Surface quality of nickel foil:

(1) The surface of the nickel foil should be smooth and clean, and there should be no wind layer, cracks, bubbles, pricking, folding and inclusion;

(2) Slight local defects such as scratches, spots, pits, pressings and roll marks that do not make the thickness of the strip exceed the allowable deviation are allowed; slight oxidation color, dimming and slight local oil stains are not used as the basis for scrap;

(3) Both sides of the strip should be cut neatly, without burr, split edge and curling edge.

(4) The strip should be straight, but slight waves are allowed; The side bending of the strip shall not be greater than 3 mm per meter.

1. With weldability, high conductivity, appropriate linear expansion coefficient

2. Good strength at high temperature, low resistivity

3. Nickel foil requires high melting point, corrosion resistance, good mechanical properties, good pressure processing in hot and cold state, easy to degassing, suitable for radio, electric light source, mechanical manufacturing, chemical industry, is an important structural material in vacuum electronic devices.