A compromise between piezoelectricity and transparency in KNN-based ceramics: The dual functions of Li2O addition |
| |
| Affiliation: | 1. Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, 710062, Shaanxi, China;2. Key Laboratory of Inorganic Function Material and Device, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an, 710049, China;1. Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, Shaanxi, China;2. School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, Shaanxi, China;3. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, Shaanxi, China;1. Key Laboratory of Functional Material Processing and Application, School of Chemical and Meterials Engineering, Chaohu University, Hefei 238000, China;2. School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Shanghai Institute for Materials Genome, Shanghai, China;3. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;4. The Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;1. College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China;2. Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China;3. Department of Microelectronic Science and Engineering, Ningbo University, Ningbo 315211, China;4. Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China |
| |
| Abstract: | Transparent ceramics with good electrical performance have recently drawn broad interest as promising multifunctional materials. Here, we report that a superior transmittance (T = 75 % at 2000 nm) and good piezoelectricity (d33 ∼ 150 pC/N) can be simultaneously realized in 0.93K0.5Na0.5NbO3-0.07SrZrO3 (KNN-SZ) ceramics by Li2O regulation. The effect of Li2O regulation has two parts: first, the presence of Li2O facilitates the grain growth of KNN-SZ, considering that it melts at a relatively low temperature as a proper sintering aid; second, the introduced Li+ causes local lattice distortion, resulting in the coexistence of orthogonal and tetragonal (O–T) phases. The enlarged grains reduce the light scattering by grain boundaries for a higher optical transmittance; meanwhile, large grains stand as a prerequisite for the macroscopic domain structure favoured for decent piezoelectricity, which could also be partly caused by the coexistence of O–T phases. We believe that these findings might make KNN-based ceramics a preferable candidate for optoelectronic devices. |
| |
| Keywords: | Transparent ceramics Piezoelectric properties Grain size Grain boundary Transmittance |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
