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The frequency and temperature dependence of the dielectric constant, electric modulus and electrical conductivity of the transparent glasses in the composition 0.5Li2O-0.5Na2O-2B2O3 (LNBO) were investigated in the 100 Hz - 10 MHz frequency…

材料科学 · 物理学 2010-07-13 Rahul Vaish , K. B. R. Varma

The frequency and temperature dependence of the dielectric constant and the electrical conductivity of the transparent glasses in the composition Li2O-3B2O3 (LBO) were investigated in the 100 Hz- 10 MHz frequency range. The dielectric…

材料科学 · 物理学 2015-05-19 Rahul Vaish , K. B. R. Varma

Transparent glasses in the system 0.5Li2O-0.5M2O-2B2O3 (M=Li, Na and K) were fabricated via the conventional melt quenching technique. Amorphous and glassy nature of the samples were confirmed via the X-ray powder diffraction and the…

材料科学 · 物理学 2015-05-19 G. Paramesh , Rahul Vaish , K. B. R. Varma

X-ray powder diffraction (XRD) along with differential thermal analysis (DTA) carried out on the as-quenched samples in the 3BaO-3TiO2-B2O3 system confirmed their amorphous and glassy nature, respectively. The dielectric constants in the 1…

材料科学 · 物理学 2010-07-13 Rahul Vaish , K. B. R. Varma

Electrical conduction and relaxation phenomena in bismuth borate glasses in the composition 2Bi2O3-B2O3 (Bi4B2O9) were investigated. Dielectric studies carried out on these glasses revealed near constant loss (NCL) response in the 1 kHz to…

材料科学 · 物理学 2011-08-01 G Paramesh , K B R Varma

The glasses in the system (100-x)TeO2-xCaCu3Ti4O12, (x=0.25 to 3 mol %) were fabricated. The color varied from olive green to brown as the CaCu3Ti4O12 (CCTO) content increased in TeO2 matrix. The X-ray powder diffraction and differential…

材料科学 · 物理学 2013-01-22 P. Thomas , K. B. R. Varma

Dielectric behavior and conductivity mechanism in lead-free (100-x)(Li0.12Na0.88)NbO3-xBaTiO3 (0 to x to 40) piezoelectric ceramics were investigated using impedance spectroscopy over a wide temperature (-100 oC to500 oC) and frequency…

材料科学 · 物理学 2017-06-13 Supratim Mitra , Ajit R Kulkarni

We report a thorough dielectric characterization of the alpha relaxation of glass forming glycerol with varying additions of LiCl. Nine salt concentrations from 0.1 - 20 mol% are investigated in a frequency range of 20 Hz - 3 GHz and…

软凝聚态物质 · 物理学 2008-10-29 M. Köhler , P. Lunkenheimer , A. Loidl

Elastic storage modulus and loss of relaxor lead magnesium niobate ceramics, Pb(Mg1/3Nb2/3)O3, have been measured with dynamic mechanical analyzer in single cantilever mode in the temperature range from 170 K to 320 K and at frequencies…

材料科学 · 物理学 2013-08-20 Hana Ursic , Dragan Damjanovic

Crystalline Bi5NbO10 nanoparticles have been achieved through a modified sol-gel process using a mixture of ethylenediamine and ethanolamine as a solvent. The Bi5NbO10 nanoparticles were characterized by X-ray diffraction (XRD),…

材料科学 · 物理学 2009-10-26 Jungang Hou , Rahul Vaish , Yuanfang Qu , Dalibor Krsmanovica , K. B. R. Varmac , R. V. Kumara

The complex impedance of a Pr0.67Ca0.33MnO3 crystal has been measured. The frequency dependence is studied for a wide range of temperatures (50K-403K) and is found to be characteristic of relaxation process with a single Debye time…

强关联电子 · 物理学 2009-11-10 Silvana Mercone , Alexandre Wahl , Alain Pautrat , Michael Pollet , Charles Simon

We investigated the dynamics of a series of room temperature ionic liquids based on the same 1-butyl-3-methyl imidazolium cation and different anions by means of broadband dielectric spectroscopy covering 15 decades in frequency…

无序系统与神经网络 · 物理学 2009-11-11 Alberto Rivera , Ernst A. Roessler

We investigate the relaxation and conduction mechanism of Ba0.90Sr0.10TiO3 (BST) ceramic, synthesized by the solid state reaction method. The dielectric and relaxation properties are analyzed in the temperature range of 380-450{\deg}C with…

In the present work, dielectric spectra of mixtures of diethylsulfoxide (DESO) and water are presented, covering a concentration range of 0.2 - 0.3 molar fraction of DESO. The measurements were performed at frequencies between 1 Hz and 10…

无序系统与神经网络 · 物理学 2014-11-13 L. Gabrielyan , S. Markarian , P. Lunkenheimer , A. Loidl

After a strong electric bias field was applied to a glass sample at temperatures in the millikelvin range its AC-dielectric constant increases and then decays logarithmically with time. For the polyester glass mylar we have observed the…

无序系统与神经网络 · 物理学 2009-11-07 S. Ludwig , P. Nalbach , D. Rosenberg , D. Osheroff

The molecular mobility of glassy and supercooled liquid states of clotrimazole is studied using broadband dielectric spectroscopy for a wide range of temperatures and frequency. The dielectric loss data of clotrimazole below T$_{g}$, do not…

软凝聚态物质 · 物理学 2016-09-12 N S K Kumar , G Govindaraj , U Sailaja

Low frequency dielectric spectroscopy and thermally stimulated discharge measurements of charge density wave (CDW) system K$_{0.3}$MoO$_{3}$ are presented. Below 80 K two distinct relaxational processes are observed, which freeze at finite…

凝聚态物理 · 物理学 2016-08-16 D. Starešinić , K. Hosseini , W. Brütting , K. Biljaković , E. Riedel , S. van Smaalen

Frequency dependence of the dielectric constant of complex perovskite oxide Ba(1-x)La(x)Ti(1-x)Cr(x)O3 (BLTC) ceramics with the composition ratio 0.4<= x <= 0.7 is precisely measured in the temperature range from 20 K to 300 K, and the…

材料科学 · 物理学 2007-05-23 Mamoru Fukunaga , Yoshiaki Uesu

Broadband dielectric spectroscopy was used to study the molecular orientational dynamics of the glass-forming, thioether-linked cyanobiphenyl liquid crystal dimers. As was expected theoretically, two different relaxation processes that…

软凝聚态物质 · 物理学 2023-04-18 M. Czarnecka , Y. Arakawa , A. Kocot , K. Merkel

We investigate the structural, dielectric relaxation, electric modulus and impedance behavior of Ni-doped NASICON ceramic Na$_{3+2x}$Zr$_{2-x}$Ni$_{x}$Si$_2$PO$_{\rm 12}$ ($x=$ 0.05--0.2) prepared using the solid-state reaction method. The…

材料科学 · 物理学 2024-03-22 Ramcharan Meena , Rajendra S. Dhaka
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