@article {3182021,
	title = {Fabrication of Ruby by 3D Printing of Transparent Salt Solutions},
	journal = {Journal of the European Ceramic Society},
	year = {2024},
	pages = {116773},
	abstract = {A novel method is presented for fabricating 3D-printed Cr<sup>3+</sup>-doped α-Al<sub>2</sub>O<sub>3</sub>\&nbsp;complex structures, known as Ruby, using digital light processing (DLP) 3D printing and sol-gel reactions based on solutions only. The aqueous printing solution comprises aluminum and chromium chloride as the sol-gel precursor and acrylic acid (AA) as the polymerizable component. After photopolymerization, aging, and sintering at 1150{\textdegree}C, structures shrink up to 28{\textpm}7\%, achieving a final printing resolution of 55.7{\textpm}0.7 μm, surpassing the nominal printer{\textquoteright}s resolution of 200 μm. Characterization includes X-ray diffraction, scanning electron microscopy, UV-Vis, and fluorescence measurements, revealing crystalline Cr:α-Al<sub>2</sub>O<sub>3</sub>\&nbsp;composition emitting at 693\&nbsp;nm. The structures exhibit maximum compression stress of 89{\textpm}3\&nbsp;MPa and microhardness of 340-500 HV, showcasing potential applications in thermal insulation, jewelry, and mechanical uses.},
	url = {https://doi.org/10.1016/j.jeurceramsoc.2024.116773},
	author = {May Yam Moshkovitz Douvdevany and Danielle Paz and Shlomo Magdassi}
}
