Synthesis of Sn-3.5Ag Alloy Nanosolder by Chemical Reduction Method

Abstract

The synthesis of Sn-3.5Ag alloy nanosolder was investigated by chemical reduction method. In this method, chemical precipitation was achieved by using sodium NaBH<sub>4</sub> as a reducing agent and PVP (poly-m-vinyl 2- pyrrolidone) as a stabilizer. The experimental results obtained with different amounts of NaBH4 and PVP were compared. X-ray diffraction (XRD) patterns revealed that Ag<sub>3</sub>Sn was formed due to the successful alloying process. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) demonstrated a change in the morphology of Sn-3.5 Ag alloy nanosolder with increase in the PVP content in the bath. The size of the nanoparticles ranged from 300 to 700 nm. The nanosolder/nanoparticles were thus synthesized successfully under controlled and optimized chemical reduction process

Synthesis of Sn/Ag–Sn nanoparticles via room temperature galvanic reaction and diffusion

“…The use of Ag for coating Sn nanoparticles has always been reported at elevated temperature without any reducing agent or at room temperature in the presence of reducing agent or in solvents which possess reducing power, i.e., hexylamine, oleylamine and ethanol. 19,21,[26][27][28][29] The formation of the intermetallic compound between Ag and Sn has been achieved at room temperature without any reducing agent but it was carried out through vacuum evaporation of Sn on Ag thin lm. 23,24 Our observation demonstrated that intermetallic compounds were formed in the organic solvent under the galvanic reduction of the Ag cation by Sn at room temperature.…”

Key factors improving oxygen reduction reaction activity in cobalt nanoparticles modified carbon nanotubes

“…It is well known that PVP acts as a protecting agent of the colloidal particles preventing agglomeration. This has been manifested in different NPs composition like Pd nanoparticles and Sn-3.5Ag alloy NPs [29,38]. However, TEM images in Fig.…”

Studies of Preparation and Characteristics in Borosilicate Photosensitive Glass-Ceramics

“…Absorption which looks as a long wavelength tail of intrinsic absorption in a region down to 325 nm is the well-known absorption band of impurity of Fe 3+ [12]. This absorption band near 230 nm has a specific absorption in a soda-lime silicate glass of 3130 cm -1 /W% Fe 3+ [13]. No measurements of the specific absorption of iron were made for the glass but the number above can be used for rough estimations, which gives the total concentration of ferric ions of about 3 ppm.…”