Patent ID: 6103319
Filing Date: 2000-08-15
Classification: B22F,H01M,Y02E,Y10T

Abstract:
mu.m in an average particle size with a binder resin and a diluent selected from the group consisting of water and an organic solvent to prepare a slurry in such a way that the residual carbon rate of the binder resin and the blending proportion of the binder resin to the iron oxide satisfy the relationship of the following formula; applying the slurry on a porous resin core body and then drying the same; thereafter effecting a heat treatment in an atmosphere of an inert gas at a temperature of 900.degree. C. to 1,250.degree. C. to carbonize the binder resin while reduction-sintering iron oxide with the resulting carbonization product; thereafter effecting a heat treatment for reduction-sintering the nonreduced part of iron oxide in a reducing atmosphere at a temperature of 900.degree. C. to 1,350.degree. C. to remove the binder resin while simultaneously sintering Fe to obtain a porous Fe body having a carbon content of at most 0.2% and a porosity of at least 90%; and then covering the surface of the Fe skeletal portion thereof with Ni by Ni electroplating:3<a.times.b<11a: residual carbon rate % of binder resin, provided that a>30b: amount of the binder resin blended/amount of iron oxide blended.