Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics
Precursor powders for BaCe0.2Zr0.7Y0.1O3-δ(BCZY27) ceramics were synthesized by a modified Pechinimethod and calcined at 900°C for 12 h. The calcined BCZY27 powders were milled in eccentric and in high energy mill with the addition of 2 and 4mol% ZnO as sintering aid. The effects of milling and sint...
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University of Novi Sad
2021-09-01
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| Series: | Processing and Application of Ceramics |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1820-6131/2021/1820-61312103288O.pdf |
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| author | Ouba Ana Kaori de Oliveira Chinelatto Adilson Luiz Grzebielucka Edson Cezar Ramos Kethlinn Borcezi Janaina Semanech Chinelatto Adriana Scoton Antonio |
| author_facet | Ouba Ana Kaori de Oliveira Chinelatto Adilson Luiz Grzebielucka Edson Cezar Ramos Kethlinn Borcezi Janaina Semanech Chinelatto Adriana Scoton Antonio |
| author_sort | Ouba Ana Kaori de Oliveira |
| collection | DOAJ |
| description | Precursor powders for BaCe0.2Zr0.7Y0.1O3-δ(BCZY27) ceramics were synthesized by a modified Pechinimethod and calcined at 900°C for 12 h. The calcined BCZY27 powders were milled in eccentric and in high energy mill with the addition of 2 and 4mol% ZnO as sintering aid. The effects of milling and sintering aids on the sinterability and electrical conductivity were studied. The linear shrinkage in thermomechanical analyses started at 1050°C for the BCZY27 with 4mol% ZnO processed in eccentric mill. Theoretical density above of 90%TD was obtained for the BCZY27 milled with 4mol% ZnO and sintered at 1400°C for 4h. X-ray diffraction analysis of the BCZY27 ceramics sintered at 1400°C confirmed the presence of BaCe0.2Zr0.7Y0.1O3-δ and Y0.4Ce0.6O1.8 phases. The incorporation of Zn into perovskite lattice leads to the secondary phase formation. SEM and EDS analyses confirmed the presence of Y0.4Ce0.6O1.8 phase. The sintering was assisted by BaO-ZnO eutectic, which was reflected by the increase of activation energy values for grain boundary conduction. The milling processing did not affect the conductivity properties. The obtained BCZY27 dense sample has conductivity of 7.60 × 10−3 S/cm at 500°C. |
| first_indexed | 2024-12-17T23:03:03Z |
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| issn | 1820-6131 2406-1034 |
| language | English |
| last_indexed | 2024-12-17T23:03:03Z |
| publishDate | 2021-09-01 |
| publisher | University of Novi Sad |
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| series | Processing and Application of Ceramics |
| spelling | doaj.art-fdfca0589a3c4a9eaee616f45688e3fa2022-12-21T21:29:21ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61312406-10342021-09-0115328829610.2298/PAC2103288OInfluence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramicsOuba Ana Kaori de Oliveira0Chinelatto Adilson Luiz1Grzebielucka Edson Cezar2Ramos Kethlinn3Borcezi Janaina Semanech4Chinelatto Adriana Scoton Antonio5PPGECM - Postgraduate Program in Engineering and Materials Science, Department of Materials Engineering, UEPG - State University of Ponta Grossa, Ponta Grossa/PR, BrazilPPGECM - Postgraduate Program in Engineering and Materials Science, Department of Materials Engineering, UEPG - State University of Ponta Grossa, Ponta Grossa/PR, BrazilPPGECM - Postgraduate Program in Engineering and Materials Science, Department of Materials Engineering, UEPG - State University of Ponta Grossa, Ponta Grossa/PR, BrazilPPGECM - Postgraduate Program in Engineering and Materials Science, Department of Materials Engineering, UEPG - State University of Ponta Grossa, Ponta Grossa/PR, BrazilPPGECM - Postgraduate Program in Engineering and Materials Science, Department of Materials Engineering, UEPG - State University of Ponta Grossa, Ponta Grossa/PR, BrazilPPGECM - Postgraduate Program in Engineering and Materials Science, Department of Materials Engineering, UEPG - State University of Ponta Grossa, Ponta Grossa/PR, BrazilPrecursor powders for BaCe0.2Zr0.7Y0.1O3-δ(BCZY27) ceramics were synthesized by a modified Pechinimethod and calcined at 900°C for 12 h. The calcined BCZY27 powders were milled in eccentric and in high energy mill with the addition of 2 and 4mol% ZnO as sintering aid. The effects of milling and sintering aids on the sinterability and electrical conductivity were studied. The linear shrinkage in thermomechanical analyses started at 1050°C for the BCZY27 with 4mol% ZnO processed in eccentric mill. Theoretical density above of 90%TD was obtained for the BCZY27 milled with 4mol% ZnO and sintered at 1400°C for 4h. X-ray diffraction analysis of the BCZY27 ceramics sintered at 1400°C confirmed the presence of BaCe0.2Zr0.7Y0.1O3-δ and Y0.4Ce0.6O1.8 phases. The incorporation of Zn into perovskite lattice leads to the secondary phase formation. SEM and EDS analyses confirmed the presence of Y0.4Ce0.6O1.8 phase. The sintering was assisted by BaO-ZnO eutectic, which was reflected by the increase of activation energy values for grain boundary conduction. The milling processing did not affect the conductivity properties. The obtained BCZY27 dense sample has conductivity of 7.60 × 10−3 S/cm at 500°C.http://www.doiserbia.nb.rs/img/doi/1820-6131/2021/1820-61312103288O.pdfperovskitewet-chemical synthesiselectrical conductivityimpedance spectroscopyfuel cells |
| spellingShingle | Ouba Ana Kaori de Oliveira Chinelatto Adilson Luiz Grzebielucka Edson Cezar Ramos Kethlinn Borcezi Janaina Semanech Chinelatto Adriana Scoton Antonio Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics Processing and Application of Ceramics perovskite wet-chemical synthesis electrical conductivity impedance spectroscopy fuel cells |
| title | Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics |
| title_full | Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics |
| title_fullStr | Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics |
| title_full_unstemmed | Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics |
| title_short | Influence of ZnO addition and milling process on structure and conductivity of BaCe0.2Zr0.7Y0.1O3-δ ceramics |
| title_sort | influence of zno addition and milling process on structure and conductivity of bace0 2zr0 7y0 1o3 δ ceramics |
| topic | perovskite wet-chemical synthesis electrical conductivity impedance spectroscopy fuel cells |
| url | http://www.doiserbia.nb.rs/img/doi/1820-6131/2021/1820-61312103288O.pdf |
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