CHEN Guangyao(1987-), Male, Ph.D., Lecturer. E-mail: cgybless1@shu.edu.cn
A strontium zirconate oxide refractory was prepared by a solid-state reaction method at a mole ratio n(SrO): n(ZrO2) of 2∶1 and 1 400℃, and Ti2Ni alloys were melted in a crucible at 1 750℃. The phase composition and microstructure of the refractory as well as the key features of Ti2Ni alloy melt interacted with the refractory crucible were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical microscopy (OM). The results reveal that the crucible refractory is consisted with the phases of Sr2ZrO4, Sr3Zr2O7 and SrO, respectively. The thermodynamically stable phase Sr2ZrO4 is unable to obtain separately due to the limitation of the reaction between SrCO3 and ZrO2, causing the residues of Sr3Zr2O7 and SrO. The thickness of interaction layer for the strontium zirconate oxide and barium zirconate crucible are 1 250 μm and 2 120 μm, respectively. The oxygen concentrations of the alloy after melting in strontium zirconate oxide and barium zirconate crucible are 0.332% and 0.566% (in mass fraction), respectively. It is indicated that the strontium zirconate oxide refractory exhibits a superior stability, compared to the barium zirconate refractory.
| 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 |