Structural and spectroscopic properties of MgAl2O4:Nd3+ transparent ceramics fabricated by using two-step Spark Plasma Sintering

Neodymium-doped magnesium aluminate spinel Nd3+:MgAl2O4 transparent ceramics were successfully elaborated with significant Nd content (i.e. up to 0.2 at.%) by using Spark Plasma Sintering (SPS). Microstructural, structural, and optical properties of the obtained samples were compared to those of und...

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Bibliographic Details
Published in:Journal of alloys and compounds 2017-10, Vol.722, p.358-364
Main Authors: Boulesteix, R., Maître, A., Lemański, K., Dereń, P.J.
Format: Article
Language:English
Subjects:
Ceramics
Chemical Sciences
Crystal defects
Crystal structure
Engineering Sciences
Magnesium aluminate
Material chemistry
Materials
Neodymium
Optical properties
Plasma sintering
Single crystals
Spark plasma sintering
Spectroscopy
Spinel
SPS
Transparent ceramics
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Summary:Neodymium-doped magnesium aluminate spinel Nd3+:MgAl2O4 transparent ceramics were successfully elaborated with significant Nd content (i.e. up to 0.2 at.%) by using Spark Plasma Sintering (SPS). Microstructural, structural, and optical properties of the obtained samples were compared to those of undoped transparent spinel ceramics. The transparency is of about 70% in the visible region for undoped samples and of about 50% for neodymium-doped samples with a significant shift of the cut-off wavelength in UV region to higher values. Spectroscopic measurements have evidenced the formation of charge-compensating structural defects owing to Mg2+ substitution by Nd3+ in the spinel crystalline lattice. Nd3+ ions were incorporated up to 0.2 at.% in spinel crystalline lattice, largely higher than that possible in MgAl2O4 single-crystals. SPS thus appears as an appropriate technique to manufacture transparent materials with out-of-equilibrium structure and composition. •Nd3+:MgAl2O4 transparent ceramics were prepared by using Spark Plasma Sintering.•Incorporation of much above to equilibrium concentrations of Nd3+ ions was achieved.•Findings have great promise for the design of spinel-based light producing devices.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.06.101