P03 超音波の物理的作用を利用したSn-Biナノソルダー合成

抄録

Nanoparticle alloy which has different redox potential is impossible to synthesize by conventional method, liquid phase reduction. In this study, physical ultrasound effect was focused for synthesis of nanoparticle alloy, and ultrasound effect at the solid-liquid system was investigated.
300 ml methanol and 10.00 g Sn-Bi solder powder were added to 1000 ml beaker and irradiate by ultrasound for 6-24 h (ultrasound condition:1200 W, 28 KHz:75 KHz=50 %:50 %). After ultrasound irradiation, solution was separated the supernatant and the residue by decantation. By ultrasound irradiation, corrosion of starting material surface were observed and it increased with long-time irradiation. It is considered that hotspot and micro jet were occurred by ultrasound irradiation in solid-liquid system, and it promoted corrosion of Sn-Bi particle surface. It found that corroded Sn-Bi by ultrasound effect was nano-size, it was dispersed in methanol as a result.