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Ferroelectrics Volume 568, 2020 - Issue 1
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Articles

Structure and mechanical properties of hyper-hardened solid solutions Li0.12Na0.88TayNb1–yO3

Mikhail N. Palatnikova Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation;View further author information
,
Lyudmila A. Aleshinab Department of Solid State Physics, Petrozavodsk State University, Petrozavodsk, Karelian Republic, Russian FederationView further author information
,
Olga B. Shcherbinaa Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation;Correspondence[email protected]
ORCID Iconhttps://orcid.org/0000-0001-9591-0274View further author information
ORCID Icon,
Vadim. V. Efremova Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation;View further author information
,
Olga V. Sidorovab Department of Solid State Physics, Petrozavodsk State University, Petrozavodsk, Karelian Republic, Russian FederationView further author information
&
Alexandra V. Kadetovaa Tananaev Institute of Chemistry – Subdivision of the Federal Research Centre, Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation;View further author information
Pages 23-38 | Received 27 Nov 2019, Accepted 14 Jul 2020, Published online: 03 Nov 2020
 
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Abstract

An influence of hyper-hardening on structure and mechanical properties of ceramic solid solutions (SS) Li0.12Na0.88Ta y Nb1– y O3 with tantalum concentrations у = 0.05; 0.25; 0.4 has been revealed. The researched was carried out using X-ray diffraction and scanning probe microscopy methods. Two ferroelectric phases co-exist in initial non-hardened SS Li0.12Na0.88Ta y Nb1– y O3: hexagonal R3cH and rhombic P21ma. A symmetric rhombic phasePbnm prevails in hardened samples. Hyper-hardening has been established to sufficiently increase micro-hardness and surface strength of SSLi0.12Na0.88Ta y Nb1– y O3ceramic samples.

Additional information

Funding

This work was supported by the Ministry of Science and Higher Education Russian Federation scientific topic No 0226-2019-0038 (registration # АААА-А18-118022190125-2) and by the Development program of the Petrozavodsk State University for 2017–2021 years.

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