Electric joining method of material including ceramics

PCT No. PCT/JP91/01322 Sec. 371 Date Jun. 3, 1992 Sec. 102(e) Date Jun. 3, 1992 PCT Filed Oct. 2, 1991 PCT Pub. No. WO92/06054 PCT Pub. Date Apr. 16, 1992.The present invention provides an electric joining method of a body to be jointed including the butted portion of at least between electroconductive ceramics to be jointed or between an electroconductive ceramics and a metal to be jointed, whereby the body to be jointed is electrically jointed while the thermal stress generated at the ceramics materials to be jointed is eased. In the electric joining method according to the present invention, at least a pair of electrodes are brought to butt against the materials to be jointed holding at least one or more butted portions therebetween, with a joining agent interposed at the butted portions. Moreover, there provided are a first heating means for heating the materials to be jointed between the electrodes by Joule heat through impression of a voltage between the electrodes and, a second heating means for heating a part of said materials to be jointed and its vicinity where a large temperature gradient is formed only by the first heating means. The temperature of the butted portion is raised to a desired joining temperature while both the first and the second heating means are used together so that the thermal stress generated because of the temperature gradient at the materials to be jointed becomes smaller than the breaking stress of the materials to be jointed.