-
公开(公告)号：US11626257B2
公开(公告)日：2023-04-11
申请号：US16634188
申请日：2018-06-05
发明人： Shuhei Enoki , Yuta Shimizu , Masahiko Katano , Toshifumi Taira , Kazuya Fujimoto , Shinya Sone
摘要： When manufacturing an electrode for an electrolytic capacitor, in a first hydration step (ST1), an aluminum electrode is immersed in a first hydration processing solution having a temperature of at least 70° C. and comprising pure water or an aqueous solution to which phosphoric acid or a phosphate has been added so that the phosphorus concentration is no greater than 4 mass ppm. In a second hydration step (ST2), the aluminum electrode is immersed in a second hydration processing solution to which phosphoric acid or a phosphate has been added so that the phosphorus concentration is 4-5000 mass ppm, the second hydration processing solution having a pH of 3.0-9.0 and a temperature of at least 70° C. In a chemical conversion step (ST3), at least a boric acid chemical conversion process in which the aluminum electrode is chemically converted in a boric acid-based chemical conversion solution is included, and a chemical conversion coating having a coating withstand voltage of at least 200 V is formed on the aluminum electrode.
-
公开(公告)号：US20200227209A1
公开(公告)日：2020-07-16
申请号：US16634188
申请日：2018-06-05
发明人： Shuhei ENOKI , Yuta SHIMIZU , Masahiko KATANO , Toshifumi TAIRA , Kazuya FUJIMOTO , Shinya SONE
摘要： When manufacturing an electrode for an electrolytic capacitor, in a first hydration step (ST1), an aluminum electrode is immersed in a first hydration processing solution having a temperature of at least 70° C. and comprising pure water or an aqueous solution to which phosphoric acid or a phosphate has been added so that the phosphorus concentration is no greater than 4 mass ppm. In a second hydration step (ST2), the aluminum electrode is immersed in a second hydration processing solution to which phosphoric acid or a phosphate has been added so that the phosphorus concentration is 4-5000 mass ppm, the second hydration processing solution having a pH of 3.0-9.0 and a temperature of at least 70° C. In a chemical conversion step (ST3), at least a boric acid chemical conversion process in which the aluminum electrode is chemically converted in a boric acid-based chemical conversion solution is included, and a chemical conversion coating having a coating withstand voltage of at least 200 V is formed on the aluminum electrode.
-
搜索结果
2 条记录 (耗时 0.012 秒)
