Structural, optical and conductivity properties in tetragonal BaTi1-xCoxO3 (0≤ x ≤0.1)

被引:12
|
作者
Phong, L. T. H. [1 ]
Dang, N. T. [2 ,3 ]
Dang, N., V [4 ,9 ]
Van-Quynh Nguyen [5 ]
Manh, D. H. [1 ]
Nam, P. H. [1 ,6 ]
Nguyen, L. H. [7 ,8 ]
Phong, P. T. [7 ,8 ]
机构
[1] Vietnam Acad Sci & Technol, Inst Mat Sci, Hanoi, Vietnam
[2] Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam
[3] Duy Tan Univ, Fac Nat Sci, Da Nang 550000, Vietnam
[4] Thai Nguyen Univ Sci, Dept Phys & Technol, Thai Nguyen City, Vietnam
[5] Vietnam Acad Sci & Technol, Univ Sci & Technol Hanoi USTH, Hanoi, Vietnam
[6] Vietnam Acad Sci & Technol, Grad Univ Sci & Technol, Hanoi, Vietnam
[7] Van Lang Univ, Sci & Technol Adv Inst, Lab Magnetism & Magnet Mat, Ho Chi Minh City, Vietnam
[8] Van Lang Univ, Fac Technol, Ho Chi Minh City, Vietnam
[9] Hong Duc Univ, Thanh Hoa, Vietnam
关键词
ELECTRICAL-PROPERTIES; DIELECTRIC-PROPERTIES; BARIUM-TITANATE; AC CONDUCTION; BATIO3; CO; CHALCOGENIDE; DIFFRACTION; CERAMICS; SIZE;
D O I
10.1039/d2ra01411d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
This work investigates the structure, optical and electrical conductivity properties of BaTi1-xCoxO3 (0 <= x <= 0.1) ceramics prepared by the hydrothermal method. The X-ray diffraction and Raman scattering analysis demonstrates that the prepared samples have a single-phase tetragonal structure with P4mm symmetry. The UV-vis diffuse reflectance spectrum confirms the influence of Co concentration on the direct optical band gap of BaTi1-xCoxO3 ceramics. The optical band gap shifts from 3.14 eV to 3.44 eV as the Co concentration increases from 0 to 0.1. The dielectric constant increases with the depletion of frequency according to the Maxwell-Wagner and Koops model. The AC conductivity versus frequency curve indicates that the conduction mechanism is determined by using the correlated barrier hopping (CBH) model. The Cole-Cole plot of the complex impedance was investigated for the prepared samples. The compounds showed dielectric relaxation of the non-Debye type.
引用
收藏
页码:16119 / 16130
页数:12
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