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Poly(N-isopropylacrylamide) assisted microwave synthesis of magnesium aluminate spinel oxide for production of highly transparent films by hot compression
Affiliation:1. UVHC, LMCPA EA 2443, F-59313 Valenciennes, France;2. Univ. Lille Nord de France, F-59000 Lille, France;3. ONERA Lille, F-59045 Lille, France;1. Department of Energy Conversion and Storage, Technical University of Denmark – DTU, Frederiksborgvej 399, DK-4000 Roskilde, Denmark;2. Swiss Light Source, Paul Scherrer Institut (PSI), 5232 Villigen PSI, Switzerland;1. Key Laboratory of Functional Materials and Devices for Special Environments of CAS; Xinjiang Key Laboratory of Electronic Information Materials and Devices; Xinjiang Technical Institute of Physics & Chemistry of CAS, Urumqi 830011, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Kazuo Inamori School of Engineering, New York State College of Ceramics at Alfred University, Alfred, NY 14802, USA;1. Fundación ITMA, Parque Tecnológico de Asturias, 33428 Llanera, Asturias, Spain;2. Department of Nanostructured Materials, Centro de Investigación en Nanomateriales y Nanotecnología (CINN), Principado de Asturias – Consejo superior de Investigaciones Científicas (CSIC) – Universidad de Oviedo (UO), Parque Tecnológico de Asturias, 33428 Llanera, Asturias, Spain;1. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China;2. Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, China;3. China Zhenhua Group Yunke Electronic Co., LTD, China
Abstract:Magnesium aluminate spinel oxides have been prepared via poly(N-isopropylacrylamide) assisted microwave technique. The prepared MgAl2O4 powders showed a crystalline cubic structure with spinel phase after calcination at 600 °C only. The poly(N-isopropylacrylamide) amount showed a high effect on the crystallite size and the densification behavior of MgAl2O4. The increase of the amount of poly(N-isopropylacrylamide) reduced the sintering temperature of MgAl2O4 from 1400 °C to 1050 °C. The hot-pressed of MgAl2O4 powders in the presence of 3 wt% of poly(N-isopropylacrylamide) exhibited a full density at sintering temperature 1100 °C in 15 min only. The sintered films showed high transparency (81 ± 2%) in the wavelength range 500–1000 nm.
Keywords:X-ray techniques  SEM  Crystal structure  Nanoparticles  Spinel  Transparent ceramic
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