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Research Article | Open Access

IR-transparent MgO-Gd2O3 composite ceramics produced by self-propagating high-temperature synthesis and spark plasma sintering

Dmitry A. PERMINa,b( ), Maksim S. BOLDINb, Alexander V. BELYAEVa, Stanislav S. BALABANOVa, Vitaly A. KOSHKINa,b, Atrem A. MURASHOVb, Igor V. LADENKOVc, Evgeny A. LANTSEVb, Ksenia E. SMETANINAb, Nadia M. KHAMALETDINOVAd
G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the RAS, Nizhny Novgorod 603137, Russia
Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod 603950, Russia
"Joint-stock company" Research and Production Enterprise "Salut", Nizhny Novgorod 603950, Russia
G.A. Razuvaev Institute of Organometallic Chemistry of the RAS, Nizhny Novgorod 603137, Russia
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Abstract

A glycine-nitrate self-propagating high-temperature synthesis (SHS) was developed to produce composite MgO-Gd2O3 nanopowders. The X-ray powder diffraction (XRD) analysis confirmed the SHS-product consists of cubic MgO and Gd2O3 phases with nanometer crystallite size and retains this structure after annealing at temperatures up to 1200 ℃. Near full dense high IR-transparent composite ceramics were fabricated by spark plasma sintering (SPS) at 1140 ℃ and 60 MPa. The in-line transmittance of 1 mm thick MgO-Gd2O3 ceramics exceeded 70% in the range of 4-5 mm and reached a maximum of 77% at a wavelength of 5.3 mm. The measured microhardness HV0.5 of the MgO-Gd2O3 ceramics is 9.5±0.4 GPa, while the fracture toughness (KIC) amounted to 2.0±0.5 МPa·m1/2. These characteristics demonstrate that obtained composite MgO-Gd2O3 ceramic is a promising material for protective infra-red (IR) windows.

Keywords

MgO-Gd2O3self-propagating high-temperature synthesis (SHS)spark plasma sintering (SPS)optical propertiesinfra-red (IR) ceramics

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Journal of Advanced Ceramics
Volume 10 Issue 2,
April 2021
Pages 237-246
DOI: 10.1007/s40145-020-0434-1

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PERMIN DA, BOLDIN MS, BELYAEV AV, et al. IR-transparent MgO-Gd2O3 composite ceramics produced by self-propagating high-temperature synthesis and spark plasma sintering. Journal of Advanced Ceramics, 2021, 10(2): 237-246. https://doi.org/10.1007/s40145-020-0434-1

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Received: 03 July 2020
Revised: 05 October 2020
Accepted: 30 October 2020
Published: 10 February 2021
© The Author(s) 2020

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