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Outline
Using the conventional solid-state method， high-entropy ceramics with a perovskite structure （Ca0.25Sr0.25Ba0.25Pb0.25）（Zr x Ti1-x ）O3 are prepared. The effects of configurational entropy and annealing heat treatment on the phase composition， microstructure， and thermal conductivity of the ceramics are investigated. The results show that the combined influence of entropy engineering and heat treatment processes results in an increase in the porosity of the ceramics， the precipitation of the PbO nano-second phases with low thermal conductivity， a reduction in the average grain size， and a significant reduction in the thermal conductivity. The structural disorder introduced by the high-entropy composition effectively enhances the stability of the thermal conductivity and imparts glass-like thermal transport characteristics to the ceramics. When x=0.20， the ceramic exhibits optimal thermal insulation performance and thermal conductivity stability， with κ800 ℃=0.89 W·m-1·K-1 and Δκ100-800 ℃=0.07 W·m-1·K-1， providing alternative materials for high-temperature thermal insulation applications.
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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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