| 摘要 |
1,157,123. Capacitors. CORNING GLASS WORKS. 13 Sept., 1966 [22 Sept., 1965], No. 40921/66. Heading H1M. Capacitors are manufactured by arranging interleaved conducting strips 18, 20 and vitreous glass ceramic strips 12, 14, 16 between thermal insulating layers 22, 24, compressing the arrangement by means of platens 26 while it is heated to the softening temperature of the glass ceramic but below the devitrifying temperature so as to fuse the glass ceramic layers together and embed the conducting layers therein, then heating to a temperature sufficient to devitrify the glass ceramic, cooling the assembly to room temperature after devitrification is complete, removing the pressure, thermal insulation and platens and severing individual capacitors from the fused stacks. Usually the method is applied to the manufacture of multilayer capacitors, the laminations being held together by means of a jig or by an adhesive such as biphenyl which will be removed by volatilization in subsequent operations. Layers 22, 24 may be mica and asbestos respectively, and platens 26 steel or refractory material. One glass ceramic composition comprises niobium pentoxide, lead oxide, barium oxide, strontium oxide, silica, alumina, boron trioxide and cuprous oxides, but other oxygen octahedra-type ferroelectric materials containing a glass-forming oxide may be used. |
