Effect of crystallization temperature on dielectric and energy-storage properties in SrO-Na2O-Nb2O5-SiO2 glass-ceramics |
| |
| Affiliation: | 1. Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;2. Key laboratory of inorganic nonmetallic crystalline and energy conversion materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang 443002, China;3. School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, China;2. Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA;1. Department of Physics, Inha University, Incheon 402-751, Korea;2. Department of Physics, Ewha Womans University, Seoul 120-750, Korea;3. Division of Nano Sciences and Department of Physics, Ewha Womans University, Seoul 120-750, Korea;1. Dep. Chimie, Faculté des Sciences, Université de Monastir, 5019 Monastir, Tunisia;2. Dep. Química Inorgánica I, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain;1. Key Laboratory of Photovoltaic Materials of Henan Province, School of Physics & Electronics, Henan University, Kaifeng 475004, PR China;2. Institute of Physics for Microsystems, School of Physics & Electronics, Henan University, Kaifeng 475004, PR China |
| |
| Abstract: | The SrO-Na2O-Nb2O5-SiO2 (SNNS) glass-ceramics were prepared through the melt-quenching combined with the controlled crystallization technique. XRD results showed Sr6Nb10O30, SrNb2O6, NaSr2Nb5O15 with tungsten bronze structure and NaNbO3 with the perovskite structure. With the decrease of crystallization temperature, dielectric constant firstly increased and then decreased, while breakdown strength (BDS) was increased. High BDS of the glass-ceramics is attributed to the dense and uniform microstructure at low crystallization temperature. The optimal dielectric constant of 140±7 at 900 °C and BDS of 2182±129 kV/cm at 750 °C were obtained in SNNS glass-ceramics. The theoretical energy-storage density was significantly improved up to the highest value of 15.2±1.0 J/cm3 at 800 °C, which is about 5 times than that at 950 °C. The discharged efficiency increased from 65.8% at 950 °C to 93.6% at 750 °C under the electric field of 500 kV/cm by decreasing crystallization temperature. |
| |
| Keywords: | Glass-ceramic Breakdown strength Energy-storage density Discharge efficiency |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
