基于介孔粉体原位增加烧结驱动力实现低温制备高性能陶瓷及应用探索

采用超细纳米粉体为原料是目前制备精细陶瓷最为常见的方法，但是仍然面临着无法实现粒径小、粒径分布窄、无团聚纳米粉体大规模制备的难题。因此，探索新的高活性原料粉体，通过低温烧结实现微结构与性能调控，最终制备出高性能陶瓷材料，具有重要的研究意义和应用价值。. 本项目提出了首先设计合成不同微结构Al2O3、Y2O3等介孔粉体，然后系统研究介孔粉体的孔径大小、孔道分布和比表面积等微结构特征对烧结活性的影响，制备出适合烧结的高烧结活性介孔粉体，阐明烧结过程中介孔孔道坍塌原位增加烧结驱动力的烧结致密化机理，利用低温烧结实现微结构与性能调控。最后开展介孔粉体复合YAG:Ce荧光粉低温烧结制备荧光陶瓷的功能应用探索。通过本项目的研究，为低温制备微结构与性能可控的陶瓷材料探索一条新途径。

Fine ceramics was prepared usually using nano-sized powders as starting materials. However, it is still difficult to mass produce nano-sized powders with small particle size, narrow diameter distribution and free-agglomeration. Thus, it is very significative to investigate these powders with high sintering activity and prepare fine ceramics.. At first, micron-sized mesoporous powders including Y2O3, Al2O3 with different microstructure are synthesized and the effect of pore size, channel distribution, specific area on sintering behaviour is studied in detail. Then, in-situ increasement of sintering driving force deriving from will be revealed. Finally, fluorescent ceramics will be prepared from the mixture of mesoporous and YAG:Ce powders. The purposes of the project is developed a new route to prepare fine ceramics with high performance.