Benavente Rut, Salvador María Dolores, Centeno Alba, Alonso Beatriz, Zurutuza Amaia, Borrell Amparo
Instituto de Tecnología de Materiales, Universitat Politècnica de València, Camino de Vera, s/n, 46022 Valencia, Spain.
Graphenea S.A. Paseo Mikeletegi, 83, 20009 San Sebastián, Guipúzcoa, Spain.
Materials (Basel). 2020 Mar 3;13(5):1119. doi: 10.3390/ma13051119.
The choice of the right material is essential in microwave processing. The carbon materials are good microwave absorbers, which allows them to be transformed by microwave heating into new carbon materials with adapted properties, capable of heating other materials indirectly. In this paper, the microwave heating of graphene as reinforcement of the lithium aluminosilicate (LAS) ceramics has been explored. LAS ceramics have a near-zero coefficient of thermal expansion and exhibit an effective and efficient heating by microwave. Nevertheless, we have found that the graphene did not show any significant response to the microwave radiation and, hence, the interaction as mechanical reinforcement with the LAS material is harmful. The possible benefits of graphene materials to microwave technology are widely known; however, the mechanism involved in the interaction of microwave radiation with ceramic-graphene composites with high dielectric loss factors has not been addressed earlier.
在微波处理中，选择合适的材料至关重要。碳材料是良好的微波吸收体，这使得它们能够通过微波加热转化为具有适配性能的新型碳材料，进而能够间接加热其他材料。本文探讨了将石墨烯作为锂铝硅酸盐（LAS）陶瓷增强体的微波加热情况。LAS陶瓷的热膨胀系数近乎为零，并且通过微波能够实现有效且高效的加热。然而，我们发现石墨烯对微波辐射并未表现出任何显著响应，因此，其作为与LAS材料的机械增强体的相互作用是有害的。石墨烯材料对微波技术可能带来的益处广为人知；然而，此前尚未探讨过微波辐射与具有高介电损耗因子的陶瓷 - 石墨烯复合材料相互作用所涉及的机制。
