@article{ZHANG2022, 
author = {Guangran ZHANG and Adrian GOLDSTEIN and Yiquan WU},
title = {Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics},
year = {2022},
journal = {Journal of Advanced Ceramics},
volume = {11},
number = {3},
pages = {470-481},
keywords = {magnesium gallate (MgGa2O4), spinel, transparent ceramics, pulsed electric current sintering (PECS)},
url = {https://www.sciopen.com/article/10.1007/s40145-021-0551-5},
doi = {10.1007/s40145-021-0551-5},
abstract = {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.}
}