摘要
采用浸渍银浆中平均粒径2-5μm的银粉，通过紫外可见光谱（UV—vis）和Zeta电位测量，最终确定银浆最大的等离子体吸收波长值为320nm，Zeta电位等电点为pH=7．95。在此基础上详细讨论了溶剂pH值及表面活性剂种类及浓度等因素对浸渍银浆分散稳定性的影响，并探究其分散机理。运用分光光度计和SEM，分析了银粉在浆料中的分散稳定性和微观组织形貌。结果表明：银浆的pH值在7-10范围分散稳定性较高，非离子表面活性剂和阴离子表明活性剂能够提高银浆的分散稳定性。
Grain size of silver particles were 2 - 5μm. The data of UV-vis confirmed that the maximum absorption wavelength of sliver suspension was 320 nm and the Zeta potential showed that the isoelectric point was 7. 95. According to the dependence of the absorbance spectrum intensity, the influences of pH and dispersants were investigated. Spectrophotometer and scanning electron microscope （SEM） was used to characterize and analyze the stability of sliver suspension and particle size distribution and structure of sliver particles respectively. The results showed that pH was 7 - 10, nonionic, anionic surfactants were heloful to keep size stability nof silver suspension.
出处
《广州化工》
CAS
2016年第19期45-47,54,共4页
GuangZhou Chemical Industry
基金
国家自然科学基金(51362004)
黔科合重大专项字[2014]6014高频片式电子元器件关键技术研究与产业化
关键词
浸渍银浆
银粉
表面活性剂
分散
sliver suspension
silver powders
surfactants
dispersion
