Dielectric properties of dehydrated NaA zeolite, analyses and calculation of dielectric spectra

2001 ◽  
Vol 3 (15) ◽  
pp. 3229-3234 ◽  
Author(s):  
Tatsuo Ohgushi ◽  
Kazushi Ishimaru
Keyword(s):  
Dielectric Properties ◽  
Dielectric Spectra ◽  
Naa Zeolite

Fabrication and Dielectric Characterization of a Novel Polyimide

2013 ◽  
Vol 395-396 ◽  
pp. 29-32
Author(s):  
Jia Qi Lin ◽  
Pan Pan Zhang ◽  
Wen Long Yang
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Loss Tangent ◽  
Pyromellitic Dianhydride ◽  
Dielectric Spectra ◽  
Dielectric Characterization

A novel polyimide (PI) films with three kinds of monomers was synthesized in this paper. The polyimide unit is derived from Pyromellitic dianhydride (PMDA), 3,3',4,4'-benzophenonetetracarboxylic dianhydride, (BTDA), and 4,4, -diaminodiphenyl ether (ODA). The dielectric properties of the films were measured. The dielectric spectra show that dielectric constant is about 3.7, which is larger than the PI with two kinds of monomers. In addition, the loss tangent and conductivity of the films is quite small, which is important for the practical use of them.

Thermal and dielectric properties of LDPE / NaA zeolite composites

2021 ◽  
Author(s):  
Filip Marinković ◽  
Dušan Popović ◽  
Jelena Jovanović ◽  
Branislav Stanković ◽  
Sanja Jevtić ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Naa Zeolite

Dielectric Properties of Al2O3 Nanofibers/Epoxy Resin Nanocomposites

2013 ◽  
Vol 873 ◽  
pp. 486-491 ◽  
Author(s):  
Yu Xia Zhang ◽  
Hong Zhou ◽  
Yong Fan
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Epoxy Resin ◽  
Hydrothermal Process ◽  
Epoxy Nanocomposites ◽  
Dielectric Spectra ◽  
Low Level ◽  
Alumina Nanofibers ◽  
Epoxy Resin Nanocomposites

In this article, Al2O3 nanofibers have been successfully synthesized by hydrothermal process and Al2O3 nanofibers/epoxy nanocomposites were fabricated by incorporating the Al2O3 nanofibers modified by 3-aminopropyl trimethoxysilane (APTMOS). Dielectric spectra of the nanocomposites were investigated. The effects of Al2O3 morphology and concerntration on dielectric spectra of nanocomposites were discussed. The results showed that the dielectric constant increased smoothly as the alumina nanofibers concentration increasing, but it decreased with increasing frequency. While the dielectric loss increased slightly with increasing frequency, however, it still remained at a low level.

Dielectric Spectroscopy of Biomolecules up to 110 GHz

Frequenz ◽  
2018 ◽  
Vol 72 (3-4) ◽  
pp. 135-140 ◽  
Author(s):  
Eva-Maria Laux ◽  
Elena Ermilova ◽  
Daniel Pannwitz ◽  
Jessica Gibbons ◽  
Ralph Hölzel ◽  
...  
Keyword(s):  
Protein Structure ◽  
Amino Acid ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Bacterial Culture ◽  
Structure And Function ◽  
Measuring System ◽  
Physicochemical Interaction ◽  
Dielectric Spectra ◽  
And Function

Abstract Radio-frequency fields in the GHz range are increasingly applied in biotechnology and medicine. In order to fully exploit both their potential and their risks detailed information about the dielectric properties of biological material is needed. For this purpose a measuring system is presented that allows the acquisition of complex dielectric spectra over 4 frequency decade up to 110 GHz. Routines for calibration and for data evaluation according to physicochemical interaction models have been developed. The frequency dependent permittivity and dielectric loss of some proteins and nucleic acids, the main classes of biomolecules, and of their sub-units have been determined. Dielectric spectra are presented for the amino acid alanine, the proteins lysozyme and haemoglobin, the nucleotides AMP and ATP, and for the plasmid pET-21, which has been produced by bacterial culture. Characterisation of a variety of biomolecules is envisaged, as is the application to studies on protein structure and function.

SYNTHESIS AND DIELECTRIC PROPERTIES OF LIQUID CRYSTALS CONTAINING TWO CYANO GROUPS

1979 ◽  
Vol 40 (C3) ◽  
pp. C3-37-C3-40
Author(s):  
L. A. KARAMYSHEVA ◽  
S. I. TORGOVA ◽  
E. I. KOVSHEV ◽  
M. I. BARNIK
Keyword(s):  
Liquid Crystals ◽  
Dielectric Properties ◽  
Cyano Groups

Investigation of Dielectric Properties of (1-x) Ni0.53Cu0.12Zn0.35Fe1.88O4 ferrite + (x) Gd0.2Ce0.8O3 for Multilayer Chip Inductors

2012 ◽  
Vol 03 (1) ◽  
pp. 71-73
Author(s):  
S. Bharadwaj ◽  
◽  
Suman Kumar Burnwal ◽  
T. Ramesh ◽  
S.R. Murthy ◽  
...  
Keyword(s):  
Dielectric Properties
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