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|Three Dimensional Ceramics Printing to Create Ordered Dendrite Structures for Energy and Material Flows Modulation|
|Keywords: Stereolithography, 3D Printing, Ceramic Microstructure|
|Ceramics dendrites with spatially ordered micro cavities were successfully fabricated by three dimensional printing of stereolithography. Micro lattices pattern were propagated spatially in computer graphic space. Ceramics nanoparticles were dispersed in to photo sensitive liquid resins to obtain thixotropic slurries. The paste material was spread on a grass substrate by using a mechanical knife edge, and an ultra violet micro pattern was exposed by a digital micro-mirror device to create cross sectional solid layer. The ceramics dendrites were obtained by layer stacking. The composite precursor was dewaxed and sintered in an air atmosphere. Through this process, solid electrolyte dendrites of yttria stabilized zirconia were fabricated for fuel cell miniaturizations Gaseous fluid profiles and pressure distributions in the formed ceramic lattices were visualized and analyzed by a finite element method. Subsequently, alumina photonic crystals with a diamond lattice structure were fabricated. Electromagnetic wave properties were measured by using a terahertz time domain spectroscopy. A complete photonic band gap was exhibited, and a localized mode to select the wavelength was obtained by introducing a defect cavity. Moreover, artificial bones of hydroxyapatite scaffolds were modeled to realize excellent biological compatibilities. Graded porous structures in the artificial bones were processed.|
|Soshu Kirihara, Associate Professor