Rheological Properties of Aqueous Si3N4 and MoSi2 Suspensions Tailor-Made for Direct Inkjet Printing
Rheological Properties of Aqueous Si3N4 and MoSi2 Suspensions Tailor-Made for Direct Inkjet Printing
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DOI：
10.1111/j.1551-2916.2010.04052.x
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发表时间：
2011-01-01
影响因子：
3.9
通讯作者：
Telle, Rainer
中科院分区：
文献类型：
--
作者：
Cappi, Benjamin;Ebert, Joerg;Telle, Rainer
本研究的目的是揭示调整水性非氧化物陶瓷油墨生产复杂形状的功能性陶瓷部件的直接喷墨印刷使用的氮化硅（Si 3 N4）和二硅化钼（MoSi 2）的例子的可行性。在第一步中，通过添加有机和无机添加剂来制备具有高固体含量的Si 3 N4和MoSi 2水悬浮液，以满足关于印刷系统的流变性能的要求。为此，调节粘度、ζ电位和表面张力。由于打印头的物理条件，悬浮液的粒度分布被优化。通过计算悬浮液的Ohnesorge数对实验进行了验证。结果表明，这些值完全符合要求的范围。进行了3D组件和Si 3 N4/MoSi 2多层膜的打印。印刷工艺的最佳性能和控制导致制造均匀的绿色体，而没有分层或其他工艺相关的缺陷。
The aim of this study was to reveal the feasibility of adjusting aqueous nonoxide ceramic inks for producing complex-shaped functional ceramic parts by direct inkjet printing using the example of silicon nitride (Si3N4) and molybdenum disilicide (MoSi2). In a first step, aqueous Si3N4 and MoSi2 suspensions with high solid contents were prepared by the addition of organic and inorganic additives to meet the requirements regarding rheological properties of the printing system. For this purpose, viscosity, zeta potential, and surface tension were adjusted. Because of the physical conditions of the printing head, the particle size distribution of the suspensions was optimized. The experiments were verified by calculating the Ohnesorge number of suspensions. The results show that the values fit well into the required range. Printing of 3D-components and Si3N4/MoSi2 multilayers was carried out. Optimal performance and control of the printing process resulted in fabrication of homogeneous green bodies without delaminations or other process-dependent defects.