| 摘要 |
PROBLEM TO BE SOLVED: To suppress reduction of electrolyte conductivity and raises spark voltage by adding a swelling F mica grain in a specified grain size range to an electrolyte composed of a solvent and salute. SOLUTION: A swelling F mica grain in a grain size range of 1 nm-10μm is added to an electrolyte composed of a non-protic solvent such asβ- orγ- butyloluctone andγ-valeroluctone, or protic solvent such as ethylene glycol, ethylene glycol monoalkylether and ethylene glycol dialkylether, and a solute of aromatic carboxylic acid such as phthalic acid, benzoic acid, salicylic acid and resorcylic acid, aliphatic carboxylic acid such as maleic acid, citraconic acid and fumaric acid. This suppresses the reduction of the electrolyte conductivity and raises the spark voltage.
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