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

被引：53

作者：

Friedman, H. ^{[2
]}

Reich, S. ^{[2
]}

Popovitz-Biro, R. ^{[3
]}

von Huth, P. ^{[3
]}

Halevy, I. ^{[4
]}

Koltypin, Y. ^{[5
]}

Gedanken, A. ^{[5
]}

Porat, Z. ^{[1
,6
]}

机构：

[1] Ben Gurion Univ Negev, Dept Biomed Engn, IL-84105 Beer Sheva, Israel

[2] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel

[3] Weizmann Inst Sci, Dept Chem Res Support, IL-76100 Rehovot, Israel

[4] Nucl Res Ctr Negev, Div Phys, IL-84965 Beer Sheva, Israel

[5] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

[6] Nucl Res Ctr Negev, Div Chem, IL-84965 Beer Sheva, Israel

来源：

ULTRASONICS SONOCHEMISTRY | 2013年 / 20卷 / 01期

关键词：

Acoustic cavitation; Ultrasonic energy; Metal microspheres; Nanospheres; Eutectic Au-Ge; Eutectic Au-Si; HIGH-SPEED PHOTOGRAPHY; ACOUSTIC EMULSIFICATION; SONOCHEMICAL SYNTHESIS; NANOPARTICLES;

D O I：

10.1016/j.ultsonch.2012.08.009

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Metals and alloys of low melting points (<430 degrees 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. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：432 / 444

页数：13

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