【摘要】 利用电场诱导热转印技术,通过电场诱导热扩散和后续热处理分别在硅酸盐玻璃内部获得了银离子与银纳米晶图形。借助XPS、FT-IR、UV-vis研究了银的扩散、析晶机制。结果发现,在直流电场作用下,图形膜中金属银通过电化学反应被氧化为银离子,并沿电力线扩散进入玻璃基体,分别以Ag+和Ag0形式占据Na+空位和填充到玻璃网络间隙。后续热处理过程中部分Ag+还原为Ag0,银离子通过扩散、成核、析晶为银纳米晶。EPA和HRTEM等分析表明,玻璃内部获得的金属银离子及银纳米晶图形清晰,银含量最高可达24.5%(质量分数),扩散深度>200μm,银纳米晶体呈面心立方结构,直径为7～15nm。更多还原

【Abstract】 With direct current electric field induced diffusion under high temperature,silver ions from patterned silver layer on silicate glass surface diffused into the substrate.After the sample was re-annealed in air,silver nano-crystalline pattern was obtained in the glass sheet.The diffusion and crystallization mechanism of silver ions were studied by XPS,FT-IR and UV-vis analysis.The results show that the electrochemical reaction of patterned silver layer on glass surface occurred under the direct electric field,and silver was oxidized as silver irons.These silver ions entered the glass substrate along the electric filed lines,and partly took up the vacancy left by the as migrated sodium ions.The other silver ions mostly gain electron from electric filed and were deoxidized as Ag0,which were filled in the glass network.During the re-annealing process,silver ions were deoxidized as Ag0 and Ag++.They were then crystallized as silver nano-crystals.The results of EPA and HRTEM show that both silver ion patterns and silver nano-crystal patterns prepared by this process are sharp-edged,the content and diffusion depth of silver in the glass is up to 24.5wt% and beyond 200μm beneath the anode,and the silver nano-crystals was face centered cubic structure and in size of 7-15nm.更多还原