Controlling the rheology of direct writing pastes is essential for producing high quality printed ceramics. Ceramic pastes were formulated to explore the relation between surface chemistry and rheology of complex pastes of Pb(In_1/2Nb_1/2)O₃‐Pb(Mg_1/3Nb_2/3)O₃‐PbTiO₃ (PIN‐PMN‐PT) powder, large BaTiO₃ (BT) platelet particles, and a commercial poly(acrylic) acid‐based binder system. Zeta potential of the ceramic powder, the conformation of the poly(acrylic) acid, and the effect of these factors on rheology were evaluated as a function of suspension pH. Effective dispersion and amenable rheology for direct writing were achieved at mixing pH 5. Additions of 0.3 to 2.6 vol% BT tabular particles dramatically altered the rheology of the pastes due to the shear alignment of the BT particles. Powder‐organic interactions and the size and concentration of BT platelet particles can be tailored to direct write either space‐filling filaments to form dense ceramics or non‐flowing filaments to form spanning ceramic structures.

中文翻译：

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具有各向异性模板颗粒的直接写入铅基压电陶瓷浆料的分散性和流变性

控制直写浆料的流变性对于生产高质量的印刷陶瓷至关重要。配制陶瓷浆料以研究Pb（In _1/2 Nb _1/2）O ₃ ‐Pb（Mg _1/3 Nb _2/3）O ₃ ‐PbTiO ₃（PIN- ）复合浆料的表面化学性质与流变学之间的关系。PMN-PT）粉末，大型BaTiO ₃（BT）血小板颗粒和市售的基于聚丙烯酸的粘合剂体系。根据悬浮液pH值评估了陶瓷粉末的ζ电位，聚丙烯酸的构象以及这些因素对流变学的影响。在混合pH值为5时，可以实现有效的分散和直接书写的流变性能。由于BT颗粒的剪切排列，添加0.3至2.6 vol％的BT片状颗粒可显着改变糊剂的流变性。可以调整粉末有机物的相互作用以及BT血小板颗粒的大小和浓度，以直接写入填充空间的细丝以形成致密的陶瓷，或者不流动的细丝以形成跨接的陶瓷结构。