Nan Bo, Gołębiewski Przemysław, Buczyński Ryszard, Galindo-Rosales Francisco J, Ferreira José M F
Department of Materials and Ceramic Engineering, University of Aveiro, CICECO-Aveiro Materials Institute, 3810-193 Aveiro, Portugal.
CEITEC-Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00 Brno, Czech Republic.
Materials (Basel). 2020 Apr 1;13(7):1636. doi: 10.3390/ma13071636.
In this paper, we present a preliminary study and conceptual idea concerning 3D printing water-sensitive glass, using a borosilicate glass with high alkali and alkaline oxide contents as an example in direct ink writing. The investigated material was prepared in the form of a glass frit, which was further ground in order to obtain a fine powder of desired particle size distribution. In a following step, inks were prepared by mixing the fine glass powder with Pluoronic F-127 hydrogel. The acquired pastes were rheologically characterized and printed using a Robocasting device. Differential scanning calorimetry (DSC) experiments were performed for base materials and the obtained green bodies. After sintering, scanning electron microscope (SEM) and X-ray diffraction (XRD) analyses were carried out in order to examine microstructure and the eventual presence of crystalline phase inclusions. The results confirmed that the as obtained inks exhibit stable rheological properties despite the propensity of glass to undergo hydrolysis and could be adjusted to desirable values for 3D printing. No additional phase was observed, supporting the suitability of the designed technology for the production of water sensitive glass inks. SEM micrographs of the sintered samples revealed the presence of closed porosity, which may be the main reason of light scattering.
在本文中，我们以一种高碱和碱性氧化物含量的硼硅酸盐玻璃为例，在直接墨水书写中展示了关于3D打印水敏玻璃的初步研究和概念想法。所研究的材料制成玻璃料的形式，进一步研磨以获得具有所需粒度分布的细粉。接下来的步骤是，通过将细玻璃粉与普朗尼克F - 127水凝胶混合来制备墨水。对获得的糊剂进行流变学表征，并使用机器人铸造设备进行打印。对基础材料和所得生坯进行差示扫描量热法（DSC）实验。烧结后，进行扫描电子显微镜（SEM）和X射线衍射（XRD）分析，以检查微观结构和结晶相夹杂物的最终存在情况。结果证实，尽管玻璃有水解倾向，但所获得的墨水仍表现出稳定的流变性能，并且可以调整到适合3D打印的值。未观察到额外的相，这支持了所设计技术用于生产水敏玻璃墨水的适用性。烧结样品的SEM显微照片显示存在封闭孔隙，这可能是光散射的主要原因。
