High purity λ-Ti3O5 prepared by Sc doping for enhanced microwave absorption

Abstract

Metallic λ-Ti₃O₅ is a kind of metal oxide with a special electronic structure. It has attracted wide attention due to its excellent optical properties, magnetoelectric properties, and phase transition characteristics. However, the preparation of single-phase Ti₃O₅ and the regulation of the microwave response remain challenges. In this paper, a simple process for the synthesis of high purity single-phase λ-Ti₃O₅ doped with Sc element is reported, which improves the dielectric loss of Ti₃O₅. The porous structure of Sc-doped Ti₃O₅ is capable of meeting the need for light weight and enhancing its attenuation characteristics. It shows an enhanced microwave response with a maximum effective absorption bandwidth of 7.2 GHz, and a reflection loss of −50.4 GHz. This study not only develops a new microwave absorbing material, but also reveals the influence of doping on the phase and electromagnetic absorption properties. This could lead to a new approach to designing new single-phase porous oxide microwave absorbers.