ZHNAG Xuejian (1975-), male, Professor. E-mail: zxj_0620@163.com
Tm- and Ho- codoped yttrium aluminum garnet (YAG) nanopowders were prepared by the sol-gel method, and a transparent ceramic was prepared from the obtained powders. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and fluorescence spectroscopy were used to analyze the synthesized nanopowders and transparent ceramic. The results show that after calcination at 900 ℃, the nanopowders formed the crystal phase of YAG, and the characteristic peaks in the range of 785 to 398 cm-1 correspond to vibrations of the unique lattice of YAG. After preparing the transparent ceramic, a compact structure was achieved. In the range of 1.97-2.03 μm, the transmittance was greater than 84%. After excitation by a 780 nm pumped light source, stable laser emission at a wavelength of 2.03 μm was produced.
| 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 |