The preparation of copper fine particle paste and its application as the inner electrode material of a multilayered ceramic capacitor

Yonezawa, Tetsu; Takeoka, Shinsuke; Kishi, Hiroshi; Ida, Kunio; Tomonari, Masanori

doi:10.1088/0957-4484/19/14/145706

Cited by 56 publications

(34 citation statements)

References 21 publications

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“…7,8 Metallic nanoparticles of copper attract attention not only in the scientific field but also in industry because of their application in electronic devices such as printed circuit boards [9][10][11] and multilayer ceramic capacitors. 12,13 Conventionally, copper/copper oxide nanoparticles have been produced by gas-phase and liquid-phase methods, however, both methods face great challenges. Gas-phase methods generate high-purity nanoparticles but they often require high temperatures using a chloride gases and a vacuum chamber.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of copper/copper oxide nanoparticles by solution plasma

Saito

Hosokai

Tsubota

et al. 2011

Journal of Applied Physics

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This paper describes the synthesis of copper/copper oxide nanoparticles via a solution plasma, in which the effect of the electrolyte and electrolysis time on the morphology of the products was mainly examined. In the experiments, a copper wire as a cathode was immersed in an electrolysis solution of a K 2 CO 3 with the concentration from 0.001 to 0.50 M or a citrate buffer (pH ¼ 4.8), and was melted by the local-concentration of current. The results demonstrated that by using the K 2 CO 3 solution, we obtained CuO nanoflowers with many sharp nanorods, the size of which decreased with decreasing the concentration of the solution. Spherical particles of copper with/ without pores formed when the citrate buffer was used. The pores in the copper nanoparticles appeared when the applied voltage changed from 105 V to 130 V, due to the dissolution of Cu 2 O.

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Section: Introductionmentioning

confidence: 99%

Synthesis of copper/copper oxide nanoparticles by solution plasma

Saito

Hosokai

Tsubota

et al. 2011

Journal of Applied Physics

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“…The Ag-rich alloy is preferred to maintain the high conductivity and control the costs. In contrast, base metal Ni is widely used in BaTiO 3 MLCCs [9]; however, Cu, as an internal electrode material, is still under investigation because of the technical challenges with material processing [12][13][14]. In this paper, we will review the development of the co-firing technology of three major piezoelectric material systems and demonstrate the recent progress in the base metal co-firing technology of lead-free piezoelectric materials.…”

Section: Trends Of Metal Electrodesmentioning

confidence: 99%

Base Metal Co-Fired Multilayer Piezoelectrics

et al. 2016

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Abstract:Piezoelectrics have been widely used in different kinds of applications, from the automobile industry to consumer electronics. The novel multilayer piezoelectrics, which are inspired by multilayer ceramic capacitors, not only minimize the size of the functional parts, but also maximize energy efficiency. Development of multilayer piezoelectric devices is at a significant crossroads on the way to achieving low costs, high efficiency, and excellent reliability. Concerning the costs of manufacturing multilayer piezoelectrics, the trend is to replace the costly noble metal internal electrodes with base metal materials. This paper discusses the materials development of metal co-firing and the progress of integrating current base metal chemistries. There are some significant considerations in metal co-firing multilayer piezoelectrics: retaining stoichiometry with volatile Pb and alkaline elements in ceramics, the selection of appropriate sintering agents to lower the sintering temperature with minimum impact on piezoelectric performance, and designing effective binder formulation for low pO 2 burnout to prevent oxidation of Ni and Cu base metal.

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“…Gold, silver, and copper nanoparticles can be applied to highly sensitive biosensors based on the localized surface plasmon resonance and surface-enhanced Raman spectroscopy [5][6][7]. Copper nanoparticles have also received much attention for their use in electroconductive pastes for wiring or thin electrodes [8] or for multilayered ceramic capacitors [9] because the sizing effect induces their melting point depression. On the other hand, those nanoparticles are potentially biotoxic because of their high reactivity.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Biodistribution and Biocompatibility of Gelatin-Coated Copper Nanoparticles and Naked Copper Oxide Nanoparticles

Abe

Iwadera

Narushima

et al. 2012

e-J. Surf. Sci. Nanotechnol.

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In this study, we investigated the biocompatibility of gelatin-coated copper nanoparticles. To estimate their cytotoxicity, the coated copper nanoparticles were exposed to osteoblastic cells. The cell proliferation remained above 80% even when the particles concentration increased. When uncoated copper oxide nanoparticles were exposed to the cells, the proliferation ratio rapidly decreased with the concentration reaching 20% under the same conditions. To determine their biodistribution, the nanoparticles were administered to mice through their tail veins. The particles were subsequently found in some organs using an energy-dispersed X-ray spectrometer and inductively coupled plasma-atomic emission spectroscopy. The polymer-coated nanoparticles were observed in the lung, liver and spleen. They were also detected in the urine at higher concentrations than the copper oxide nanoparticles. Thus, the polymer coating is expected to improve biocompatibility by virtue of the excellent cytocompatibility and acceleration of the excretion process.

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The preparation of copper fine particle paste and its application as the inner electrode material of a multilayered ceramic capacitor

Cited by 56 publications

References 21 publications

Synthesis of copper/copper oxide nanoparticles by solution plasma

Synthesis of copper/copper oxide nanoparticles by solution plasma

Base Metal Co-Fired Multilayer Piezoelectrics

Comparison of Biodistribution and Biocompatibility of Gelatin-Coated Copper Nanoparticles and Naked Copper Oxide Nanoparticles

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