▎ 摘　　要

BaAl2Si2O8 (BAS) glass ceramic powders were prepared by sol gel method. Graphene oxide (GO)/BAS mixture powders were prepared by a simple mixing process of GO and BAS; Dense and uniform reduced graphene oxide (RGO)/BAS composites were fabricated by the hot-pressing of GO/BAS, which was accompanied by the in-situ thermal reduction of GO. Microstructure, phase composition, dielectric and electromagnetic wave (EM) absorption properties of RGO/BAS were investigated. The results reveal that RGO can promote the hexacelsian-to-celsian phase transformation of BAS. In the frequency range from 8 GHz to 12 GHz, the complex permittivity of RGO/BAS increases with increasing RGO content. The composite with 1.5 wt% of RGO shows good EM absorbing ability. When the sample thickness is 2.1 mm, the minimum reflection coefficient (RC) reaches -33 dB, and the effective absorption bandwidth is more than 3.1 GHz. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.