RT Journal Article A1 Guangran ZHANG,Adrian GOLDSTEIN,Yiquan WU; AD 阿尔弗雷德大学纽约州立陶瓷学院稻盛和夫工程系, 美国 ; Israel Ceramic and Silicate Institute, 以色列 ; 阿尔弗雷德大学纽约州立陶瓷学院稻盛和夫工程系, 美国 T1 Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics YR 2022 IS 3 vo 11 OP 470-OP 481 K1 transparent ceramics;spinel;magnesium gallate (MgGa2O4);pulsed electric current sintering (PECS) AB In this study we fabricated, for the first time, magnesium gallate (MgGa2O4, a partially inverted spinel) transparent ceramics, both undoped and doped with 1 at% Ni. The specimens were derived from in-house prepared powder, with a crystallite size of ~10 nm (by wet chemistry) and densified by pulsed electric current sintering (PECS; peak temperature 950 ℃ for 90 min). Densification levels of 99.84% and 99.52% of theoretical density were attained for doped and undoped materials, respectively. Doping with Ni was seen to marginally improve the densification level. Quite transparent specimens were produced: the best showing transmission of ~89% of the theoretical level (thickness t = 0.85 mm). The absorption spectra revealed that the dopant was accumulated as Ni2+ in the octahedral sites of the lattice, as occurs in single-crystal specimens. After excitation at 980 nm, the doped disks exhibited a wide fluorescence band centered at 1264 nm. SN 2226-4108 LA EN