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Electrical properties of reduced 3YTZP ceramics consolidated by spark plasma sintering
Affiliation:1. Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Américo Vespucio 49, 41092 Sevilla, Spain;2. Departamento de Física de la Materia Condensada, Universidad de Sevilla, Apdo. 1065, 41080 Sevilla, Spain;1. GRIFO, Dpto. Electrónica, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain;2. Instituto de Óptica, CSIC, C/Serrano 144, 28006 Madrid, Spain;1. School of Mathematics and Systems Science, Shenyang Normal University, Shenyang, Liaoning 110034, People''s Republic of China;2. Department of Industrial Engineering and Management, Nan Kai University of Technology, Nantou, Taiwan;3. Department of Healthcare Management, Yuanpei University, Hsinchu, Taiwan;4. Graduate Institute of Business Administration Cheng Shiu University, Kaohsiung, Taiwan;5. Department of Statistics, Feng Chia University, Taichung, Taiwan;1. Department of Signal Theory and Communications, Carlos III University, Leganés (Madrid), Spain;2. Instituto de Óptica, Consejo Superior de Investigaciones Científicas, Madrid, Spain;1. Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, China;2. Department of Pathology, School of basic medicine, Central South University, Changsha, Hunan 410078, China;3. Cancer Research Institute, Central South University, Changsha, Hunan 410078 China;4. Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Hunan 410078 China;5. Key Laboratory of Carcinogenesis, National Health and Family Planning Commission, Hunan 410078 China;6. Changzhi School of Medicine, Changzhi, Shanxi 046000, China;7. Center for Medicine Research, Xiangya Hospital, Central South University, Changsha, Hunan 410008 China
Abstract:3 mol% Yttria doped zirconia ceramics were consolidated by spark plasma sintering (SPS) at two sintering temperatures with the aim of achieving two different reduction levels. Microstructural characterization of the ceramics was performed by scanning electron microscopy (SEM). Electrical properties were investigated by means of impedance spectroscopy from room temperature up to 500 °C. The two ceramics presented a remarkably different electrical behavior. The effect of the extra electrons introduced by reduction during SPS on both the bulk and the grain boundary conductivity was analyzed and discussed.
Keywords:Zirconia  Spark plasma sintering  Impedance spectroscopy  Electrical conductivity
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