TAN Xiang (1994-), male, Master candidate E-mail: tx_shawn@163.com
Calcite, quartz and Al2O3 were used as raw materials to prepared anorthite coating, and improving the flexural strength of porcelain tiles via residual surface compressive stress provided by regulating the composition of the coating. The effect of binders, Al2O3 content, modulus of elasticity of coating and the ratio of cross section between coating and substrate were studied on the preparation of coating and improving of flexural strength. The results are as follows: when the Al2O3 content a is 17.5%, 1% PVA is used as binder and the sintering process is kept at 1 200 ℃ for 0.5 h, an anorthite coating with a thickness of about 80 μm can be obtained. The hardness of the samples is 630 kg/mm2 and the flexural strength increased by 72.6%, from (62±3) to (107±4) MPa.
| 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 |