PRODUCTION METHOD FOR ALUMINUM FOIL FOR ELECTROLYTIC CAPACITOR ELECTRODE

Japanese Patent JP3765077

B2

PROBLEM TO BE SOLVED: To provide a production method for aluminum foil for an electrolytic capacitor electrode in order for obtaining an electrode foil for an electrolytic capacitor with a high electrostatic capacity.
SOLUTION: Aluminum foil (coil) is put in an annealing oven. Before the step of raising the inside temperature of the annealing oven to a specified value, air is exhausted from the annealing oven to reduce the inside pressure to 50 Pa or lower and an inert gas such as a nitrogen gas, an argon gas, or a helium gas is introduced into the oven. The amount of the inert gas introduced is set so that the inside pressure reaches the atmospheric pressure or higher. Then, the temperature-raising step is started. After starting the temperature-raising step and before ending the step, the inert gas in the oven is replaced with a reducing gas containing at least 10 vol.% hydrogen gas. The amount of the reducing gas is also set so that the inside pressure reaches the atmospheric pressure or higher. After the completion of the temperature-raising step, the aluminum foil is subjected to a holding step, a cooling step, and the final annealing step, thus giving the aluminum foil for an electrolytic capacitor electrode.

Kenji Yamamoto
Akihiro Yamaguchi
Tsugio Kataoka

JP2001326855A

April 12, 2006

October 24, 2001

Click for automatic bibliography generation  

Nippon Foil Co., Ltd.

C22F1/04; C22F1/00; C22F1/02; H01G9/00; H01G9/055; (IPC1-7): C22F1/04; C22F1/02; H01G9/00; H01G9/055; //C22F1/00

JP2000204456A
JP2000204455A
JP8222488A
JP64025956A
JP2002008953A
JP2000297337A
JP8100233A

Shigeki Okumura

Previous Patent: METHOD AND APPARATUS FOR ELECTROLYSIS

Next Patent: WALL-MOUNTING STRUCTURE FOR WALL-MOUNTED APPARATUS