Effect of Particle Size on Electrode Paste Properties and Sintering Properties of Ni Powder Synthesized by Wet Chemical Process.

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  • 湿式化学法で合成したＮｉ粉末の粒径が電極ペースト特性と焼結特性に及ぼす影響
  • テクニカルレポート シッシキ カガクホウ デ ゴウセイ シタ Ni フンマツ ノ リュウケイ ガ デンキョク ペースト トクセイ ト ショウケツ トクセイ ニ オヨボス エイキョウ

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Abstract

We evaluated the characteristics of Ni powder paste used for the fabrication of internal electrodes of multilayer ceramic chip capacitors (MLCs). Moreover the effect of the grain size of Ni powder on sintering characteristics was evaluated using the paste. High filling densities were obtained for Ni powder of two different grain sizes, 0.2 and 0.5μm. The experimental result reversed that pulverized Ni powder exhibits a high level of dispersion when it is used in paste form. From the measurements of sintering shrinkage rate, it has been observed that the 0.2μm Ni powder had a higher shrinkage rate than the 0.5μm Ni powder, indicated that the sintering shrinkage rate is closely related to grain diameter. A similar result has been obtained by observation of the surface structure of sintered bodies.

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