Study of the Structural, Electrical, and Mechanical Properties and Morphological Features of Y-Doped CeO2 Ceramics with Porous Structure
In this work, ceramic samples of cerium oxide doped with yttrium were investigated. The concentration of a dopant Y(NO3)3 varied from 5 to 25 wt% in the initial charge. In the course of the experiment, a simple method was developed to obtain ceramics with a porosity of ~20% via one-step annealing in...
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| Veröffentlicht in: | Journal of composites science 2023-10, Vol.7 (10), p.411 |
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| creator | Shakirzyanov, Rafael I. Volodina, Natalia O. Kozlovskiy, Artem L. Zdorovets, Maxim V. Shlimas, Dmitriy I. Borgekov, Daryn B. Garanin, Yuriy A. |
| description | In this work, ceramic samples of cerium oxide doped with yttrium were investigated. The concentration of a dopant Y(NO3)3 varied from 5 to 25 wt% in the initial charge. In the course of the experiment, a simple method was developed to obtain ceramics with a porosity of ~20% via one-step annealing in air in a muffle furnace. For comparison, samples with two annealings were also synthesized to determine the effects of pores on electrical, structural, and mechanical characteristics. The obtained samples were examined via X-ray powder diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy, Raman spectroscopy, dielectric spectroscopy, and Vickers microhardness measurements. The substitution of Ce4+ ions with Y3+ ions led to a significant decrease in the lattice parameter, average crystallite size, and average grain size, with a simultaneous increase in the lattice defectivity, dielectric constant, electrical conductivity, and microhardness values. It is shown that samples with a dopant weight fraction of 0.05–0.15 and one-step annealing have favorable electrical and mechanical characteristics for energy applications as porous materials with ionic conductivity. |
| doi_str_mv | 10.3390/jcs7100411 |
| format | Article |
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The concentration of a dopant Y(NO3)3 varied from 5 to 25 wt% in the initial charge. In the course of the experiment, a simple method was developed to obtain ceramics with a porosity of ~20% via one-step annealing in air in a muffle furnace. For comparison, samples with two annealings were also synthesized to determine the effects of pores on electrical, structural, and mechanical characteristics. The obtained samples were examined via X-ray powder diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy, Raman spectroscopy, dielectric spectroscopy, and Vickers microhardness measurements. The substitution of Ce4+ ions with Y3+ ions led to a significant decrease in the lattice parameter, average crystallite size, and average grain size, with a simultaneous increase in the lattice defectivity, dielectric constant, electrical conductivity, and microhardness values. It is shown that samples with a dopant weight fraction of 0.05–0.15 and one-step annealing have favorable electrical and mechanical characteristics for energy applications as porous materials with ionic conductivity.</description><identifier>ISSN: 2504-477X</identifier><identifier>EISSN: 2504-477X</identifier><identifier>DOI: 10.3390/jcs7100411</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Annealing ; Annealing furnaces ; Ceramics ; Cerium oxides ; Crystallites ; Diamond pyramid hardness ; Dopants ; Electric properties ; Electrical resistivity ; Electrolytes ; Grain size ; Heat conductivity ; Heat resistance ; Homogenization ; Ion currents ; Mechanical properties ; Morphology ; Muffle furnaces ; Nitrates ; Nuclear fuels ; Nuclear reactors ; Polyvinyl alcohol ; Porosity ; Porous materials ; Radiation ; Raman spectroscopy ; Scanning electron microscopy ; Solid oxide fuel cells ; Spectrum analysis ; Temperature ; X ray powder diffraction</subject><ispartof>Journal of composites science, 2023-10, Vol.7 (10), p.411</ispartof><rights>2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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It is shown that samples with a dopant weight fraction of 0.05–0.15 and one-step annealing have favorable electrical and mechanical characteristics for energy applications as porous materials with ionic conductivity.</description><subject>Annealing</subject><subject>Annealing furnaces</subject><subject>Ceramics</subject><subject>Cerium oxides</subject><subject>Crystallites</subject><subject>Diamond pyramid hardness</subject><subject>Dopants</subject><subject>Electric properties</subject><subject>Electrical resistivity</subject><subject>Electrolytes</subject><subject>Grain size</subject><subject>Heat conductivity</subject><subject>Heat resistance</subject><subject>Homogenization</subject><subject>Ion currents</subject><subject>Mechanical properties</subject><subject>Morphology</subject><subject>Muffle furnaces</subject><subject>Nitrates</subject><subject>Nuclear fuels</subject><subject>Nuclear reactors</subject><subject>Polyvinyl alcohol</subject><subject>Porosity</subject><subject>Porous materials</subject><subject>Radiation</subject><subject>Raman spectroscopy</subject><subject>Scanning electron microscopy</subject><subject>Solid oxide fuel cells</subject><subject>Spectrum analysis</subject><subject>Temperature</subject><subject>X ray powder diffraction</subject><issn>2504-477X</issn><issn>2504-477X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpNUNtKAzEUDKJgqX3xCwK-idWT214epVoVKi1UQZ-WbJJ1t2ybNcki_QM_29SK-nLOHGaY4QxCpwQuGcvhaqV8SgA4IQdoQAXwMU_Tl8N_-BiNvF8BAE1zDjkboM9l6PUW2wqH2uBlcL0KvZPtBb5tjQquUTssNxo_GlXLze7GC2c740Jj_J6xrqtta9--yamR0SFS0fN1fBOVGk_MnMbh5LpRHn80ocYL62zvfxPNCTqqZOvN6GcP0fP09mlyP57N7x4m17OxooKH-EWuS60FlIqAYGWSJFSnUBFuZJKA5pyIXFVJmUkKJNVUEZNRJTmwUgjG2BCd7X07Z99740Oxsr3bxMiCZhkVWZolIqrO9yrlrPfOVEXnmrV024JAsSu7-CubfQHkwnJl</recordid><startdate>20231001</startdate><enddate>20231001</enddate><creator>Shakirzyanov, Rafael I.</creator><creator>Volodina, Natalia O.</creator><creator>Kozlovskiy, Artem L.</creator><creator>Zdorovets, Maxim V.</creator><creator>Shlimas, Dmitriy I.</creator><creator>Borgekov, Daryn B.</creator><creator>Garanin, Yuriy A.</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0002-9727-0511</orcidid><orcidid>https://orcid.org/0000-0003-2992-1375</orcidid><orcidid>https://orcid.org/0000-0003-2454-7177</orcidid><orcidid>https://orcid.org/0000-0001-8832-7443</orcidid><orcidid>https://orcid.org/0000-0002-0759-4329</orcidid><orcidid>https://orcid.org/0000-0002-0109-7102</orcidid></search><sort><creationdate>20231001</creationdate><title>Study of the Structural, Electrical, and Mechanical Properties and Morphological Features of Y-Doped CeO2 Ceramics with Porous Structure</title><author>Shakirzyanov, Rafael I. ; 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The concentration of a dopant Y(NO3)3 varied from 5 to 25 wt% in the initial charge. In the course of the experiment, a simple method was developed to obtain ceramics with a porosity of ~20% via one-step annealing in air in a muffle furnace. For comparison, samples with two annealings were also synthesized to determine the effects of pores on electrical, structural, and mechanical characteristics. The obtained samples were examined via X-ray powder diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy, Raman spectroscopy, dielectric spectroscopy, and Vickers microhardness measurements. The substitution of Ce4+ ions with Y3+ ions led to a significant decrease in the lattice parameter, average crystallite size, and average grain size, with a simultaneous increase in the lattice defectivity, dielectric constant, electrical conductivity, and microhardness values. 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| subjects | Annealing Annealing furnaces Ceramics Cerium oxides Crystallites Diamond pyramid hardness Dopants Electric properties Electrical resistivity Electrolytes Grain size Heat conductivity Heat resistance Homogenization Ion currents Mechanical properties Morphology Muffle furnaces Nitrates Nuclear fuels Nuclear reactors Polyvinyl alcohol Porosity Porous materials Radiation Raman spectroscopy Scanning electron microscopy Solid oxide fuel cells Spectrum analysis Temperature X ray powder diffraction |
| title | Study of the Structural, Electrical, and Mechanical Properties and Morphological Features of Y-Doped CeO2 Ceramics with Porous Structure |
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