Silver electrolyte for depositing dispersion silver layers and contact surfaces with dispersion silver layers

A silver electrolyte, consisting of:

• a) potassium silver cyanide with a content of at least 50 g/L,
• b) potassium cyanide with a content of at least 120 g/L,
• c) at least one grain refiner with a content of 0.2 to 10 g/L,
• d) at least one dispersant with a content of 1 to 10 g/L,
• e) at least one solid component with a content of 1 to 150 g/L, and
• f) a brightener, and
• g) one or more solvents;
• wherein particles of the solid component have an average particle size (d50) of 10 nm-100 μm;
• wherein the at least one grain refiner is selected from naphthalene sulphonic acid, naphthalene sulphonic acid derivatives or mixtures thereof;
• wherein the dispersant is 2-ethylhexyl sulfate;
• and
• wherein the at least one solid component is graphite.

A silver electrolyte, comprising:

• a) potassium silver cyanide with a content of at least 50 g/L,
• b) potassium cyanide with a content of at least 120 g/L,
• c) at least one grain refiner with a content of 0.2 to 10 g/L,
• d) at least one dispersant with a content of 1 to 10 g/L,
• e) at least one solid component with a content of 1 to 150 g/L, and
• f) a brightener, and
• g) one or more solvents;
• wherein particles of the solid component have an average particle size (d50) of 10 nm-100 μm;
• wherein the at least one grain refiner is selected from naphthalene sulphonic acid, naphthalene sulphonic acid derivatives or mixtures thereof;
• wherein the dispersant is 2-ethylhexyl sulfate;
• and
• wherein the at least one solid component is graphite.