In-situ preparation of Ni@ZrO<sub>2</sub> nanocapsules powder by DC arc plasma for internal electrode of MLCC
- Authors
- Li, Xi-Yang; Qu, Xing-Hao; Liu, Dong; Zhu, Guang-Yun; Dong, Xing-Long; Jung, Youngguan
- Issue Date
- Jun-2024
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- VACUUM, v.224
- Journal Title
- VACUUM
- Volume
- 224
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/28683
- DOI
- 10.1016/j.vacuum.2024.113130
- ISSN
- 0042-207X
1879-2715
- Abstract
- Zirconium oxide-coated Ni nanocapsules (Ni@ZrO2 NCs) were in-situ fabricated by DC arc plasma in a nitrogen atmosphere. The co-evaporation of a target mixture consisting of coarse ZrO2 and Ni powders resulted in the formation of Ni@ZrO2 core-shell nanocomposites (NCs). The high energy states of excited ions (Ni3+, Zr4+, O2-, N2+, etc.) within the arc plasma region were recorded in real time by online optical emission spectroscopy (OES), which becomes visible evidences of the energy conditions for the fabrication of Ni@ZrO2 NCs. These nanocapsules underwent preferential formation of zirconium oxide species based on the oxygen potential rule, followed by the nucleation and subsequent growth processes. The Ni@ZrO2 NCs exhibited improved oxidation resistance, with an onset temperature for sintering approximately 40 degrees C higher than that of pristine Ni nanoparticles (NPs). Additionally, these NCs displayed an appropriate shrinkage rate, with a volume change of about 7.1% at 1200 degrees C. The symbiotic relationship between the ZrO2 shell and the Ni core within each nanoparticle suggests enhanced interfacial stability, rendering these NCs a promising material for the advancement of multilayer ceramic capacitors (MLCCs).
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Collections - Department of Mechanical Engineering > 1. Journal Articles
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