NASICON-type Li1.3Al0.3Ti1.7(PO4)3 ceramics with frequency dispersion effect and microwave absorption properties in 8.2–12.4 GHz

This work aimed to develop NASICON-type Li1.3Al0.3Ti1.7(PO4)3 (LATP) ceramic as a new type of high-temperature microwave absorption material. LATP ceramics were prepared by traditional solid-state reaction with sintering temperature ranging from 950 to 1100 °C for phase, microstructure, conductivity, dielectric property, and microwave absorption property study. Moreover, the dielectric property and microwave absorption property of LATP ceramic and NASICON-type Na3Zr2Si2PO12 (NZSP) ceramic in our previous work were compared. Results showed that LATP ceramic sintered at 1050 °C exhibited the highest conductivity of 2.43 × 10–4 S cm−1 and optimal microwave absorption property. The minimum reflection loss (RLmin) was − 13.4 dB at 11.14 GHz and the bandwidth (RL