| 摘要 |
PURPOSE:To minimize the variation of dimensions accompanied with actual sintering to improve the accuracy of dimensions after actual sintering by obtaining a half-sintered body by preliminary preparatory sintering at a temperature lower than the temperature of actual sintering and working the shape in this half-sintered state so that each part has prescribed dimensions. CONSTITUTION:A dielectric block 1a in the unsintered state which has a recessed groove 2 and through holes 3a and 3b is generated by press forming, extrusion, or the like. This block is preparatorily sintered at a preparatory sintering temperature T2, at which the dielectric block 1a is not sintered, lower than an actual sintering temperature T1 by DELTAT (=50 to 200 deg.C) to obtain a half-sintered body. The shape is so worked that each part has prescribed dimensions. After side holes 3c and 3d are formed in a dielectric block 1b in the half-sintered state by a drill, a complete sintered body is obtained by actual sintering at the actual sintering temperature T1. |
