A Computational Framework for the Inverse Identification of Temperature-Dependent Dielectric Permittivity of Materials at Giga-Hertz Frequencies

2021 ◽  
Author(s):  
Athanasios Iliopoulos ◽  
Benjamin Graber ◽  
John Michopoulos ◽  
John Steuben ◽  
E. P. Gorzkowski ◽  
...  
Keyword(s):  
Dielectric Permittivity ◽  
Inverse Identification ◽  
Temperature Dependent ◽  
Computational Framework

A Computational Framework for the Inverse Identification of Temperature-Dependent Dielectric Permittivity of Materials at Giga-Hertz Frequencies

2020 ◽  
Author(s):  
A. P. Iliopoulos ◽  
B. D. Graber ◽  
J. G. Michopoulos ◽  
J. C. Steuben ◽  
A. J. Birnbaum ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Permittivity ◽  
Microwave Sintering ◽  
Inverse Identification ◽  
Temperature Dependent ◽  
Computational Framework ◽  
The Real ◽  
Inverse Approach ◽  
Solid Objects ◽  
Experimental Apparatus

Abstract The microwave sintering of ceramics and other materials has emerged as an attractive method of manufacturing solid objects though volumetric approaches. The accurate modeling of such processes requires the knowledge of the dielectric constant, and particularly the real and imaginary parts of the permittivity, of these materials as they vary with temperature. This particular measurement becomes very challenging as the temperature rises. In this work, an experimental apparatus and an inverse approach are proposed, based on the coupling of the thermo-mechano-electromagnetic physics that can be used to measure the real and imaginary parts of the dielectric constant at high temperatures.

scholarly journals Temperature Dependence of Electrical Properties and Crystal Structure of 0.29Pb(In1/2Nb1/2)O3–0.44Pb(Mg1/3Nb2/3)O3–0.27PbTiO3Single Crystals

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Qian Li ◽  
Yun Liu ◽  
Andrew Studer ◽  
Zhenrong Li ◽  
Ray Withers ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Electrical Properties ◽  
Dielectric Permittivity ◽  
Neutron Diffraction ◽  
Electrical Measurement ◽  
Temperature Dependent ◽  
Electromechanical Properties ◽  
Polar Order

We characterized the temperature dependent (~25–200°C) electromechanical properties and crystal structure of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3single crystals usingin situelectrical measurement and neutron diffraction techniques. The results show that the poled crystal experiences an addition phase transition around 120°C whereas such a transition is absent in the unpoled crystal. It is also found that the polar order persists above the maximum dielectric permittivity temperature at which the crystal shows a well-defined antiferroelectric behavior. The changes in the electrical properties and underlying crystal structure are discussed in the paper.

Revisiting the temperature-dependent dielectric permittivity of Ba(Ti1−x Zr x )O3

2018 ◽  
Vol 101 (6) ◽  
pp. 2408-2416 ◽  
Author(s):  
Laijun Liu ◽  
Shaokai Ren ◽  
Jie Zhang ◽  
Biaolin Peng ◽  
Liang Fang ◽  
...  
Keyword(s):  
Dielectric Permittivity ◽  
Temperature Dependent
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