(1. 中南大學 材料科學與工程學院，長沙 410083;
2. 湖南有色金屬研究院，長沙 410015)
摘 要: 選用3種分散劑(聚乙烯吡咯烷酮、檸檬酸三銨、β-丙氨酸)，通過球磨分散法制備ITO漿料，通過考察球磨分散時間和分散劑量對ITO漿料穩(wěn)定性能的影響，分析比較不同分散劑對漿料穩(wěn)定性作用，并探究其分散機理。結果表明：3種分散劑分散機制均為靜電和空間位阻穩(wěn)定作用；在相對ITO粉體質量比為5%、最佳球磨分散時間為48 h時，在15 d內ITO漿料的RSH可維持在10%以內；3種分散劑對ITO漿料穩(wěn)定性的影響由強至弱的順序為：聚乙烯吡咯烷酮＞β-丙氨酸＞檸檬酸三銨，與其在溶液中酸堿性強弱順序一致，其中聚乙烯吡咯烷酮的分散效果最好。
關鍵字: ITO漿料；分散劑；穩(wěn)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
