Influence of the yttria dopant on the structure and properties of (ZrO 2 ) 0.91– x  (Sc 2 O 3 ) 0.09 (Y 2 O 3 )  х   ( x  = 0–0.02) crystals

D. A. Agarkov; S. V. Seryakov; V. A. Myzina; F. O. Milovich; E. E. Lomonova; I. E. Kuritsyna; A. V. Kulebyakin; L. D. Iskhakova; V. T. Bublik; S. I. Bredikhin; M. A. Borik; N. Yu. Tabachkova

doi:10.1134/S1063739716080023

Influence of the yttria dopant on the structure and properties of (ZrO₂)_0.91–x(Sc₂O₃)_0.09(Y₂O₃)_х (x = 0–0.02) crystals

作者: Agarkov D.¹, Seryakov S.²^,3, Myzina V.¹, Milovich F.², Lomonova E.¹, Kuritsyna I.¹, Kulebyakin A.², Iskhakova L.²^,4, Bublik V.³, Bredikhin S.¹, Borik M.², Tabachkova N.²
隶属关系:
1. Institute of Solid State Physics
2. Prokhorov Institute of General Physics
3. National Research University of Science and Technology MISIS
4. Research Center of Fiber Optics
期: 卷 45, 编号 8-9 (2016)
页面: 625-632
栏目: Article
URL: https://journals.rcsi.science/1063-7397/article/view/186161
DOI: https://doi.org/10.1134/S1063739716080023
ID: 186161

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We have studied the influence of the yttrium oxide (Y₂O₃) dopant (1 and 2 mol %) on the phase composition, structure, and electrical properties of ZrO₂–9 mol % Sc₂O₃ solid solution. Stabilization of ZrO₂ jointly with 9 mol % Sc₂O₃ and 2 mol % Y₂O₃ is shown to allow the acquisition of high phase stability transparent homogeneous crystals with a cubic structure. Their mechanical grinding is established to cause no change in the phase composition of these crystals, whereas the powders retain the initial fluorine structure. The powders preserved the original structure of the fluorite crystals. All the probed crystals reveal high microhardness and low fracture toughness. Increasing the Y₂O₃ concentration in the crystals led to a reduction of the maximum loads on the indenter, which the sample withstood without cracking. As is shown, the specific conductivity exhibits nonmonotonic behavior depending on the Y₂O₃ concentration in the crystals. Increasing the Y₂O₃ content to 2 mol % in the solid electrolyte reduces the conductivity of the crystals in the entire temperature range that is attributed to a decrease in the carrier mobility due to the increasing ion radius of the stabilizing ion.

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solid electrolytes, zirconia, crystal growth, single crystals, phase transitions, twins, ionic conductivity, mechanical properties

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Influence of the yttria dopant on the structure and properties of (ZrO₂)_0.91–x(Sc₂O₃)_0.09(Y₂O₃)_х (x = 0–0.02) crystals

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作者简介

D. Agarkov

S. Seryakov

V. Myzina

F. Milovich

E. Lomonova

I. Kuritsyna

A. Kulebyakin

L. Iskhakova

V. Bublik

S. Bredikhin

M. Borik

N. Tabachkova

Influence of the yttria dopant on the structure and properties of (ZrO2)0.91–x(Sc2O3)0.09(Y2O3)х (x = 0–0.02) crystals

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Influence of the yttria dopant on the structure and properties of (ZrO₂)_0.91–x(Sc₂O₃)_0.09(Y₂O₃)_х (x = 0–0.02) crystals