Production of Amorphous Soft Magnetic Powders by the New Water Atomization Process "SWAP".

Endo, Isao; Okuno, R.; Satake, Hideki; Otsuka, Isamu; Yamamoto, Hiroshi; Shintani, A.; Yoshino, M.; Yagi, M.

doi:10.2497/jjspm.48.697

Cited by 7 publications

(1 citation statement)

References 2 publications

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“…In this method, high pressure water breaks up a molten metal stream, which then solidifies into the metal powder. It has been reported [11][12][13][14][15] that uniform and smaller metal powders were formed by controlling conditions such as nozzle type, pressure and water flow rate. So far, the metal powders described above have been produced by atomization under an air atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Silver Powder Produced through Water Atomization and RF Plasma Treatment

Arita¹,

Ogihara²,

Kubo³

et al. 2017

Int J Metall Mater Eng

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Silver powder was produced through water atomization with a pressure of 80 MPa and a flow rate of 220 L/min. Scanning electron microscopy analysis showed that as-prepared silver particles were aggregated and had various types of morphologies such as spherical, spheroidal and irregular. The volume average particle size of as-prepared silver powder was 7.7 μm at the drain rate of 0.024 kg/s. The particle size decreased with decreasing the drain rate. Powder X-ray diffraction revealed that the silver powder with a single phase and high crystallinity was formed. Surface treatment of silver powders classified to 5 μm was performed at 10,000°C by radio-frequency (RF) plasma under argon atmosphere. RF plasma treatment led to the formation of spherical particles from irregular particles. The crystallinity and crystallite of silver powder were increased by RF plasma treatment. X-ray photoelectron spectroscopy showed that the oxygen content in silver particles decreased from 500 ppm to 45 ppm. Thermomechanical analysis revealed that the shrinkage of silver powder reduced by the RF plasma treatment. It was clear that the particle characterization of silver powder was significantly modified by RF plasma treatment. The specific resistivity of silver paste sintered at 900°C exhibited 1.89×10 -8 Ωm.

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Section: Introductionmentioning

confidence: 99%

Characterization of Silver Powder Produced through Water Atomization and RF Plasma Treatment

Arita¹,

Ogihara²,

Kubo³

et al. 2017

Int J Metall Mater Eng

View full text Add to dashboard Cite

show abstract

Production and characterization of silver powder created using high-pressure water atomization

Ogihara

Kubo

Arita

et al. 2017

J. Ceram. Soc. Japan

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Silver powders are important for the production of silicon solar cells and low-temperature co-fired ceramics. In this study, a silver powder was produced at a rate of 2 kg/min through water atomization with a water pressure of 80 MPa and water flow rate of 220 L/min. Scanning electron microscopy analysis showed that the silver particles produced were aggregated and had various types of morphologies such as spherical, elliptical, and irregular. The volume average particle size and its standard deviation were 8 and 4.1¯m, respectively. Powder X-ray diffraction revealed that the as-prepared silver powder had a single phase with high crystallinity. The oxygen content in the silver powder measured by electron probe micro analysis was 50 ppm. The silver powder was classified to the size of¯2.5¯m, and the shrinkage of the silver paste was 25.5% at 900°C, comparable to that of the powder obtained by chemical reduction. Electrical measurements revealed that the specific resistivity of the silver paste sintered at 900°C for 60 min was 2.11 © 10 ¹8 ³ m. The silver paste exhibited lower specific resistivity when the sintering temperature was high and sintering time was long.

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Development and Research of High-Performance Amorphous and Nanocrystalline Powders for Surface Mounted Devices

Yu¹,

Zhang²,

Li³

et al. 2022

SSRN Journal

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Production of Amorphous Soft Magnetic Powders by the New Water Atomization Process "SWAP".

Cited by 7 publications

References 2 publications

Characterization of Silver Powder Produced through Water Atomization and RF Plasma Treatment

Characterization of Silver Powder Produced through Water Atomization and RF Plasma Treatment

Production and characterization of silver powder created using high-pressure water atomization

Development and Research of High-Performance Amorphous and Nanocrystalline Powders for Surface Mounted Devices

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