| 摘要 |
PURPOSE:To attain a minute carbon electrode and a manufacturing method thereof which can suppress a blank current of the electrode and secure excellent insulation even when it is used in various systems, by a method wherein a prescribed composition dispersed and made composite in a high degree is extruded to be shaped in a thin wire and then baked in a high temperature in an inactive atmosphere. CONSTITUTION:A green thin wire is obtained by the following method. Crystalline fine carbon powder is selected appropriately and compounded with a natural macromolecular substance or the like and used as an organic binder and powder dispersion is conducted sufficiently. Thereafter a plasticizer or the like is added to the powder as occasion demands, and the powder is mixed and dispersed sufficiently by using a kneader which can apply a shearing force in a high degree. After the powder thus prepared is pelletized by a pelletized by a pelletizer, it is extruded to be of a desired diameter by a screw-type extrusion machine. A thin wire thus prepared is fixed on a support frame so that the straightness thereof be maintained, and it is treated in an air oven to be made into a carbon precursor wire material. Moreover, carbonization is completed by gradual heating at a temperature of 500 to 1500 deg.C in a nitrogen gas, with the rising speed of the temperature controlled, and thereby a thin carbon wire for a minute electrode is obtained. The thin carbon obtained in this way is impregnated and coated with an insulator and thereby the minute electrode is manufactured. |
