摘要
为实现微硅粉的高值化应用,充分利用微硅粉中的硅、镁、钙等微量元素。实验以六偏磷酸钠为分散剂,黄原胶为稳定剂,通过单因素实验以及三因素三水平正交实验确定出微硅粉悬浮液体地膜配方以及制备工艺,采用沉降实验对不同温度、酸碱、盐体系的悬浮液的稳定性进行分析,借助流变仪、激光粒度分析仪分析流变特性、微硅粉分散性。结果表明:黄原胶、微硅粉、六偏磷酸钠添加量分别为0. 15wt%、0. 5wt%,0. 5wt%时,可得到稳定分散的微硅粉液体地膜悬浮液,悬浮液的最佳保温温度为10～30℃,保证微硅粉悬浮液体地膜悬浮液在40 d之内不产生沉淀,酸碱环境体系对高分子具有一定的腐蚀作用,降低悬浮液的稳定性,p H=7时,悬浮液体系最稳定;同时讨论了不同盐体系对悬浮液体稳定性的影响,结果表明,不同盐体系中,NH4Cl对体系的稳定性影响最小,当体系添加0.4%NH4Cl时,体系沉淀量最小,为0. 63wt%。
In order to realize the high value application of micro silicon powder,the trace elements such as silicon,magnesium and calcium in micro silicon powder are fully utilized.Sodium hexametaphosphate as dispersant and xanthan gum as stabilizer.The formula and preparation process of micro silica suspension liquid film were determined by single factor experiment and three factors and three levels of orthogonal experiment.Sedimentation experiments were carried out to analyze the stability of suspensions at different temperatures,acids and bases and salts.The rheological properties and dispersity of micro silica powder were analyzed by means of rheometer and laser particle size analyzer.The results show that the xanthan gum,silica fume,six partial sodium phosphate content were 0.15wt%,0.5 wt%,0.5 wt%,can be obtained by micro silica suspension liquid film dispersion,the best temperature suspension for 10-30℃,to ensure that the micro silicon powder suspending liquid film in suspension 40 d without precipitation,the pH of system has corrosion effect on polymer,reduce the stability of the pH=7 suspension,the suspension system is the most stable;at the same time,the effects of different salt systems on the stability of suspension liquid were discussed.The results showed that the effect of NH 4Cl on the stability of suspension liquid was the least in different salt systems,and when 0.4%NH 4Cl was added to the system,the precipitation amount of the system was the smallest 0.63wt%.
作者
马佳庆
铁生年
MA Jia-qing;TIE Sheng-nian(New Energy(Photovoltaic)Industry Research Center,Qinghai University,Xining 810016,China)
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第10期3248-3255,共8页
Bulletin of the Chinese Ceramic Society
基金
材料复合新技术国家重点实验室(武汉理工大学)开放基金(2017-KF-4)
青海省重点实验室项目(2015-Z-Y02
2016)
关键词
微硅粉
悬浮液体地膜
制备
稳定性
分散性
micro-silica
fume suspension liquid film
preparation
stability
dispersibility
