反相微乳液法非水相ZrO_2陶瓷墨水的制备与性能

Preparation and Properties of ZrO_2 Non-Aqueous Ceramic Inks by Reverse Microemulsion Method

非水反相微乳液体系陶瓷墨水可以在成型后快速干燥,有利于获得均匀、致密堆积的陶瓷坯体,但非水微乳液体系较水性微乳液体系复杂,制备难度大.采用脂肪醇聚氧乙烯九醚(AEO9)/正丁醇/正辛烷/乙醇体系,研究体系的组成设计,绘制不同组分配比和不同温度时的体系拟三元相图,最佳组成的质量分数为AEO9∶正丁醇∶正辛烷=29.1∶19.4∶51.5,温度控制在30℃为宜.制备了ZrOCl2·8H2O和NH3·H2O两种非水微乳液,将二者搅拌混合,反应制得ZrO2陶瓷墨水.从喷射打印成型的技术要求出发,考察了陶瓷墨水的物理化学性能及变化规律.结果表明,陶瓷墨水透明稳定,质量浓度达1.4%,粒度20nm左右,高度分散,表面张力、粘度等指标均满足间歇式喷墨打印机的技术要求,仅电导率与连续式喷墨打印机的技术要求存在一定差距.

It is easy to dry and obtain a homogeneously compacted body by jet printing a non-aqueous microemulsion ceramic ink. But a non-aqueous microemulsion system is complicated and difficult to prepare. AEO_9/butanol/octane/ethanol non-aqueous reverse microemulsion system was selected and quasi-ternary phase diagram of this system with different compositions and at different temperatures was presented respectively. The best composition of the system was AEO_9∶n-butanol∶n-octane=29.1% ∶19.4%∶51.5% (in mass) at 30℃. ZrO_2 ceramic inks were readily prepared by reacting ZrOCl_2·8H_2O with NH_3·H_2O in AEO_9/butanol/octane/ethanol non-aqueous reverse microemulsion while keeping vigorous stirring. A series of the physicochemical properties of the ceramic inks were determined and analyzed based on the requirements of jet printing. The results shew that the prepared ceramic inks were clear, transparent and very stable. The solid content reached 1.4% in mass and the particle size was about 20 nm and well dispersed in the system. Surface tension and viscosity of the inks could meet the requirements of drop-on-demand jet-printer, but conductivity was not sufficiently high for the continuous jet-printer.