高固相含量纳米ITO水基浆料流变性能的研究  

Study on the Rheological Behavior of Highly Concentrated Aqueous ITO Nanoparticle Slurries

作　　者：侯俊峰[1] 李志友[1] 周科朝[1] 甘雪萍[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《人工晶体学报》2013年第8期1543-1547,共5页Journal of Synthetic Crystals

摘　　要：以PAA为分散剂制备高固相含量纳米ITO水基浆料，研究了pH值、分散剂用量、固相含量对浆料流变性能的影响。结果表明：PAA对改善纳米ITO粉体的表面电动特性有显著作用，PAA的加入使粉体Zeta电位从-16mV降到-38mV；高固相含量的浆料均呈现出明显的剪切变稀行为；浆料粘度随固相含量增加而急剧增大；最佳的PAA用量及pH值范围分别为0．06mg／m2和10—11。55wt％固相含量的浆料在150S-1剪切速率下粘度为0．38Pa·s，以此为原料采用胶态成型技术制备出微观结构均匀的ITO陶瓷素坯。High solid content aqueous suspensions of ITO nanoparticle were prepared using PAA as dispersant. The influence of pH value, disperant amount and solid content on the rheological properties of suspensions were investigated. The results showed that PAA can obviously improve the electro-kinetic behavior of ITO particles. The addition of dispersant PAA to the suspension caused the Zeta potential decreased from - 16 mV to - 38 mV. Highly concentrated suspensions show remarkably shear-thinning behavior. Viscosity of suspensions increased sharply with the increase of solid content. The optimum PAA content and pH range were 0.06 mg/m2 and 10-11 respectively. The suspension with 55wt% solid was suitable for colloidal processing with viscosity of 0.38 Pa s at 150 s-1. Finally, green bodies with uniform microstructures have been obtained successfully.

关 键 词：ITO纳米粉体 ZETA电位 流变性能 粘度 

分 类 号：O648[理学—物理化学]