Synthesis and characterization of Ni@TiO2 nanocapsules for RF-MLCC electrodes via DC arc plasma method.

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Title: Synthesis and characterization of Ni@TiO2 nanocapsules for RF-MLCC electrodes via DC arc plasma method.
Authors: Li, Xi-Yang1 (AUTHOR), Wei, Guang-Long1 (AUTHOR), Shen, Nai-Rui1 (AUTHOR), Wang, Yi-Long1 (AUTHOR), Dong, Xing-Long1 (AUTHOR) dongxl@dlut.edu.cn, Jung, Youngguan2 (AUTHOR)
Source: Materials Science & Engineering: B. Jan2025, Vol. 311, pN.PAG-N.PAG. 1p.
Subjects: Ceramic capacitors, Plasma arcs, Titanium dioxide, Nitrogen plasmas, Quality factor, Nanocapsules
Abstract: [Display omitted] • Ni@TiO 2 nanocapsules made by DC arc plasma in N 2 , forming core–shell structures. • TiO 2 coat on Ni nanoparticles raised oxidation resistance, start temp up ∼ 50 °C. • Improved sintering seen; 30 wt% TiO 2 samples reached 5.3% shrinkage rate. • Better high-frequency performance and Q value make Ni@TiO 2 nanocapsules a promising material for RF-MLCC internal electrodes. Ni@TiO 2 core–shell nanocapsules (NCs) were synthesized in-situ using a DC arc plasma in a nitrogen atmosphere. Compared to bare Ni nanoparticles, the coated Ni@TiO 2 nanocapsules exhibit enhanced oxidation resistance, thermal stability, delayed initial sintering temperature, and controllable thermal expansion. The sample with 30 wt% TiO 2 addition shows an onset oxidation temperature of 251.9 °C and a sintering shrinkage of 5.4 % at 1200 °C. The TiO 2 shell demonstrates high compatibility with the Ni core and an excellent quality factor (Q), with the 5 wt% TiO 2 addition sample achieving a maximum Q value of 16.5 at 12.3 GHz. Additionally, the DC arc method enables the in-situ preparation of Ni@TiO 2 NCs under a nitrogen atmosphere, making it suitable for large-scale industrial production. Thus, Ni@TiO 2 NCs present a promising material for next-generation radio-frequency multilayer ceramic capacitors (RF-MLCCs). [ABSTRACT FROM AUTHOR]
Copyright of Materials Science & Engineering: B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Synthesis and characterization of Ni@TiO2 nanocapsules for RF-MLCC electrodes via DC arc plasma method.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Xi-Yang%22">Li, Xi-Yang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Guang-Long%22">Wei, Guang-Long</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shen%2C+Nai-Rui%22">Shen, Nai-Rui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yi-Long%22">Wang, Yi-Long</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Xing-Long%22">Dong, Xing-Long</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dongxl@dlut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Jung%2C+Youngguan%22">Jung, Youngguan</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+B%22">Materials Science & Engineering: B</searchLink>. Jan2025, Vol. 311, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Ceramic+capacitors%22">Ceramic capacitors</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+arcs%22">Plasma arcs</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen+plasmas%22">Nitrogen plasmas</searchLink><br /><searchLink fieldCode="DE" term="%22Quality+factor%22">Quality factor</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocapsules%22">Nanocapsules</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: [Display omitted] • Ni@TiO 2 nanocapsules made by DC arc plasma in N 2 , forming core–shell structures. • TiO 2 coat on Ni nanoparticles raised oxidation resistance, start temp up ∼ 50 °C. • Improved sintering seen; 30 wt% TiO 2 samples reached 5.3% shrinkage rate. • Better high-frequency performance and Q value make Ni@TiO 2 nanocapsules a promising material for RF-MLCC internal electrodes. Ni@TiO 2 core–shell nanocapsules (NCs) were synthesized in-situ using a DC arc plasma in a nitrogen atmosphere. Compared to bare Ni nanoparticles, the coated Ni@TiO 2 nanocapsules exhibit enhanced oxidation resistance, thermal stability, delayed initial sintering temperature, and controllable thermal expansion. The sample with 30 wt% TiO 2 addition shows an onset oxidation temperature of 251.9 °C and a sintering shrinkage of 5.4 % at 1200 °C. The TiO 2 shell demonstrates high compatibility with the Ni core and an excellent quality factor (Q), with the 5 wt% TiO 2 addition sample achieving a maximum Q value of 16.5 at 12.3 GHz. Additionally, the DC arc method enables the in-situ preparation of Ni@TiO 2 NCs under a nitrogen atmosphere, making it suitable for large-scale industrial production. Thus, Ni@TiO 2 NCs present a promising material for next-generation radio-frequency multilayer ceramic capacitors (RF-MLCCs). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science & Engineering: B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.mseb.2024.117861
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Plasma arcs
        Type: general
      – SubjectFull: Titanium dioxide
        Type: general
      – SubjectFull: Nitrogen plasmas
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      – SubjectFull: Quality factor
        Type: general
      – SubjectFull: Nanocapsules
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    Titles:
      – TitleFull: Synthesis and characterization of Ni@TiO2 nanocapsules for RF-MLCC electrodes via DC arc plasma method.
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            NameFull: Li, Xi-Yang
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            NameFull: Wei, Guang-Long
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            NameFull: Shen, Nai-Rui
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            NameFull: Wang, Yi-Long
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            – D: 01
              M: 01
              Text: Jan2025
              Type: published
              Y: 2025
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