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Research Article | Open Access

Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics

Guangran ZHANGa, Adrian GOLDSTEINb, Yiquan WUa( )
Kazuo Inamori School of Engineering, New York State College of Ceramics, Alfred University, Alfred, New York 14802, USA
Israel Ceramic and Silicate Institute, Haifa, Israel
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Graphical Abstract

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.

Keywords

magnesium gallate (MgGa2O4)spineltransparent ceramicspulsed electric current sintering (PECS)

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Journal of Advanced Ceramics
Volume 11 Issue 3,
March 2022
Pages 470-481
DOI: 10.1007/s40145-021-0551-5
Cite this article:
ZHANG G, GOLDSTEIN A, WU Y. Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics. Journal of Advanced Ceramics, 2022, 11(3): 470-481. https://doi.org/10.1007/s40145-021-0551-5

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Received: 11 August 2021
Revised: 16 October 2021
Accepted: 01 November 2021
Published: 12 January 2022
© The Author(s) 2021.

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