Synthesis and melting behaviour of Bi, Sn and Sn-Bi nanostructured alloy

被引：53

作者：

Frongia, F. ^{[1
,2
]}

Pilloni, M. ^{[1
,2
]}

Scano, A. ^{[1
,2
]}

Ardu, A. ^{[1
,2
]}

Cannas, C. ^{[1
,2
]}

Musinu, A. ^{[1
,2
]}

Borzone, G. ^{[3
,4
]}

Delsante, S. ^{[3
,4
]}

Novakovic, R. ^{[5
]}

Ennas, G. ^{[1
,2
]}

机构：

[1] Univ Cagliari, Dipartimento Sci Chim & Geol, I-09042 Monserrato, CA, Italy

[2] Natl Consortium Mat Sci & Technol INSTM, Cagliari Res Unit, I-09042 Monserrato, CA, Italy

[3] Univ Genoa, Dept Chem & Ind Chem, I-16146 Genoa, Italy

[4] Natl Consortium Mat Sci & Technol INSTM, Genoa Res Unit, I-16146 Genoa, Italy

[5] CNR, Inst Energet & Interphases IENI, I-16149 Genoa, Italy

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 623卷

关键词：

Bi-Sn alloy; Nanoparticles; One-pot synthesis; Borohydride reducing agent; Melting temperature depression; LEAD-FREE SOLDERS; SMALL PARTICLES; NANOCALORIMETRIC MEASUREMENTS; CHEMICAL-REDUCTION; SIZE DEPENDENCE; NANOPARTICLES; POINT; TIN; BOROHYDRIDE; TEMPERATURE;

D O I：

10.1016/j.jallcom.2014.08.122

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lead-free solders based on Bi-Sn bimetallic nanoclusters with eutectic composition (Bi43Sn57) were synthesized at low temperature by simultaneous reduction reaction from aqueous solution containing bismuth and tin chlorides, using potassium borohydride as a reducing agent. By the same processing route, pure bismuth and tin nanoparticles have also been prepared. Microstructure, morphology and composition of the samples were characterized by X-ray powder diffraction (XRD), transmission (TEM) and scanning electron microscopy (SEM). TEM images of Bi-Sn nanoparticles show average size ranging from 30 to 100 nm. Thermal behaviour of Bi-Sn nanopowders was studied by DSC (differential scanning calorimetry) and a melting temperature (135 degrees C) lower than that of the corresponding microcrystalline sample (139 degrees C) was observed. SEM micrographs of the thermally treated sample up to 400 degrees C show fine spherical grains in the micrometer range with finer powder particles on the surface. XRD powder diffraction analysis indicates the formation of bismuth and tin nanophases with an average particle size of 85 and 126 nm, respectively. The oxidation behaviour of the samples was also investigated. The results obtained have been analyzed in view of theoretical models describing the melting temperature depression of nanoparticles. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：7 / 14

页数：8

共 41 条

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