Optical transmittance and energy storage properties of potassium sodium niobate glass-ceramics |
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| Affiliation: | 1. Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi’an 710021, PR China;2. Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, PR China;1. Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8550, Japan;2. Laboratory for Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo 152-8550, Japan;1. IRCER Laboratory, UMR CNRS 7315, Université de Limoges, Limoges, France;2. ArcelorMittal Global Research and Development, Maizières-lès-Metz, France;3. ITASCA Consultants S.A.S., Lyon, France;4. PPRIME Institute, UPR CNRS 3346, Université de Poitiers, Chasseneuil, France;1. National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha 410083, China;2. Advanced Research Center, Central South University, Changsha 410083, China;1. National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, China;2. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;4. School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China;1. State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;2. Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou 510640, China;3. College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | In this work, 0.8(K2O-Na2O-2Nb2O5)?0.2((1-x)B2O3-xP2O5) (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) glass-ceramics have been fabricated. The effects of P2O5 on the microstructure and properties of the glass-ceramics were comprehensively studied. The addition of P2O5 promotes the transition of the glass network structure from a negatively charged [B?4]- tetrahedron to an electrically neutral [BP?4] tetrahedron. With the increase of P2O5 content, the formation of K2B4O7 is inhibited, with major phase of Na0.9K0.1NbO3 and minor phase of K2B4O7. It is found that the band gap width of the glass-ceramics increases from 3.34 eV to 3.52 eV firstly and then decreases to 3.43 eV. The grain size of the glass-ceramics decreases from 150 nm to 50 nm. High optical transmittance (63%), large discharge energy density (4.58 J/cm3) and large energy storage efficiency (98%) have been simultaneously obtained for K2O-Na2O-Nb2O5-B2O3-P2O5 glass-ceramics, which are potential for the applications of the transparent pulse capacitors. |
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| Keywords: | Glass network structure Glass-ceramics Optical transmittance Charge-discharge |
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