La2Zr2O7 based high entropy ceramic with a low thermal conductivity and enhanced CMAS corrosion resistance |
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| Affiliation: | 1. Sate Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;2. Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Sichuan University, Chengdu, 610213, China;1. Department of Neutron Physics, Czech Academy of Sciences, Nuclear Physics Institute, Husinec-Řež, čp. 130, 250 68 Řež, Czech Republic;2. Department of Physics, Faculty of Science, J.E. Purkyně University, Pasteurova 3544/1, 400 96, Ústi Nad Labem, Czech Republic;3. Department of Inorganic Chemistry, University of Chemistry and Technology in Prague, 166 28, Prague, Czech Republic;4. Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 2026/5, 121 16, Prague 2, Czech Republic;5. Institute of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 61137, Brno, Czech Republic;6. Department of Material Analysis, FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21, Prague, Czech Republic;1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China;2. Institut Des Sciences Chimiques de Rennes UMR 6226, CNRS, Université de Rennes 1, Rennes, 35042, France;1. Laboratório de Materiais Vítreos, Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, 13565-905, São Carlos, SP, Brazil;2. Laboratório de Hematologia e Células-tronco, Faculdade de Farmácia, Universidade Federal Do Rio Grande Do Sul, 90610-000, Porto Alegre, RS, Brazil;3. Universidade Federal de Ciências da Saúde de Porto Alegre, 90050-170, Porto Alegre, RS, Brazil;4. Instituto de Pesquisa Com Células-tronco, 90020-010, Porto Alegre, RS, Brazil;5. Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Universidade Estadual Paulista Júlio de Mesquita Filho, 16015-050, Araçatuba, SP, Brazil;6. Laboratório de Ensaios Antimicrobianos, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, 38400-902, Uberlândia, MG, Brazil;1. Department of Physics, National Kaohsiung Normal University, Kaohsiung, 824, Taiwan;2. Department of Resources Engineering, National Cheng Kung University, Tainan, 70101, Taiwan |
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| Abstract: | Herein, five new La2Zr2O7 based high-entropy ceramic materials, such as (La0.2Ce0.2Gd0.2Y0.2Er0.2)2Zr2O7, (La0.2Ce0.2Gd0.2Er0.2Sm0.2)2Zr2O7, (La0.2Gd0.2Y0.2Er0.2Sm0.2)2Zr2O7, (La0.2Ce0.2Y0.2Er0.2Sm0.2)2Zr2O7, (La0.2Ce0.2Gd0.2Y0.2Sm0.2)2Zr2O7), were synthesized using a sol-gel and high-temperature sintering (1000 °C) method. The spark plasma sintered (SPS) (La0.2Ce0.2Gd0.2Er0.2Sm0.2)2Zr2O7 pellet shows a low thermal conductivity of 1.33 W m-1 K-1 at 773 K, and it also exhibits better CaO–MgO–Al2O3–SiO2 corrosion resistance than that of Y2O3 stabilized ZrO2. It shows that (La0.2Ce0.2Gd0.2Er0.2Sm0.2)2Zr2O7 has a promising application potential as a thermal barrier coating. |
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| Keywords: | High-entropy Ceramic oxide Thermal insulation Anti-corrosion Thermal barrier coatings |
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