(1. 中南大学 材料科学与工程学院，长沙 410083;
2. 湖南有色金属研究院，长沙 410015)
摘 要: 选用3种分散剂(聚乙烯吡咯烷酮、柠檬酸三铵、β-丙氨酸)，通过球磨分散法制备ITO浆料，通过考察球磨分散时间和分散剂量对ITO浆料稳定性能的影响，分析比较不同分散剂对浆料稳定性作用，并探究其分散机理。结果表明：3种分散剂分散机制均为静电和空间位阻稳定作用；在相对ITO粉体质量比为5%、最佳球磨分散时间为48 h时，在15 d内ITO浆料的RSH可维持在10%以内；3种分散剂对ITO浆料稳定性的影响由强至弱的顺序为：聚乙烯吡咯烷酮＞β-丙氨酸＞柠檬酸三铵，与其在溶液中酸碱性强弱顺序一致，其中聚乙烯吡咯烷酮的分散效果最好。
关键字: ITO浆料；分散剂；稳定性；球磨分散
ITO suspension
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Nonferrous Metals Research Institute of Hunan, Changsha 410015, China）
Abstract:The effects of three dispersants (PVP, Triammonium citrate, β-Alanine) on the stability of ITO suspension prepared by ball milling dispersion were studied. The influences of dispersing time and dispersant content on stability of ITO suspension were investigated. And the roles of the different dispersant and their dispersing mechanism on stability of ITO suspension were also investigated. The results show that the stability and dispersion mechanisms of the three dispersants are electrostatic and steric hindrance, and make ITO suspension keep RSH＜10% within 15 days under the conditions that the dispersant/ITO powder is 5%(mass ratio) and optimal ball milling dispersion time is 48 h. The sequence of effects of these three dispersants on the stability of ITO suspension is PVP＞β-alanine＞triammonium citrate, which is in agreement with the sequence of their acidity and alkalinity in the suspension. Among these three dispersants, PVP is the best one for the stability of ITO suspension.
Key words: ITO suspension; stability; dispersant; ball milling dispersion
