Method of manufacturing nickel powder, apparatus for manufacturing nickel powder, and crucible for manufacturing nickel powder

Abstract

Provided is a method and apparatus for producing nickel powder with which in the case of melting and vaporizing nickel raw material charged into a crucible with plasma to obtain the nickel powder, the deterioration in the characteristic of electronic parts can be prevented. The nickel in the crucible 2 set in a plasma reaction furnace 1, is melted and vaporized and cooled to obtain the nickel powder with a grain collecting device 12. At least a portion in contact with the nickel on the surface layer in the crucible 2 or the whole body, is covered with a coating layer. In the coating layer, a material composed of a component used for the electronic parts using the nickel powder for electrode or the material composed mainly of this component, is used. Further, the whole crucible is manufactured with the material composed of the component used for electronic parts using the nickel powder for electrode of the material composed mainly of the component. The inner wall or the whole body in the reaction furnace 1 uses the above material, too.

Description

technical field [0001] The present invention relates to a method for producing nickel powder used in electrodes of electronic devices, a device for producing nickel powder, and a crucible for producing nickel powder. Background technique [0002] In recent years, electronic devices such as capacitors have become increasingly thinner and larger in capacity. Correspondingly, ceramic dielectric layers have also tended to be thinner, and the number of electrodes has also tended to increase. In addition, along with the thinning of the dielectric layer, the thinning of the electrode layer is also realized. Specifically, a capacitor having a thickness of a dielectric layer of 2 μm or less and an electrode layer of 1 μm or less has been realized. Moreover, as a material of an electrode, it tends to use inexpensive nickel instead of silver or a silver-palladium alloy (for example, refer patent document 1). When this nickel is used for an electrode, a conductor paste containing nick...

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Problems solved by technology

[0008] The present inventors have found that when nickel powder mixed with such impurities is used as a conductor paste for forming electrodes of electronic devices, it affects the composition of materials for electronic devices such as capacitors and affects the characteristics of capacitors.

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