Preparing high purity λ-Ti3O5 and Li/λ-Ti3O5 as high-performance electromagnetic wave absorbers. Issue 25 (11th June 2021)

• Record Type: Journal Article
• Authors: Fu, Xiankai; Chen, Wanqi; Hao, Xiaowen; Zhang, Zhimin; Tang, Ruolan; Yang, Bo; Zhao, Xiang; Zuo, Liang
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 25(2021)
• Page Start: 7976
• Page End: 7981
• Publication Date: 2021-06-11
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc01331a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : The states of the micro-electric field will be changed by the structure control. Li doping can improve the microwave absorption properties of λ-Ti3 O5 . Abstract : This paper reports a new candidate material λ-Ti3 O5 for microwave absorption. λ-Ti3 O5 has been proposed to be metastable and has emerged at room temperature only in the form of nanocrystals. To prepare high purity λ-Ti3 O5, the formation energies of 27 different elements doped into λ-Ti3 O5 were calculated by first-principles from the energy point of view. It was found that Li has the strongest stabilizing effect on λ-Ti3 O5 . The prepared λ-Ti3 O5 and Li/λ-Ti3 O5 show good microwave absorption properties: the efficient absorption bandwidth of λ-Ti3 O5 can reach 7.9 GHz at 1.7 mm thickness, and the efficient absorption bandwidth of Li/λ-Ti3 O5 can reach 7.4 GHz at 1.2 mm thickness. In addition, we propose a strategy of using the number of states of the micro-electric field to predict the microwave absorption properties of materials, which is helpful to the understanding of the origin and development of microwave absorption.