电沉积过程中纳米粒子温度变化规律研究

Study on Temperature Changing of Nano-particles on the Eletroplating

建立了考虑到热交换和质量交换情况下,电沉积过程中纳米粒子热力学函数满足的方程.探讨了电镀生长、动力学生长和扩散生长这3种生长机制情况下,粒子温度随粒子线度的变化规律.结果表明:小岛生长开始时,小岛温度随粒径增大而急剧升高;当小岛半径增大到开初的1.05倍时,温度缓慢降低;其中动力学生长降温最慢,而电镀生长降温最快.增大电流密度和电解液浓度不会改变小岛温度随粒径的变化情况,但会使温度有所升高.

The equation satisfied with the thermodynamic function of nanoparticles is found when heat transfer and mass-exchange play an important role on the electroplating. The variation of nanoparticles＇s temperature with nanocrystalline, current density, and electrolyte mass concentration on the electroplating, kinetics and diffusion growth. It finds that theisland＇s temperature increases rapidly at the first stage of island growth when these electroplating, but the temperature decreases slowly when radius increases to 1.05 times, while the decrease of temperature on the kinetics growth is the most slow and the most rapidly on electroplating. It is the same to the variation of temperature when current density and electrolyte mass concentration increase, but the temperature is higher.