Comparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δ
In this study, we investigate the utility of Ca _2 FeMnO _6- _δ and Sr _2 FeMnO _6- _δ as materials with low thermal conductivity, finding potential applications in thermoelectrics, electronics, solar devices, and gas turbines for land and aerospace use. These compounds, characterized as oxygen-defi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | ECS Advances |
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| Online Access: | https://doi.org/10.1149/2754-2734/ad27dc |
| _version_ | 1797303340488458240 |
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| author | Ebony Schultz Mandy Guinn Alexa D. Azure Ram Krishna Hona |
| author_facet | Ebony Schultz Mandy Guinn Alexa D. Azure Ram Krishna Hona |
| author_sort | Ebony Schultz |
| collection | DOAJ |
| description | In this study, we investigate the utility of Ca _2 FeMnO _6- _δ and Sr _2 FeMnO _6- _δ as materials with low thermal conductivity, finding potential applications in thermoelectrics, electronics, solar devices, and gas turbines for land and aerospace use. These compounds, characterized as oxygen-deficient perovskites, feature distinct vacancy arrangements. Ca _2 FeMnO _6- _δ adopts a brownmillerite-type orthorhombic structure with ordered vacancy arrangement, while Sr _2 FeMnO _6- _δ adopts a perovskite cubic structure with disordered vacancy distribution. Notably, both compounds exhibit remarkably low thermal conductivity, measuring below 0.50 Wm ^−1 K ^−1 . This places them among the materials with the lowest thermal conductivity reported for perovskites. The observed low thermal conductivity is attributed to oxygen vacancies and phonon scattering. Interestingly as SEM images show the smaller grain size, our findings suggest that creating vacancies and lowering the grain size or increasing the grain boundaries play a crucial role in achieving such low thermal conductivity values. This characteristic enhances the potential of these materials for applications where efficient heat dissipation, safety, and equipment longevity are paramount. |
| first_indexed | 2024-03-07T23:51:23Z |
| format | Article |
| id | doaj.art-b5d7185a8b874221a4b988e6d021daa5 |
| institution | Directory Open Access Journal |
| issn | 2754-2734 |
| language | English |
| last_indexed | 2024-03-07T23:51:23Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | ECS Advances |
| spelling | doaj.art-b5d7185a8b874221a4b988e6d021daa52024-02-19T06:58:03ZengIOP PublishingECS Advances2754-27342024-01-013101400110.1149/2754-2734/ad27dcComparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δEbony Schultz0Mandy Guinn1Alexa D. Azure2Ram Krishna Hona3https://orcid.org/0000-0002-7436-809XEnvironmental Science Department, United Tribes Technical College, Bismarck, North Dakota 58504, United States of AmericaEnvironmental Science Department, United Tribes Technical College, Bismarck, North Dakota 58504, United States of AmericaEngineering Department, United Tribes Technical College, Bismarck, North Dakota 58504, United States of AmericaEnvironmental Science Department, United Tribes Technical College, Bismarck, North Dakota 58504, United States of AmericaIn this study, we investigate the utility of Ca _2 FeMnO _6- _δ and Sr _2 FeMnO _6- _δ as materials with low thermal conductivity, finding potential applications in thermoelectrics, electronics, solar devices, and gas turbines for land and aerospace use. These compounds, characterized as oxygen-deficient perovskites, feature distinct vacancy arrangements. Ca _2 FeMnO _6- _δ adopts a brownmillerite-type orthorhombic structure with ordered vacancy arrangement, while Sr _2 FeMnO _6- _δ adopts a perovskite cubic structure with disordered vacancy distribution. Notably, both compounds exhibit remarkably low thermal conductivity, measuring below 0.50 Wm ^−1 K ^−1 . This places them among the materials with the lowest thermal conductivity reported for perovskites. The observed low thermal conductivity is attributed to oxygen vacancies and phonon scattering. Interestingly as SEM images show the smaller grain size, our findings suggest that creating vacancies and lowering the grain size or increasing the grain boundaries play a crucial role in achieving such low thermal conductivity values. This characteristic enhances the potential of these materials for applications where efficient heat dissipation, safety, and equipment longevity are paramount.https://doi.org/10.1149/2754-2734/ad27dcX-ray diffractionthermal conductivitysolid state reactionperovskite oxides |
| spellingShingle | Ebony Schultz Mandy Guinn Alexa D. Azure Ram Krishna Hona Comparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δ ECS Advances X-ray diffraction thermal conductivity solid state reaction perovskite oxides |
| title | Comparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δ |
| title_full | Comparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δ |
| title_fullStr | Comparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δ |
| title_full_unstemmed | Comparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δ |
| title_short | Comparative Thermal Insulation Nature of Ca2FeMnO6−δ and Sr2FeMnO6−δ |
| title_sort | comparative thermal insulation nature of ca2femno6 δ and sr2femno6 δ |
| topic | X-ray diffraction thermal conductivity solid state reaction perovskite oxides |
| url | https://doi.org/10.1149/2754-2734/ad27dc |
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