The phase stability and thermophysical properties of InFeO3(ZnO)m (m = 2, 3, 4, 5) |
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| Affiliation: | 1. School of Materials Science and Engineering, Beihang University, Xueyuan Road, No. 37, Beijing 100191, China;2. LEMHE, ICMMO, University Paris-Sud & CNRS, Orsay F-91405, France;1. Instituto de Cerámica y Vidrio, CSIC, Kelsen 5, 28049 Madrid, Spain;2. Laboratoire des Matériaux Céramiques et Procédés Associés (LMCPA), Université Lille-Nord de France, F-5900 Lille, France;3. UVHC, ZI du Champ de l’Abbesse, F-59600 Maubeuge, France;1. Departamento de Física, Universidade Federal de Sergipe, 49100-000, São Cristóvão, SE, Brazil;2. Grupo de Nanomateriais Funcionais (GNF), Departamento de Física, Universidade Federal de Sergipe, 49500-000, Itabaiana, SE, Brazil;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People''s Republic of China;2. College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, People’s Republic of China;3. School of Industrial Engineering, Purdue University, West Lafayette, IN 47906, USA;1. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 - box 2450, Leuven, 3001, Belgium;2. Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200d - box 2414, Leuven, 3001, Belgium |
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| Abstract: | The phase stability and thermophysical properties of InFeO3(ZnO)m (m = 2, 3, 4, 5) compounds were investigated, which are a general family of homologous layered compounds with general formula InFeO3(ZnO)m (m = 1–19). InFeO3(ZnO)m (m = 2, 3, 4, 5) ceramics were synthesized using cold pressing followed by solid-state sintering. They revealed an excellent thermal stability after annealing at 1450 °C for 48 h. No phase transformation occurred during heating to 1400 °C. InFeO3(ZnO)3 exhibited a thermal conductivity of 1.38 W m?1 K?1 at 1000 °C, which is about 30% lower than that of 8 wt.% yttria stabilized zirconia (8YSZ) thermal barrier coatings. The thermal expansion coefficients (TECs) of InFeO3(ZnO)m bulk ceramics were in a range of (10.97 ± 0.33) × 10?6 K?1 to (11.46 ± 0.35) × 10?6 K?1 at 900 °C, which are comparable to those of 8YSZ ceramics. |
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| Keywords: | Thermal barrier coatings (TBCs) Phase stability Thermal conductivity Thermal expansion coefficients (TECs) |
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