纳米三氧化二铝对陶瓷烧结温度的影响

采用在普通陶瓷坯料上涂抹一层纳米三氧化二铝的方法进行分组烧结试验。利用纳米颗粒的奇异特性提高坯料表面的扩散速率,降低烧结温度,提升烧结产物的致密化程度。实验中通过控制纳米添加剂的剂量以及工艺优化,取得最佳的增强、增韧效果。运用SME、XRD等检测手段分析不同晶型、不同形貌的纳米氧化铝对烧结温度的降低程度以及力学性能的改善状况,为陶瓷制备提供实验数据储备。实验结果表明:在陶瓷坯料表面涂抹纳米三氧化二铝涂层既可节省纳米材料又能大幅度降低烧结温度,是提高力学性能的行之有效的措施。

The Effect of Nano-Al2O3 on Sintering Temperature of A Ceramic

In the present research, sintering experiments are made in different groups by painting a layer of Nano-Al2O3 on ordinary ceramic billet. With the singular properties of nanoparticles, it can enhance the diffusion rate on the surface of billet, reduce the sintering temperature and improve the level of densification of sintering product. The experiment achieves the best result of reinforcing and toughening by controlling the nanometer additive dosage and process optimization. With the advanced detection means, such as SME, XRD and so on, it analyses the reduced level of the sintering temperature and the improvements of mechanical properties with Nano-Al2O3 in different crystal morphology. It can provide the experimental data reserve to ceramic preparation. The results show that painting a layer of Nano-Al2O3 on ordinary ceramic billet is an effective measure to reduce the sintering temperature and improve the mechanical properties.