scholarly journals Broadband lung dielectric properties over the ablative temperature range: Experimental measurements and parametric models

2019 ◽  
Vol 46 (10) ◽  
pp. 4291-4303 ◽  
Author(s):  
Jan Sebek ◽  
Radoslav Bortel ◽  
Punit Prakash
Keyword(s):  
Dielectric Properties ◽  
Parametric Models ◽  
Experimental Measurements ◽  
Temperature Range

Associating Behavior of Mixed Liquids: Dielectric Properties of the Ethane-1,2-Diol+1,4-Dioxan Solvent System From -10 to +80°C

1995 ◽  
Vol 48 (6) ◽  
pp. 1193 ◽  
Author(s):  
F Corradini ◽  
A Marchetti ◽  
M Tagliazucchi ◽  
L Tassi ◽  
G Tosi
Keyword(s):  
Dielectric Properties ◽  
Complex Formation ◽  
Binary Mixtures ◽  
Relative Permittivity ◽  
Solvent System ◽  
Quantitative Information ◽  
Experimental Measurements ◽  
Empirical Equations ◽  
Qualitative And Quantitative ◽  
Temperature Range

The associating behaviour of ethane-1,2-diol (component 1)+1,4-dioxan (component 2) in their binary mixtures has been investigated through their dielectric properties. The experimental measurements of the relative permittivity (є) in the temperature range -10 ≤ X1 ≤ 80 for nine binary mixtures covering the whole miscibility field 0 ≤ X1 ≤ 1 have been utilized to test empirical equations representing the functions є = є(T), є = є (X1) and є = є(T,X1). Furthermore, the excess mixing function, єE, has been evaluated to obtain qualitative and quantitative information about the possibility of 'solvent- cosolvent ' complex formation.

Effect of TiO2 doping on rapid densification of alumina by plasma activated sintering

1996 ◽  
Vol 11 (5) ◽  
pp. 1144-1148 ◽  
Author(s):  
R. S. Mishra ◽  
A. K. Mukherjee ◽  
K. Yamazaki ◽  
K. Shoda
Keyword(s):  
Dielectric Properties ◽  
Full Density ◽  
Activated Sintering ◽  
Sintering Kinetics ◽  
Temperature Range ◽  
Plasma Activated Sintering

The effects of plasma cycle and TiO2 doping on sintering kinetics during plasma activated sintering (PAS) of γ−Al2O3 have been studied in the temperature range of 1473–1823 K. Multiple plasma cycle leads to higher densification. Also, TiO2 doping enhances the sintering kinetics during PAS. In TiO2 doped specimens, near full density was obtained at 1673 K in less than 6 min using multiple plasma cycle. It is suggested that the dielectric properties of a material are critical for the success of the PAS process.

scholarly journals Dielectric Properties of SbSI in the Temperature Range of 292-475~K

2014 ◽  
Vol 126 (5) ◽  
pp. 1125-1127 ◽  
Author(s):  
A. Starczewska ◽  
B. Solecka ◽  
M. Nowak ◽  
P. Szperlich
Keyword(s):  
Dielectric Properties ◽  
Temperature Range

Microwave dielectric properties of (Zr0.8Sn0.2)TiO4 ceramics with pentavalent additives

1995 ◽  
Vol 10 (8) ◽  
pp. 2085-2090 ◽  
Author(s):  
Ki Hyun Yoon ◽  
Young Sol Kim ◽  
Eung Soo Kim
Keyword(s):  
Dielectric Properties ◽  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Electron Concentration ◽  
Oxygen Vacancies ◽  
Microwave Dielectric Properties ◽  
Temperature Range ◽  
Microwave Dielectric ◽  
Ionic Size

The microwave dielectric properties of (Zr0.8Sn0.2)TiO4 were investigated as a function of the amount of additives such as Nb2O5 Ta2O5 and Sb2O5 in the temperature range of 20 °C to 80 °C at 7 GHz. As the amount of additives increased up to 1.0 mol %, the unloaded Q increased due to the decrease of oxygen vacancies in the (Zr0.8Sn0.2)TiO4 lattice and then decreased with further addition of additives because the electron concentration was increased. The temperature coefficient of the resonant frequency turned more negative with increasing additives. Although the Nb+5, Ta+5, and Sb+5 ions have a similar ionic size and the same valence electronics, each resulted in different microwave dielectric properties.

Multilayer capacitors with bismuth copper tantalate dielectric fabricated in LTCC technology

2016 ◽  
Vol 33 (3) ◽  
pp. 118-123 ◽  
Author(s):  
Dorota Szwagierczak ◽  
Jan Kulawik ◽  
Beata Synkiewicz ◽  
Agata Skwarek
Keyword(s):  
Dielectric Properties ◽  
Grain Boundaries ◽  
Dielectric Response ◽  
Tape Casting ◽  
High Specific Capacitance ◽  
Frequency Range ◽  
Content Type ◽  
Temperature Range ◽  
New Material ◽  
Multilayer Capacitors

Purpose The work was aimed at preparation of green tapes based on a new material Bi2/3CuTa4O12, to achieve spontaneously formation of an internal barrier layer capacitor (IBLC), fabrication of multilayer elements using low temperature cofired ceramics (LTCC) technology and their characterization. Design/methodology/approach The study focused on tape casting, lamination and co-sintering procedures and dielectric properties of Bi2/3CuTa4O12 multilayer capacitors. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) studies of the ceramic elements were performed. Impedance spectroscopy was used for characterization of dielectric properties in the frequency range of 0.1 Hz to −2 MHz and in the temperature range from −55 to 400°C. DC conductivity was investigated in the temperature range 20 to 740°C. Findings SEM observations revealed a good compatibility of the applied commercial Pt paste with the ceramic layers. The EDS microanalysis showed a higher content of oxygen at grain boundaries. The dominant dielectric response, which was recorded in the low frequency range and at temperatures above 0°C, was attributed to grain boundaries. The dielectric response at low temperatures and/or high frequencies was related to grains. The fabricated multilayer capacitors based on Bi2/3CuTa4O12 exhibited a high specific capacitance. Originality/value A new material Bi2/3CuTa4O12 was applied for preparation of green ceramic tapes and utilized for fabrication of multilayer ceramic capacitors using the LTCC technology. This material belongs to the group of high permittivity nonferroelectric compounds with a complex perovskite structure of CaCu3Ti4O12, that causes the spontaneously formation of IBLCs.

Dielectric Analysis Of Semi-Crystalline Poly(Ethylene Terephthalate)

1994 ◽  
Vol 347 ◽  
Author(s):  
Jianghua Wei ◽  
Richard Delgado ◽  
Martin C. Hawley ◽  
Mark T.Demeuse
Keyword(s):  
Dielectric Properties ◽  
Ethylene Terephthalate ◽  
Dielectric Analysis ◽  
Frequency Range ◽  
Fixed Frequency ◽  
Scanning Calorimetry ◽  
Fixed Temperature ◽  
Temperature Range ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

ABSTRACTDielectric properties of poly(ethylene terephthalate) (PET) were measured over a frequency range of 10 KHz to 2.45 GHz and a temperature range of 20 to 110°C. Relaxation peaks were identified at 1) fixed frequency with variable temperatures, and 2) fixed temperature with variable frequencies. The crystallinity of poly (ethylene terephthalate) was measured using differential scanning calorimetry (DSC). Relationships between crystallinity, dielectric properties, and location of the dielectric relaxation peak on the frequency and temperature scales were studied for poly(ethylene terephthalate). Also, the dielectric loss factor decreases with increased crystallinity at 2.45 GHz and 4 GHz within the temperature range studied.

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