Study of alternating current impedance analysis and dielectric properties of carbon nanotube-based polysulfone nanocomposites

2011 ◽  
Vol 33 (1) ◽  
pp. 85-91 ◽  
Author(s):  
L. Nayak ◽  
D. Khastgir ◽  
T.K. Chaki
Keyword(s):  
Carbon Nanotube ◽  
Dielectric Properties ◽  
Impedance Analysis ◽  
Alternating Current

scholarly journals The effects of calcination and doping on structural and dielectric properties of CaCu3-xCoxTi4O12 ceramic

2019 ◽  
Vol 8 (3) ◽  
pp. 234
Author(s):  
Nasr Hadi ◽  
Tajdine Lamcharfi ◽  
Farid Abdi ◽  
Nor-Said Echtoui ◽  
Ahmed Harrach ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Complex Impedance ◽  
Impedance Analysis ◽  
Xrd Analysis ◽  
Secondary Phases ◽  
Solid State Method ◽  
Complex Impedance Analysis ◽  
Oxide Powders ◽  
Increasing Temperature

<p class="Abstract"><span lang="EN-US">The influences of calcination temperature and doping with cobalt in A–site on structural and dielectric properties of CaCu<sub>3-x</sub>Co<sub>x</sub>Ti<sub>4</sub>O<sub>12</sub> (CCCxTO, x = 0.00, 0.02 and 0.10) ceramics sintered at 1050 <sup>0</sup>C for 8h were investigated. The ceramic samples are prepared by the conventional solid-state method using high purity oxide powders, and they are calcined at 850 °C, 950 °C and 1050 <sup>0</sup>C for 4h. The X-ray diffraction (XRD) analysis of pure and doped CCTO samples calcined at 950 °C and 1050 <sup>0</sup>C showed no traces of any other secondary phases, while impurity phases alongside CCTO phase in the x=0.00 sample calcined at 850 <sup>0</sup>C was observed. Scanning electron microscopy (SEM) investigation showed an increase in grain size with increasing of Co content and calcining temperature. Dielectric measurements indicated that the dielectric constant of the pure CCTO calcined at 1050 <sup>0</sup>C/4h has a low value in the frequency range of 1kHz up to 1MHz, whereas the substitution of Co up to x = 0.10 into CCTO caused a huge increase in the dielectric constant value of the calcined samples which is equal to 153419 and 18957 at 950 <sup>°</sup>C and 1050 <sup>0</sup>C respectively. The complex impedance analysis of all samples shows a decrease in resistance with an increasing temperature, which suggests a semiconductor nature of the samples.</span></p>

Microstucture, dielectric properties and impedance analysis of NaBixTi6O12.5+1.5x lead-free ceramics

2019 ◽  
Vol 30 (11) ◽  
pp. 10821-10829
Author(s):  
Lu Qin ◽  
Kanghui Liu ◽  
Zhentao Wu ◽  
Yike Du ◽  
Yong Chen ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Impedance Analysis ◽  
Lead Free ◽  
Lead Free Ceramics

Wavefront Velocity Oscillations of Carbon-Nanotube-Guided Thermopower Waves: Nanoscale Alternating Current Sources

ACS Nano ◽  
2010 ◽  
Vol 5 (1) ◽  
pp. 367-375 ◽  
Author(s):  
Joel T. Abrahamson ◽  
Wonjoon Choi ◽  
Nicole S. Schonenbach ◽  
Jungsik Park ◽  
Jae-Hee Han ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Alternating Current ◽  
Thermopower Waves

Influence of process parameters on the morphology, rheological and dielectric properties of three-roll-milled multiwalled carbon nanotube/epoxy suspensions

Polymer ◽  
2013 ◽  
Vol 54 (1) ◽  
pp. 188-198 ◽  
Author(s):  
Ganiu Olowojoba ◽  
Shyam Sathyanarayana ◽  
Burak Caglar ◽  
Bernadeth Kiss-Pataki ◽  
Irma Mikonsaari ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Dielectric Properties ◽  
Process Parameters ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Influence Of Process Parameters

scholarly journals Gas-induced variation in the dielectric properties of carbon nanotube bundles for selective sensing

2005 ◽  
Vol 97 (11) ◽  
pp. 114316 ◽  
Author(s):  
F. Picaud ◽  
R. Langlet ◽  
M. Arab ◽  
M. Devel ◽  
C. Girardet ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Dielectric Properties ◽  
Nanotube Bundles ◽  
Induced Variation
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