标题：Annealing effects on the structural and dielectric properties of (Nb plus In) co-doped rutile TiO2 ceramics
作者：Zhao, Lanling; Wang, Jun; Gai, Zhigang; Li, Jichao; Liu, Jian; Wang, Jiyang; Wang, Chunlei; Wang, Xiaolin
作者机构：[Zhao, Lanling; Gai, Zhigang; Li, Jichao; Liu, Jian; Wang, Chunlei] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, People 更多
通讯作者：Wang, Chunlei;Wang, CL;Wang, XL
通讯作者地址：[Wang, CL]Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China;[Wang, XL]Univ Wollongong, Inst Superconducting 更多
摘要：Density functional theory calculations were conducted to investigate the electronic structures of rutile Ti16O32, Ti13Nb2InO32, and Ti13Nb2InO31 systems. High density (Nb + In) co-doped rutile TiO2 ceramics were successfully prepared by one modified solid state method. XRD, XPS, Raman scattering and FT-IR measurements were performed to investigate the structural properties of the (Nb + In) co-doped rutile TiO2 ceramics annealed in different atmospheres. The lattice parameters for the (Nb + In) co-doped rutile TiO2 ceramics were enlarged slightly after they were annealed in air and oxygen. Raman scattering results indicate that the E-g modes are quite sensitive to oxygen vacancy in comparison with the other Raman active modes. The ceramics annealed in oxygen at 873 K exhibit the best dielectric performance with giant dielectric permittivity (>14 000) and small dielectric loss (<0.2) over the frequency range from 40 Hz to 1 MHz.