Ferroelectric and ferrimagnetic iron-doped thin-film BaTiO3: Influence of iron on physical properties

2002 ◽  
Vol 92 (9) ◽  
pp. 5429-5436 ◽  
Author(s):  
R. Maier ◽  
J. L. Cohn
2012 ◽  
Vol 12 (12) ◽  
pp. 9299-9301 ◽  
Author(s):  
X. Wei ◽  
R. Georgescu ◽  
N. Ali ◽  
I. Morjan ◽  
T. A. George ◽  
...  

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1476 ◽  
Author(s):  
Dongliang Kuang ◽  
Zhou Ye ◽  
Lifeng Yang ◽  
Ning Liu ◽  
Zaihong Lu ◽  
...  

DBSA was used as a solubilizer together with conventional rejuvenator (CR) to produce a solubilized rejuvenator (SR), two kinds of aged bitumen involving TFOT aged bitumen and PAV aged bitumen were obtained by thin film oven test (TFOT) and pressurized aging vessel (PAV), respectively. Effects of CR and SR on the physical properties, chemical components, colloidal structure and micro-morphology of TFOT aged bitumen and PAV aged bitumen were investigated. Testing results of physical properties and chemical components indicated that CR and SR can replenish aged bitumen with necessary aromatics, TFOT aged bitumen that chemical component variation deteriorates its physical properties. With regard to PAV aged bitumen, of which the performance attenuation lies in chemical components variation and colloidal structure transformation, even if the content of CR reached up to 10 wt %, the regenerated bitumen cannot meet the regeneration requirement yet due to its definite influence on colloidal structure transformation, comparatively, sulfonic group in SR can react with the superficial atoms of asphaltenes to reform a solvation layer to facilitate the colloidal structure transformation of PAV aged bitumen, performance and beelike structure of regenerated PAV aged with bitumen with 10 wt % SR were approximated to that of virgin bitumen.


2019 ◽  
Vol 21 (46) ◽  
pp. 25690-25699 ◽  
Author(s):  
Xiaowu Tang ◽  
Hyeok-jin Kwon ◽  
Heqing Ye ◽  
Jae Young Kim ◽  
Jaewoong Lee ◽  
...  

The addition of hardeners to the PEDOT:PSS composites enhances both electrical and physical properties to satisfy the requirements for electrode usages in organic electronic devices.


2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Andriy Nadtochiy ◽  
Vasyl Kuryliuk ◽  
Viktor Strelchuk ◽  
Oleg Korotchenkov ◽  
Pei-Wen Li ◽  
...  

Abstract Due to their inherent physical properties, thin-film Si/SiGe heterostructures have specific thermal management applications in advanced integrated circuits and this in turn is essential not only to prevent a high local temperature and overheat inside the circuit, but also generate electricity through the Seebeck effect. Here, we were able to enhance the Seebeck effect in the germanium composite quantum dots (CQDs) embedded in silicon by increasing the number of thin silicon layers inside the dot (multi-fold CQD material). The Seebeck effect in the CQD structures and multi-layer boron atomic layer-doped SiGe epitaxial films was studied experimentally at temperatures in the range from 50 to 300 K and detailed calculations for the Seebeck coefficient employing different scattering mechanisms were made. Our results show that the Seebeck coefficient is enhanced up to ≈40% in a 3-fold CQD material with respect to 2-fold Ge/Si CQDs. This enhancement was precisely modeled by taking into account the scattering of phonons by inner boundaries and the carrier filtering by the CQD inclusions. Our model is also able to reproduce the observed temperature dependence of the Seebeck coefficient in the B atomic layer-doped SiGe fairly well. We expect that the phonon scattering techniques developed here could significantly improve the thermoelectric performance of Ge/Si materials through further optimization of the layer stacks inside the quantum dot and of the dopant concentrations.


1997 ◽  
Vol 30 (2) ◽  
pp. 161-165 ◽  
Author(s):  
A Abd El-Mongy ◽  
A Belal ◽  
H El Shaikh ◽  
A El Amin

Sign in / Sign up

Export Citation Format

Share Document