LI Wei (1995-), male, Master candidate. E-mail: 624199755@qq.com
Na0.5Bi4.5-x(Sm0.5Ce0.5)xTi4O15 (NBT-x(Sm, Ce) bismuth-layered lead-free piezoelectric ceramics were fabricated by a solid-state synthesis method, and the influence of (Sm0.5Ce0.5)3+ additive on the structure and electrical/photoluminescence properties of samples was investigated. For the ceramics modified by (Sm0.5Ce0.5)3+ dopants, the phase structure and microstructure have little changes. The electrical properties of ceramics are enhanced. As x=0.008, the remnant polarization 2Pr reaches 13.33 μC/cm2, and a high Curitemperature TC is 640 ℃. After (Sm0.5Ce0.5)3+ doping, the ceramics show a bright orange photoluminescence. The more intense emission band at 597 nm appears under an excitation at 407 nm, corresponding to the 4G5/2→6H7/2 energy level transition. As a multifunctional material, (Sm0.5Ce0.5)3+-modified NBT piezoelectric ceramics have promising application prospects in optoelectronic devices, sensors, etc..
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |