Gao Chenbo, Xu Pengfei, Ruan Fei, Yang Chenyu
School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014000, China.
Materials (Basel). 2022 Mar 4;15(5):1905. doi: 10.3390/ma15051905.
This study provides a novel method to prepare metal-ceramic composites from magnetically selected iron ore using microwave heating. By introducing three different microwave susceptors (activated carbon, SiC, and a mixture of activated carbon and SiC) during the microwave process, effective control of the ratio of metallic and ceramic phases was achieved easily. The effects of the three susceptors on the microstructure of the metal-ceramics and the related reaction mechanisms were also investigated in detail. The results show that the metal phase (Fe) and ceramic phase (FeSiO, FeAlO) can be maintained, but the metal phase to ceramic phase changed significantly. In particular, the microstructures appeared as well-distributed nanosheet structures with diameters of ~400 nm and thicknesses of ~20 nm when SiC was used as the microwave susceptor.
本研究提供了一种利用微波加热从磁选铁矿石制备金属陶瓷复合材料的新方法。通过在微波过程中引入三种不同的微波吸收体（活性炭、碳化硅以及活性炭与碳化硅的混合物），能够轻松有效地控制金属相和陶瓷相的比例。还详细研究了这三种吸收体对金属陶瓷微观结构及相关反应机理的影响。结果表明，可以保持金属相（Fe）和陶瓷相（FeSiO、FeAlO），但金属相和陶瓷相的比例发生了显著变化。特别是，当使用碳化硅作为微波吸收体时，微观结构呈现出直径约400纳米、厚度约20纳米的分布均匀的纳米片状结构。
