽極鋁箔腐蝕結構及比電容的影響。結果表明：當Zn含量由1.9×10−6(質量分數(shù)，下同)提高至2.0×10−5時，鋁箔立方織構的體積分數(shù)仍可達到95%，Zn更多地富集于鋁箔表面，導致腐蝕結構均勻，進而使陽極在520 V時的比電容由0.666 μF/cm2增加到0.689 μF/cm2。
關鍵字: 電解電容器；高壓鋁箔；微量鋅；比電容
（1. Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education,
Northeastern University, Shenyang 110819, China;
2. Xinjiang Joinworld Co., Ltd., Urumqi 830013, China）
Abstract:The influences of the Zn content on the corrosion structure as well as the specific capacitance of the aluminum anode foils used in high voltage electrolytic capacitors were investigated. The cube texture of the foils was characterized by X-ray diffractometer (XRD) quantitatively and the distribution of Zn in the foils was measured by secondary ion mass spectrometer (SIMS). The corrosion structure of the etched foils was characterized by scanning electron microscope (SEM). The results show that when the Zn content of the foils varies from 1.9×10−6 (mass fraction) to 2.0×10−5, the cubic texture maintains at 95% (volume fraction), the surface segregation of Zn significantly increases, the corrosion structure becomes more homogeneous and the specific capacitance of the anode foils measured at 520 V increases from 0.666 μF/cm2 to 0.689 μF/cm2.
Key words: electrolytic capacitor; high voltage aluminum foil; trace zinc; specific capacitance
