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Dielectric constant
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This paper proposes a dual-band PIFA antenna operated at 28/38 GHz for 5G communication systems. The PIFA antenna consists of two dielectric layers and an air gap is inserted between these two layers. Both substrates, namely Roger RT dielectric, have a relative dielectric constant of 2.2 and a thickness of 0.127 mm.
9p
vibego
02-02-2024
1
0
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The electric and magnetic properties of a lithium ferrite (LF) synthesized using the solid state reaction technique have been reported. The XRD studies reveal the cubic nature, from which the crystallite size and the lattice constant are determined to be 16.84 nm and 2.847 Å repectively. The FESEM confirms the coarseness in the samples with a low porosity.
6p
viberbers
09-08-2023
6
3
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ZnO doped with different concentrations (2, 4, 6, 8 and 10%) of ceria was synthesized by the conventional solidestate reaction method. X-ray diffraction spectra confirm that all the samples have a hexagonal structure. The structural properties of the samples were studied from X-ray diffraction data.
7p
viberbers
09-08-2023
5
3
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The surface modification of synthesized nano-BaTiO3 particles was carried out using g-aminopropyl trimethoxy silane (g-APS) in an ethanol/water solution. The modified particles were characterized by FTIR, TGA, surface charge analysis, and by dielectric constant measurement.
8p
viberbers
09-08-2023
3
3
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Results of this investigation have been correlated with the films structural and optical properties. Among the structural properties, surface roughness and morphology, and crystalline quality of the films have been obtained by using the XRD and AFM methods. Additionally, optical properties such as band gap tune-ability and dielectric constant have been determined by spectroscopic ellipsometer.
7p
viberbers
09-08-2023
4
3
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In this study, Bi0.5(Na1–xKx)0.5SnO3 (BNKS) ceramics (x = 0, 0.1, 0.2, 0.3, and 0.4) were fabricated via ultrasound wave before milling. The time of ball milling decreased from 20 to 1 h. The X-ray diffraction patterns show that the BNKS has a single-phase structure.
8p
vispiderman
15-06-2023
4
2
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The thermodynamics involving the dielectric constant and Gibb's free energy of oxide formation at the Al/TiOx and TiOx/TiOy interfaces play a pivotal role in the associated switching mechanism. The spatial variability of the operating voltage across these devices is found to be as low as 8%. These findings pave the way for low power, low cost, and high density data storage applications.
10p
meyerowitz
25-12-2021
6
0
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Lecture Physical chemistry: Physical properties of drug molecules provide students with knowledge about dielectric constant, induced polarization, dipole moment, refractive index, molar refraction, optical rotatory dispersion,...
39p
bachnhuocdong
23-12-2021
16
0
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This research aimed at getting the optimum solvent dielectric constant and ratio teter leaves to solvents on the highest antioxidant activity of teter leaves extract. Response Surface Methodology (RSM) was used for the optimization of extraction conditions with the experimental design was a Central Composite Design (CCD) in two factors, namely solvent dielectric constant and ratio of teter leaves to solvent.
17p
chauchaungayxua12
29-07-2021
13
2
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In this study, we investigate the effect of ZnO on the sintering behavior and physical properties of the PZT−PMnN−PSbN ceramics. We report the dielectric behavior of PZT−PMnN−PSbN + x% wt. ZnO ceramics that are given by the combination of a normal ferroelectric with two above relaxor families.
9p
nguaconbaynhay10
20-02-2021
4
2
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This study determined dielectric constant and dielectric loss factor of bamboo at different moisture contents and frequencies. The main purpose is to provide the dielectric properties of bamboo to determine the parameters of high frequency press technology.
0p
tradaviahe11
04-01-2021
12
3
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he effect of the ZnO addition in pure perovskite PZT−PMnN−PSbN ceramics sintered from 950 to 1200oC has been investigated. The phase structure of ceramics changes from rhombohedral to tetragonal and the temperature decreases with the increase of the ZnO content. The limitation of Zn2+ concentration for the solubility in PZT–PMnN–PSbN systems is about 0.25% wt., at which the ceramic shows some good physical properties such as the density of 8.20 g/cm3 , some dielectric constants including εr = 1,555 and εmax = 32,900.
9p
nguaconbaynhay9
03-12-2020
7
0
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The (1–x)BiFe0.91(Mn0.47Ti0.53)0.09O3–xBaTiO3 (BFMT–BT) lead-free ceramics have been fabricated by using the conventional solid-state reaction method. The phase structure of BFMT−BT investigated with X-ray diffraction shows a single perovskite phase. Although 20% mol of Bi2O3 was added into the raw materials in excess, the evaporation of Bi3+ ions during calcining and sintering processes is from 20 to 30% wt. relative to other elements. The effect of BaTiO3 content on the electrical properties of BFMT−BT ceramic was investigated.
8p
nguaconbaynhay9
03-12-2020
4
1
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The elastic constants and various optical properties of MnIn2S4 including the dielectric constant, absorption coefficient, electron energy loss function and reflectivity were calculated as a function of incident photon energy. Those results are discussed in this study and compared with available experimental results.
9p
tamynhan8
04-11-2020
14
2
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The present work focuses on studying the optical properties of the pristine PEDOT:PSS and the PEDOT:PSS modified with de-ionized water, ethylene glycol and MWCNT. The effect of various additives on the absorption, the refractive index, and the dielectric constant has been inspected. The refractive index dispersion has been analyzed using the single oscillator model developed by Wemple and DiDomenico.
6p
tamynhan4
06-09-2020
8
1
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All the samples exhibit a normal dielectric dispersion behavior, i.e. it decreases with increasing frequency due to the MaxwelleWagner type of interfacial polarization. The ac conductivity data was used to evaluate the maximum barrier height, the minimum hoping distance, and the density of localized states at Fermi level.
7p
tamynhan4
06-09-2020
14
2
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The semiconductor industry needs low dielectric constant (low k-value) materials to more advance microprocessor and chips by reducing the size of the device features. In fabricate this context, a new material with lower k value than conventional silica ( k = 3.9 - 4.2 ) is needed in order to improve the circuit performance. As per the recent International Semiconductor Technology plan, a low-k material with a k = 1.6 will be needed by 2010. The choice of the inorganic zeolite membrane is an attractive option for low k material and suitable for microprocess applicatio.
9p
12120609
01-06-2020
12
1
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Curcumin, a phenolic compound, possesses many pharmacological activities and is under clinical evaluation to treat different diseases. However, conflicting data about its stability have been reported. In this study, the kinetic degradation of curcumin from a natural curcuminoid mixture under various conditions (pH, temperature, and dielectric constant of the medium) was investigated. Moreover, the degradation of pure curcumin at some selected conditions was also determined.
11p
caothientrangnguyen
09-05-2020
14
1
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The paper examines the dielectric properties of bamboo, the humidity and the frequency value of bamboo and their relationship to the dielectric of bamboo. For details of the study content, please refer to the article.
0p
12120609
18-03-2020
12
1
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In this article, a single microstrip antenna for the future 5G mobile networks is designed using Rogers RT5880 substrate with dielectric constant of 2.2, which has a simple rectangle shape with small size.
6p
vimante2711
05-03-2020
38
1
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