The Giant Dielectric Constant of Y2NiMnO6 Ceramics for DC Bias

2017 ◽  
Vol 866 ◽  
pp. 277-281
Author(s):  
Naphat Albutt ◽  
Suejit Pechprasarn ◽  
Pattaraporn Damkoengsuntorn ◽  
Thanapong Sareein
Keyword(s):  
Dielectric Constant ◽  
Dielectric Permittivity ◽  
Room Temperature ◽  
Frequency Range ◽  
Electronic Components ◽  
Giant Dielectric ◽  
High Dielectric Permittivity ◽  
Dc Bias ◽  
Giant Dielectric Constant ◽  
High Dielectric

In this work, the uses of giant dielectric constant of Y2NiMnO6 ceramics were investigated in the frequency range from 1 kHz to 3 MHz. The Y2NiMnO6 ceramics were sintered at 1400 °C for 6, 12, 18 and 24 hours, respectively. The dielectric properties of Y2NiMnO6 ceramics were examined in dc bias from 0 to 1.5 volt at room temperature. We found that all sintering times displayed high dielectric permittivity at frequencies below 105 Hz, above which the values decreased significantly, applied dc bias also reduced dielectric permittivity. The peak of dielectric loss decreased significantly at high dc bias due to decreased contribution of dc conductivity in grain ceramics. This research has characterised electrical properties of Y2NiMnO6 ceramics which maybe suitable for electronic components including batteries and capacitors.

A new single/few-layered graphene oxide with a high dielectric constant of 106: contribution of defects and functional groups

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14768-14779 ◽  
Author(s):  
K. Santhosh Kumar ◽  
Suresh Pittala ◽  
Srinath Sanyadanam ◽  
Pradip Paik
Keyword(s):  
Dielectric Constant ◽  
Graphene Oxide ◽  
Dielectric Permittivity ◽  
Functional Groups ◽  
High Dielectric Constant ◽  
Frequency Range ◽  
Temperature Range ◽  
High Dielectric Permittivity ◽  
High Dielectric

In this study, we introduce a single/few-layered graphene oxide (GO) synthesized with ultrasonication, and demonstrate its high dielectric permittivity in the frequency range of 20 Hz to 2 MHz and temperature range of 30 °C to 180 °C.

scholarly journals Colossal Permittivity and Multiple Effects in (Zn + Ta) co-doped TiO2 Ceramics

2020 ◽  
Author(s):  
Jiangtao Fan ◽  
TianTian Yang ◽  
Zhenzhu Cao
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Low Dielectric ◽  
Giant Dielectric ◽  
High Dielectric Permittivity ◽  
Colossal Permittivity ◽  
Giant Dielectric Constant ◽  
High Dielectric ◽  
Device Miniaturization ◽  
Co Doped

Abstract The search for giant dielectric constant materials is imperative because of their potential for important applications for the areas of device miniaturization and energy storage. In this work, we report a (Zn + Ta) co-doped TiO2 (ZTTO) ceramics that manifests high dielectric permittivity (>104) and low dielectric loss. This dielectric property shows a high stability in wide temperature range (25-200℃) and frequency range(20-106Hz). The crystalline structure, microstructure and dielectric properties of ZTTO ceramics were systematically investigated. XPS, Impedance spectroscopy and frequency dependent dielectric constant under DC bias results reveal that the colossal dielectric properties of (Zn2+1/3Ta5+2/3)xTi1-xO2 ceramics were mainly caused by electron-pinned defect-dipoles (EPDD) model, internal barrier layer capacitance (IBLC) effect and electrode effect. This work would provide a guidance to further researching the colossal permittivity CP materials.

scholarly journals Colossal dielectric constant of NaNbO3 doped BaTiO3 ceramics

2016 ◽  
Vol 34 (2) ◽  
pp. 322-329 ◽  
Author(s):  
Wan Q. Cao ◽  
Ling F. Xu ◽  
Mukhlis M. Ismail ◽  
Li L. Huang
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Traditional Approach ◽  
Temperature Stability ◽  
Bound State ◽  
High Energy ◽  
Low Dielectric ◽  
Giant Dielectric ◽  
Giant Dielectric Constant ◽  
High Dielectric

AbstractBaTiO3 ceramics doped with 0.40 mol% NaNbO3 were prepared using a traditional approach by sintering at temperature of 1250 °C to 1290 °C. The prepared ceramics was characterized by very good dielectric properties, such as high dielectric constant (1.5 × 105), low dielectric loss (0.1), and good dielectric temperature stability in the −40 °C to 100 °C range for the sample sintered below 1270 °C. The dielectric characteristics obtained with XPS confirmed that Ti4+ ions remain in the state without any change. The huge increase in dielectric constant in NaNbO3 doped BaTiO3 samples occurs when large amount of Ba2+ ions are excited to a high energy bound state of Ba2+ − e or Ba+ to create electron hopping conduction. For samples with the content of NaNbO3 higher than 0.40 mol%, or sintering temperature higher than 1280 °C, compensation effect is dominated by cation vacancies with sharply decreasing dielectric constant and increased dielectric loss. The polaron effect is used to explain the relevant mechanism of giant dielectric constant appearing in the ferroelectric phase.

New High-Dielectric-Constant Polymer-Ceramic Composites

2004 ◽  
Vol 847 ◽  
Author(s):  
Milind Arbatti ◽  
Xiaobing Shan ◽  
Z.-Y. Cheng
Keyword(s):  
Dielectric Constant ◽  
Vinylidene Fluoride ◽  
Ceramic Powder ◽  
Ceramic Composites ◽  
Flexible Composites ◽  
Giant Dielectric ◽  
Poly Vinylidene Fluoride ◽  
Solution Cast ◽  
Giant Dielectric Constant ◽  
High Dielectric

ABSTRACTA ceramic-powder polymer composite, making use of a newly developed ceramics - CaCu3Ti4O12 (CCTO) - that has a giant dielectric constant as the filler, is developed. In this work, poly(vinylidene fluoride - trifluoroethylene) [P(VDF-TrFE)] 55/45 mol% copolymer was used as matrix. It is found that the wettability between the copolymer and CCTO is poor, which makes the solution cast composites have a poor uniformity. The uniformity and thus the dielectric constant of the composites can be significantly improved by using hot-press technology to form “sandwich” structure. It is also found that the thermal annealing process can improve the dielectric constant of the composite. The experimental data show that for the flexible composites the dielectric constant at 1 kHz can reach more than 300 at room temperature and more than 700 at ∼70 °C.

scholarly journals Mean-Field Approach to Dielectric Relaxation in Giant Dielectric Constant Perovskite Ceramics

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Shanming Ke ◽  
Peng Lin ◽  
Haitao Huang ◽  
Huiqing Fan ◽  
Xierong Zeng
Keyword(s):  
Dielectric Constant ◽  
Dielectric Relaxation ◽  
Mean Field ◽  
Charge Carriers ◽  
Frequency Range ◽  
Polaron Model ◽  
Field Approach ◽  
Giant Dielectric ◽  
Perovskite Ceramics ◽  
Giant Dielectric Constant

The dielectric properties of CaCu3Ti4O3 (CCTO) and A2FeNbO6 (AFN, A = Ba, Sr, and Ca) giant dielectric constant ceramics were investigated in the frequency range from 1 Hz to 10 MHz. The relaxation properties can be perfectly described by a polaron model, indicating that the dielectric relaxation is intimately related to the hopping motion caused by localized charge carriers.

Dielectric relaxation and giant dielectric constant of Nb-doped CaCu3Ti4O12ceramics under dc bias voltage

2009 ◽  
Vol 206 (3) ◽  
pp. 562-566 ◽  
Author(s):  
Peng Liu ◽  
Ying He ◽  
Jian-ping Zhou ◽  
Chun-hong Mu ◽  
Huai-wu Zhang
Keyword(s):  
Dielectric Constant ◽  
Dielectric Relaxation ◽  
Bias Voltage ◽  
Giant Dielectric ◽  
Dc Bias ◽  
Giant Dielectric Constant

scholarly journals Cu(i) substituted wurtzite ZnO: a novel room temperature lead free ferroelectric and high-κ giant dielectric

RSC Advances ◽  
2020 ◽  
Vol 10 (19) ◽  
pp. 11382-11392 ◽  
Author(s):  
Neeraj Singh ◽  
Preetam Singh
Keyword(s):  
Dielectric Constant ◽  
Room Temperature ◽  
High Dielectric Constant ◽  
Lead Free ◽  
Giant Dielectric ◽  
High Dielectric

Cu+ ion substituted ZnO, Zn1−xCuxO1−δ have shown high dielectric constant (∼6300) at 600 °C at 100 kHz frequency and ferroelectricity at room temperature than for bulk Zn0.95Cu0.05O1−δ samples.

The Investigation of Glass Spheres Containing Elastomer Based Materials for Tunable Device Applications

2014 ◽  
Vol 33 (6) ◽  
pp. 539-543
Author(s):  
E. Şentürk ◽  
M. Okutan ◽  
A. Demirer ◽  
N. Akçakale
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Room Temperature ◽  
Bias Field ◽  
Frequency Range ◽  
Glass Spheres ◽  
Tunable Device ◽  
Device Applications ◽  
Dc Bias ◽  
Very High

AbstractIn this work, dielectric and tunability properties of glass spheres containing elastomer based materials have been investigated with dielectric spectroscopy as a function of frequency, composition and DC bias field. Real and imaginary part of dielectric constant and dielectric loss values of the gs1 (glass spheres), gs2, and gs3 were investigated in the frequency range of 100 to 40 × 106 Hz. Dielectric tunabilities of 69%, 87% and 33% were measured on gs1, gs2, and gs3 at 10 kHz and at room temperature. The degrees of anharmonic contributions to the polarization are very high for gs2 and gs3 as 4.53 × 10−8 and 1.77 × 10−8 (mm/kV)2. Also, dielectric constant, FOM (%) and absorption coefficient a values were calculated at 10 × 103 Hz and 20 × 103 V/mm depending for different glass spheres.

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