Enhanced optical and dielectric properties of rare-earth co-doped SrTiO3 ceramics

2021 ◽  
Author(s):  
Jagabandhu Pradhan ◽  
H. K. Mallick ◽  
M. P. K. Sahoo ◽  
A. K. Pattanaik
Keyword(s):  
Rare Earth ◽  
Dielectric Properties ◽  
Srtio3 Ceramics ◽  
Co Doped

Structures and dielectric properties of (Nb, Zn) co-doped SrTiO3 ceramics at various sintering temperatures

2019 ◽  
Vol 54 (19) ◽  
pp. 12401-12410 ◽  
Author(s):  
Wengao Pan ◽  
Minghe Cao ◽  
Chunli Diao ◽  
Cheng Tao ◽  
Hua Hao ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Srtio3 Ceramics ◽  
Co Doped

scholarly journals The Primary Origin of Excellent Dielectric Properties of (Co, Nb) Co-Doped TiO2 Ceramics: Electron-Pinned Defect Dipoles vs. Internal Barrier Layer Capacitor Effect

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3230
Author(s):  
Theeranuch Nachaithong ◽  
Narong Chanlek ◽  
Pairot Moontragoon ◽  
Prasit Thongbai
Keyword(s):  
Dielectric Properties ◽  
Loss Tangent ◽  
Barrier Layer ◽  
Dielectric Response ◽  
High Resistivity ◽  
Low Loss ◽  
Rutile Tio2 ◽  
Complex Defect ◽  
Very High ◽  
Co Doped

(Co, Nb) co-doped rutile TiO2 (CoNTO) nanoparticles with low dopant concentrations were prepared using a wet chemistry method. A pure rutile TiO2 phase with a dense microstructure and homogeneous dispersion of the dopants was obtained. By co-doping rutile TiO2 with 0.5 at.% (Co, Nb), a very high dielectric permittivity of ε′ » 36,105 and a low loss tangent of tanδ » 0.04 were achieved. The sample–electrode contact and resistive outer-surface layer (surface barrier layer capacitor) have a significant impact on the dielectric response in the CoNTO ceramics. The density functional theory calculation shows that the 2Co atoms are located near the oxygen vacancy, creating a triangle-shaped 2CoVoTi complex defect. On the other hand, the substitution of TiO2 with Nb atoms can form a diamond-shaped 2Nb2Ti complex defect. These two types of complex defects are far away from each other. Therefore, the electron-pinned defect dipoles cannot be considered the primary origins of the dielectric response in the CoNTO ceramics. Impedance spectroscopy shows that the CoNTO ceramics are electrically heterogeneous, comprised of insulating and semiconducting regions. Thus, the dielectric properties of the CoNTO ceramics are attributed to the interfacial polarization at the internal insulating layers with very high resistivity, giving rise to a low loss tangent.

Warm-white luminescence of Dy3+ and Sm3+ co-doped NaSrPO4 phosphors through energy transfer between rare earth ions

2021 ◽  
Author(s):  
Wen Yan ◽  
Junhan Li ◽  
Wentao Zhang ◽  
Xi Gao ◽  
Peicong Zhang
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Rare Earth Ions ◽  
White Luminescence ◽  
Co Doped

Measurement of dielectric properties of rare earth oxides by resonance cavity perturbation method

2021 ◽  
pp. 110362
Author(s):  
Peng Lv ◽  
Liangjing Zhang ◽  
Shiwei Li ◽  
Kaihua Chen ◽  
Jinhui Peng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Dielectric Properties ◽  
Perturbation Method ◽  
Rare Earth Oxides ◽  
Cavity Perturbation ◽  
Resonance Cavity

Tunable emissions via the white region from Sr2Gd8(SiO4)6O2:RE3+ (RE3+: Dy3+, Tm3+, Eu3+) phosphors

2016 ◽  
Vol 40 (7) ◽  
pp. 6214-6227 ◽  
Author(s):  
Gattupalli Manikya Rao ◽  
G. Seeta Rama Raju ◽  
Sk. Khaja Hussain ◽  
E. Pavitra ◽  
P. S. V. Subba Rao ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Host Lattice ◽  
Rare Earth Ions ◽  
White Region ◽  
Light Region ◽  
Trivalent Rare Earth ◽  
Co Doped

Sr2Gd8(SiO4)6O2 is an excellent host lattice for tunable emissions via the white-light region when co-doped with suitable trivalent rare-earth ions.

Recent advances in rare earth co-doped luminescent tungsten oxygen complexes

2021 ◽  
Author(s):  
Jingping Wang ◽  
Bing Yan ◽  
Hechen Wu ◽  
Pengtao Ma ◽  
Jingyang Niu
Keyword(s):  
Rare Earth ◽  
Recent Advances ◽  
Defense Technology ◽  
Lighting Application ◽  
Co Doped ◽  
Oxygen Complexes ◽  
Modern Industry

Rare earth (RE) materials have been employed in almost every corner of modern industry, such as lighting application, defense technology, industrial catalysis and so on. Particularly, RE-based tungsten oxygen complexes...

Microwave dielectric properties of Mg(Zr0.05Ti0.95)O3-SrTiO3 ceramics

2011 ◽  
Vol 23 (2) ◽  
pp. 572-575 ◽  
Author(s):  
Hongtao Yu ◽  
Jilin Cheng ◽  
Wenbo Zhang ◽  
Jingsong Liu ◽  
Guangliang Xu
Keyword(s):  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Microwave Dielectric ◽  
Srtio3 Ceramics
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