Developments of high-Bi alloys as a high temperature Pb-free solder

Cho, Junghyun; Mallampati, Sandeep; Schoeller, Harry; Yin, Liang; Shaddock, David

doi:10.1109/ectc.2014.6897464

Cited by 8 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Low-melting (138 °C) tin–bismuth eutectic is appreciated for low-temperature assemblies. Bi-based alloys are also candidates for lead-free high-temperature applications: BiAg, BiSbCu, and BiCuSn …”

Section: Introductionmentioning

confidence: 99%

“…Bi-based alloys are also candidates for lead-free high-temperature applications: BiAg, 11 BiSbCu, 10 and BiCuSn. 12 Numerous studies focused on the synthesis and the thermal decomposition of bismuth oxalates in the last decades. The thermolysis in air of Bi-containing mixed oxalates proved to be a promising chemical route for the preparation of high-T c superconducting oxides 13−15 and ferroelectric materials.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bi₂(C₂O₄)₃·7H₂O and Bi(C₂O₄)OH Oxalates Thermal Decomposition Revisited. Formation of Nanoparticles with a Lower Melting Point than Bulk Bismuth

et al. 2017

View full text Add to dashboard Cite

Two bismuth oxalates, namely, Bi(CO)·7HO and Bi(CO)OH, were studied in terms of synthesis, structural characterization, particle morphology, and thermal behavior under several atmospheres. The oxalate powders were produced by chemical precipitation from bismuth nitrate and oxalic acid solutions under controlled pH, then characterized by X-ray diffraction (XRD), temperature-dependent XRD, IR spectroscopy, scanning electron microscopy, and thermogravimetric differential thermal analyses. New results on the thermal decomposition of bismuth oxalates under inert or reducing atmospheres are provided. On heating in nitrogen, both studied compounds decompose into small bismuth particles. Thermal properties of the metallic products were investigated. The Bi(CO)OH decomposition leads to a Bi-BiO metal-oxide composite product in which bismuth is confined in a nanometric size, due to surface oxidation. The melting point of such bismuth particles is strongly related to their crystallite size. The nanometric bismuth melting has thus been evidenced ∼40 °C lower than for bulk bismuth. These results should contribute to the development of the oxalate precursor route for low-temperature soldering applications.

show abstract

Section: Introductionmentioning

confidence: 99%