Dynamic Mechanical and Electric Behaviors of La-Doped BiVO4
Lin, He; Zhang, Haitao; He, Xiang; Xu, Wentao; Zhou, Youfu; Yi, Zhiguo
AbstractBismuth vanadate (BiVO4) is an important semiconductor with wide applications, but in-depth understanding of its fundamental dynamic behaviors is still lacking. To address this issue, the comprehensive analysis of structure, internal friction (IF), modulus, dielectric, and impedance spectra was employed to unambiguously disclose the dynamic mechanical and electric behaviors for a series of Bi1-xLaxVO4 ceramics (0 <= x <= 0.15). In sensitive mechanical measurement, five IF peaks, corresponding modulus anomalies and high-temperature creep behavior, have been observed in our Bi1-xLaxVO4 ceramics. Through analyzing their related kinetic parameters, defect formations and evolution processes, the complex evolution model of ferroelastic domains including four different stages, and the origin of grain boundary relaxation are well established. As for the electric experiment, there are two apparently different activation processes in low and high temperature regions, respectively. In conjunction with structural and mechanical characterizations, we confirm that the mixed electric/oxide ionic conduction dominates from 433 to 633 K, undergoing a structural change (633-673 K) to the complicated defect conduction at higher temperatures (673-833 K). Our findings smooth the path for better realization of the fundamental dynamic behaviors as well as extending practical applications of BiVO4-based materials.
WOS Research AreaChemistry ; Crystallography ; Materials Science
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Lin, He,Zhang, Haitao,He, Xiang,et al. Dynamic Mechanical and Electric Behaviors of La-Doped BiVO4[J]. CRYSTAL GROWTH & DESIGN,2019,19(1):275.
APA Lin, He,Zhang, Haitao,He, Xiang,Xu, Wentao,Zhou, Youfu,&Yi, Zhiguo.(2019).Dynamic Mechanical and Electric Behaviors of La-Doped BiVO4.CRYSTAL GROWTH & DESIGN,19(1),275.
MLA Lin, He,et al."Dynamic Mechanical and Electric Behaviors of La-Doped BiVO4".CRYSTAL GROWTH & DESIGN 19.1(2019):275.
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