Divalent-Doped Li1.3Al0.3Ti1.7(PO4)3 Ceramics with Enhanced Microwave Absorption Properties in the X-band

Studies about microwave absorption properties of Li1.3Al0.3Ti1.7(PO4)(3) (LATP) ceramics are rare, so this work attempted to develop them as high-temperature, light weight microwave absorbing material. Li1.34Al0.26M0.04Ti1.7(PO4)(3) (M=Co, Mg, Ni) and Li1.3+xAl0.3-xMgxTi1.7(PO4)(3) (x = 0, 0.04, 0.08, 0.12) ceramics were prepared and analyzed for their microstructure, phase, conductivity, dielectric properties and microwave absorption properties. Results showed that both the doping ion and doping content had significant effects on the conductivity of LATP ceramics. Li1.34Al0.26Co0.04Ti1.7(PO4)(3) ceramics had the highest conductivity of 1.18 x 10(-3)S center dot cm(-1). The dielectric properties and microwave absorption properties among Li1.34Al0.26M0.04Ti1.7(PO4)(3) (M=Co, Mg, Ni) ceramics are similar. Their bandwidth covered the entire X-band in 2.2 mm and the minimum reflection loss (RLmin) reached - 20.2 dB. The complex permittivity decreased and the microwave absorption property became worse as the doping content of Li1.3+xAl0.3-xMgxTi1.7(PO4)(3) ceramics increased from 0.04 mol to 0.12 mol.