The possibility of giant dielectric materials for multilayer ceramic capacitors

Ishii, Tatsuya; Endo, Makoto; Masuda, Kenichiro; Ishida, Keisuke

doi:10.1063/1.4791555

Cited by 12 publications

(6 citation statements)

References 8 publications

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“…[1][2][3][4][5][6] Capacitors are one of the vital energy storage devices used in the modern electrical and electronics industry. [7][8][9][10][11][12][13][14][15][16][17][18][19] Among the various capacitors (i.e., supercapacitors, electrochemical capacitors and dielectric film capacitors), dielectric film based parallel plate capacitors have irreplaceable advantages because of their capability for withstanding high electric field and high energy density. 20 For a parallel plate capacitor, its energy storage property (including capacity and efficiency) is determined by the electrical properties of the dielectric films separating the opposite charges.…”

Section: Introductionmentioning

confidence: 99%

Core–satellite Ag@BaTiO3 nanoassemblies for fabrication of polymer nanocomposites with high discharged energy density, high breakdown strength and low dielectric loss

Xie

Huang

et al. 2013

Phys. Chem. Chem. Phys.

154

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Dielectric polymer nanocomposites with high dielectric constant have wide applications in high energy density electronic devices. The introduction of high dielectric constant ceramic nanoparticles into a polymer represents an important route to fabricate nanocomposites with high dielectric constant. However, the nanocomposites prepared by this method generally suffer from relatively low breakdown strength and high dielectric loss, which limit the further increase of energy density and energy efficiency of the nanocomposites. In this contribution, by using core-satellite structured ultra-small silver (Ag) decorated barium titanate (BT) nanoassemblies, we successfully fabricated high dielectric constant polymer nanocomposites with enhanced breakdown strength and lower dielectric loss in comparison with conventional polymer-ceramic particulate nanocomposites. The discharged energy density and energy efficiency are derived from the dielectric displacement-electric field loops of the polymer nanocomposites. It is found that, by using the core-satellite structured Ag@BT nanoassemblies as fillers, the polymer nanocomposites can not only have higher discharged energy density but also have high energy efficiency. The mechanism behind the improved electrical properties was attributed to the Coulomb blockade effect and the quantum confinement effect of the introduced ultra-small Ag nanoparticles. This study could serve as an inspiration to enhance the energy storage densities of dielectric polymer nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Core–satellite Ag@BaTiO3 nanoassemblies for fabrication of polymer nanocomposites with high discharged energy density, high breakdown strength and low dielectric loss

Xie

Huang

et al. 2013

Phys. Chem. Chem. Phys.

154

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“…The core-shell structure should be one effective way to achieve this goal, that is, the nickleate particle will be coated by an insulated shell, such as, SiO 2 etc. [14,15]. In the core, the short-range hopping of small polarons will be existed, while the long-range hopping will be prevented by the insulated shell.…”

Section: Introductionmentioning

confidence: 97%

Giant dielectric response with reduced loss in ceramics with nominal composition of La1.5Sr0.5NiO4-SiO2

Liu

et al. 2016

J Electroceram

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Structures and dielectric properties of La 1.5 Sr 0.5 NiO 4 ceramics with different contents of SiO 2 additives were investigated. The La 1.5 Sr 0.5 NiO 4 particles were dispersed into SiO 2 matrixes via a sol-gel process, while the homogeneous distribution was destroyed by the reaction between La 1.5 Sr 0.5 NiO 4 and SiO 2 during the sintering process, so the composite ceramics consisted of La 1.5 Sr 0.5 NiO 4 , La 9.33 Si 6 O 26 and NiO phases. The dielectric constants at room temperature varied slightly, while the dielectric losses could be suppressed with a moderate amount of SiO 2 additive. Temperature-independent giant dielectric constant with low loss was achieved in the ceramics with nominal composition of La 1.5 Sr 0.5 NiO 4 -0.80SiO 2 . Based on the analysis of impedance spectra, the giant dielectric response in the composite ceramics was attributed to the combination of the small polaronic hopping and Maxwell-Wagner effect.

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“…Photochromic compounds have attracted considerable attention because of their diverse application in photo-optical switching devices, holographic displays, biology, sensors, optical storage and memory devices. [1][2][3][4][5][6][7] Therefore, in the past decade, various photochromic compounds with diverse photoresponsive units have been synthesized. [8][9][10][11][12][13][14] Many of the photochromic compounds only exhibit photochromic properties in the solution state.…”

Section: Introductionmentioning

confidence: 99%

Photochromic Properties of Novel One‐pot Multicomponent Synthesized Tetraarylimidazoles

et al. 2019

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Acetic acid mediated synthesis of novel tetraarylimidazoles derivatives has been reported via multicomponent reaction of benzil or phenanthrene‐9,10‐dione, NH4OAc, vanillin and aniline derivatives under microwave irradiation. Several novel tetraarylimidazole derivatives, phenanthroimidazole and bis‐tetraphenylimidazole bearing a 2‐methoxyphenol substituent at position 2 of imidazole ring were prepared. The advantages of this method are the one‐pot preparation of compounds, in short reaction times (4‐7 min) and good yields. All synthesized compounds with a 2‐methoxyphenol substituent at position 2 of imidazole ring exhibited good photochromic behavior. The photoisomerization can be performed from ground state to triplet excited state according to TD‐DFT calculation. The results showed that the presence of ortho‐methoxy substituent to hydroxyl substitution has the greatest effect on photochromic properties of target compounds. Furthermore, a pattern was successfully visualized upon UV light irradiation, which suggested that these compounds can be served as a security ink or an anti‐counterfeiting mark for photo printing.

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The possibility of giant dielectric materials for multilayer ceramic capacitors

Cited by 12 publications

References 8 publications

Core–satellite Ag@BaTiO3 nanoassemblies for fabrication of polymer nanocomposites with high discharged energy density, high breakdown strength and low dielectric loss

Core–satellite Ag@BaTiO3 nanoassemblies for fabrication of polymer nanocomposites with high discharged energy density, high breakdown strength and low dielectric loss

Giant dielectric response with reduced loss in ceramics with nominal composition of La1.5Sr0.5NiO4-SiO2

Photochromic Properties of Novel One‐pot Multicomponent Synthesized Tetraarylimidazoles

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