| 摘要 |
An Fe-Ni alloy metal foil having excellent heat resilience and method for manufacturing the Fe-Ni alloy metal foil are provided. An aspect of the present invention provides an Fe-Ni alloy metal foil having excellent heat resilience, where the Fe-Ni alloy metal foil is prepared by an electroforming (EF) method and has a thickness of 100μm or less (except Ομπι), wherein the Fe-Ni alloy metal foil comprises, by wt%, Ni: 34-46%, a remainder of Fe and inevitable impurities, and wherein the Fe-Ni metal foil has a degree of heat resilience represented by formula 1 in an amount of 30ppm or less. [Mathematical formula 1] Degree of heat resilience = (L-L0)/L0, where L0 is the length of the metal foil (having a surface temperature of 30 °C ) before heat treatment, and L is the length of the metal foil after heat treatment and is defined as the length of the metal foil when the surface temperature is increased from 30 °C to 300 °C at a rate of 5 °C/min, maintained at 300 °C for five minutes, and then cooled to a surface temperature of 30 °C at a rate of 5 °C/min.) |
