Permittivity boosting in “yellow” (Nb + In) co-doped TiO2

2020 ◽  
Vol 8 (39) ◽  
pp. 13627-13631
Author(s):  
Hiroki Taniguchi ◽  
Daiki Sato ◽  
Akitoshi Nakano ◽  
Ichiro Terasaki
Keyword(s):  
Dielectric Properties ◽  
Doped Tio2 ◽  
Post Annealing ◽  
Co Doped

Unusual effects of post annealing on optical and dielectric properties of (Nb0.5In0.5)0.01Ti0.99O2 (NITO-1.0%) are reported in the present study.

Effects of sintering temperature on microstructure and giant dielectric properties of (V + Ta) co–doped TiO2 ceramics

2017 ◽  
Vol 725 ◽  
pp. 310-317 ◽  
Author(s):  
Wattana Tuichai ◽  
Supamas Danwittayakul ◽  
Narong Chanlek ◽  
Prasit Thongbai
Keyword(s):  
Dielectric Properties ◽  
Sintering Temperature ◽  
Doped Tio2 ◽  
Giant Dielectric ◽  
Co Doped

Nonlinear current-voltage and giant dielectric properties of Al3+ and Ta5+ co-doped TiO2 ceramics

2019 ◽  
Vol 116 ◽  
pp. 137-142 ◽  
Author(s):  
Wattana Tuichai ◽  
Supamas Danwittayakul ◽  
Narong Chanlek ◽  
Prasit Thongbai
Keyword(s):  
Dielectric Properties ◽  
Doped Tio2 ◽  
Giant Dielectric ◽  
Current Voltage ◽  
Co Doped

scholarly journals High-Performance Giant Dielectric Properties of Cr3+/Ta5+ Co-Doped TiO2 Ceramics

ACS Omega ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 1901-1910
Author(s):  
Wattana Tuichai ◽  
Supamas Danwittayakul ◽  
Narong Chanlek ◽  
Masaki Takesada ◽  
Atip Pengpad ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
High Performance ◽  
Doped Tio2 ◽  
Giant Dielectric ◽  
Co Doped

scholarly journals Microstructural Evolution and High-Performance Giant Dielectric Properties of Lu3+/Nb5+ Co-Doped TiO2 Ceramics

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 7041
Author(s):  
Noppakorn Thanamoon ◽  
Narong Chanlek ◽  
Pornjuk Srepusharawoot ◽  
Ekaphan Swatsitang ◽  
Prasit Thongbai
Keyword(s):  
Dielectric Properties ◽  
Grain Boundaries ◽  
Dopant Concentration ◽  
Dielectric Behavior ◽  
Second Phase ◽  
Doped Tio2 ◽  
Dielectric Relaxations ◽  
Giant Dielectric ◽  
Second Phase Particles ◽  
Co Doped

Giant dielectric (GD) oxides exhibiting extremely large dielectric permittivities (ε’ > 104) have been extensively studied because of their potential for use in passive electronic devices. However, the unacceptable loss tangents (tanδ) and temperature instability with respect to ε’ continue to be a significant hindrance to their development. In this study, a novel GD oxide, exhibiting an extremely large ε’ value of approximately 7.55 × 104 and an extremely low tanδ value of approximately 0.007 at 103 Hz, has been reported. These remarkable properties were attributed to the synthesis of a Lu3+/Nb5+ co-doped TiO2 (LuNTO) ceramic containing an appropriate co-dopant concentration. Furthermore, the variation in the ε’ values between the temperatures of −60 °C and 210 °C did not exceed ±15% of the reference value obtained at 25 °C. The effects of the grains, grain boundaries, and second phase particles on the dielectric properties were evaluated to determine the dielectric properties exhibited by LuNTO ceramics. A highly dense microstructure was obtained in the as-sintered ceramics. The existence of a LuNbTiO6 microwave-dielectric phase was confirmed when the co-dopant concentration was increased to 1%, thereby affecting the dielectric behavior of the LuNTO ceramics. The excellent dielectric properties exhibited by the LuNTO ceramics were attributed to their inhomogeneous microstructure. The microstructure was composed of semiconducting grains, consisting of Ti3+ ions formed by Nb5+ dopant ions, alongside ultra-high-resistance grain boundaries. The effects of the semiconducting grains, insulating grain boundaries (GBs), and secondary microwave phase particles on the dielectric relaxations are explained based on their interfacial polarizations. The results suggest that a significant enhancement of the GB properties is the key toward improvement of the GD properties, while the presence of second phase particles may not always be effective.

scholarly journals Dielectric properties of Y and Nb co-doped TiO2 ceramics

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Xianwei Wang ◽  
Bihui Zhang ◽  
Linhai Xu ◽  
Xiaoer Wang ◽  
Yanchun Hu ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Doped Tio2 ◽  
Co Doped

AC conductivity and dielectric properties of Co-doped TiO2

2005 ◽  
Vol 364 (1-4) ◽  
pp. 300-305 ◽  
Author(s):  
Mustafa Okutan ◽  
Engin Basaran ◽  
Halil I. Bakan ◽  
Fahrettin Yakuphanoglu
Keyword(s):  
Dielectric Properties ◽  
Ac Conductivity ◽  
Doped Tio2 ◽  
Co Doped

Humidity sensing behavior and its influence on the dielectric properties of (In + Nb) co-doped TiO2 ceramics

2019 ◽  
Vol 54 (24) ◽  
pp. 14645-14653 ◽  
Author(s):  
R. J. Si ◽  
T. Y. Li ◽  
J. Sun ◽  
J. Wang ◽  
S. T. Wang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Humidity Sensing ◽  
Doped Tio2 ◽  
Co Doped

Giant Dielectric Properties of Ga3+–Nb5+ Co-doped TiO2 Ceramics Driven by the Internal Barrier Layer Capacitor Effect

Materialia ◽  
2021 ◽  
pp. 101175
Author(s):  
Wattana Tuichai ◽  
Supamas Danwittayakul ◽  
Jedsada Manyam ◽  
Narong Chanlek ◽  
Masaki Takesada ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Barrier Layer ◽  
Doped Tio2 ◽  
Internal Barrier ◽  
Giant Dielectric ◽  
Internal Barrier Layer Capacitor ◽  
Co Doped

scholarly journals Enhanced dielectric properties of colossal permittivity co-doped TiO2/polymer composite films

RSC Advances ◽  
2018 ◽  
Vol 8 (57) ◽  
pp. 32972-32978 ◽  
Author(s):  
Mei-Yan Tse ◽  
Xianhua Wei ◽  
Chi-Man Wong ◽  
Long-Biao Huang ◽  
Kwok-ho Lam ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Energy Density ◽  
Polymer Composite ◽  
Composite Films ◽  
High Energy ◽  
High Energy Density ◽  
Doped Tio2 ◽  
Technological Potential ◽  
Colossal Permittivity ◽  
Co Doped

Colossal permittivity (CP) materials have shown great technological potential for advanced microelectronics and high-energy-density storage applications.

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