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Taking SiCl4 as the precursor and the mixtures of hydrogen and oxygen as the explosion source, the influence on the product was investigated by changing the relative molecular mass of precursor. Through X-ray fluorescence (XRF), X-ray diffraction (XRD) and transmission electron microscopy (TEM), the structure, composition and size distribution of the detonation product were characterized and analyzed. The XRF characterization shows that the obtained product is mainly SiO2 and this product purity is above 99.9%. The XRD characterization indicateds that the nano-SiO2 powder belongs to the typical amorphous structure. The TEM images show that with the increasing of the relative molecular mass of precursor, the product were bonding gradually and its dispersion was reduced. The relative mole ratio of precursors should be controlled within 1.5.
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| 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 |
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