Micro- and nano-spheres of low melting point metals and alloys, formed by ultrasonic cavitation

H. Friedman; S. Reich; R. Popovitz-Biro; P. Von Huth; I. Halevy; Y. Koltypin; A. Gedanken; Z. Porat

doi:10.1016/j.ultsonch.2012.08.009

Micro- and nano-spheres of low melting point metals and alloys, formed by ultrasonic cavitation

H. Friedman, S. Reich, R. Popovitz-Biro, P. Von Huth, I. Halevy, Y. Koltypin, A. Gedanken, Z. Porat

Department of Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Metals and alloys of low melting points (<430 °C) can be melted in hot silicone oil to form two immiscible liquids. Irradiation of the system with ultrasonic energy induces acoustic cavitation in the oil, which disperses the molten metals into microspheres that solidify rapidly upon cooling. This method has been applied to seven pure metals (Ga, In, Sn, Bi, Pb, Zn, Hg) and two eutectic alloys of gold (Au-Ge and Au-Si). The morphology and composition of the resulting microspheres were examined by SEM and EDS. Eutectic Au-Si formed also crystalline Au nanoparticles, which were separated and studied by HRTEM.

Original language	English
Pages (from-to)	432-444
Number of pages	13
Journal	Ultrasonics Sonochemistry
Volume	20
Issue number	1
DOIs	https://doi.org/10.1016/j.ultsonch.2012.08.009
State	Published - 1 Jan 2013

Keywords

Acoustic cavitation
Eutectic Au-Ge
Eutectic Au-Si
Metal microspheres
Nanospheres
Ultrasonic energy

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Environmental Chemistry
Radiology Nuclear Medicine and imaging
Acoustics and Ultrasonics
Organic Chemistry
Inorganic Chemistry

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10.1016/j.ultsonch.2012.08.009

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abstract = "Metals and alloys of low melting points (<430 °C) can be melted in hot silicone oil to form two immiscible liquids. Irradiation of the system with ultrasonic energy induces acoustic cavitation in the oil, which disperses the molten metals into microspheres that solidify rapidly upon cooling. This method has been applied to seven pure metals (Ga, In, Sn, Bi, Pb, Zn, Hg) and two eutectic alloys of gold (Au-Ge and Au-Si). The morphology and composition of the resulting microspheres were examined by SEM and EDS. Eutectic Au-Si formed also crystalline Au nanoparticles, which were separated and studied by HRTEM.",

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AU - Reich, S.

AU - Popovitz-Biro, R.

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AU - Halevy, I.

AU - Koltypin, Y.

AU - Gedanken, A.

AU - Porat, Z.

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AB - Metals and alloys of low melting points (<430 °C) can be melted in hot silicone oil to form two immiscible liquids. Irradiation of the system with ultrasonic energy induces acoustic cavitation in the oil, which disperses the molten metals into microspheres that solidify rapidly upon cooling. This method has been applied to seven pure metals (Ga, In, Sn, Bi, Pb, Zn, Hg) and two eutectic alloys of gold (Au-Ge and Au-Si). The morphology and composition of the resulting microspheres were examined by SEM and EDS. Eutectic Au-Si formed also crystalline Au nanoparticles, which were separated and studied by HRTEM.

KW - Acoustic cavitation

KW - Eutectic Au-Ge

KW - Eutectic Au-Si

KW - Metal microspheres

KW - Nanospheres

KW - Ultrasonic energy

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Micro- and nano-spheres of low melting point metals and alloys, formed by ultrasonic cavitation

Abstract

Keywords

ASJC Scopus subject areas

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