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Outline
In this study，alumina powder is used as the matrix material，and two organic alumina precursors with different room-temperature phases （solid-phase and liquid-phase） are selected as sintering aids，and the solid-state sintering process is adopted. To explore the regulatory effect of the precursors on the sintering temperature of alumina ceramics，controlled experiments are designed with sintering temperature，precursor type，and additive content as key variables. Through physical and chemical property characterization and mechanical performance testing of samples in each group，the sample performance under different process conditions is systematically evaluated. The results show that both solid-phase and liquid-phase organic alumina precursors can significantly reduce the sintering temperature of alumina ceramics，and the optimal additive amounts of the two precursors vary at different sintering temperatures. Within the temperature range of 1200-1400 ℃，the optimal additive amount of both precursors is the same，which is 6%. When the sintering temperature increases to 1500 ℃，the optimal additive amount of the solid-phase precursor decreases to 2%，while that of the liquid-phase precursor increases to 10%. This work provides experimental basis for the optimization of low-temperature sintering process and parameter selection of alumina ceramics，and has reference value for promoting their efficient preparation.
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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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