Influence Of Composition Ratio Research Articles

Correction to: Influence of composition ratio on structural, optical and magnetic properties of NiFe2O4/(1 − x)MnO − xCoO composites

Correction to: Influence of composition ratio on structural, optical and magnetic properties of NiFe2O4/(1 − x)MnO − xCoO composites

Influence of composition ratio on structural, optical and magnetic properties of NiFe2O4/(1−x)MnO−xCoO composites

Influence of composition ratio on structural, optical and magnetic properties of NiFe2O4/(1−x)MnO−xCoO composites

Influence of composition ratio on the thermal performance of AlNB nanocomposite for an efficient heat spreading in solid-state lighting package (LED)

Influence of composition ratio on the thermal performance of AlNB nanocomposite for an efficient heat spreading in solid-state lighting package (LED)

Electrochemical performance of quaternary (1-x)ZnMn2O4/(x)MgFe2O4 solid solution as supercapacitor electrode

Novel nano quaternary metals solid solutions from MgFe2O4 and ZnMn2O4 were synthesized using a sol-gel procedure. The development of a solid solution and the formed phase were examined by phase analysis utilizing the X'Pert High Score Plus program and Fourier transform infrared (FTIR) spectroscopy technique. Rietveld analysis of X-ray diffraction data (XRD), scanning electron microscope (SEM/EDS) and transmission electron microscope (TEM) were applied to determine the lattice parameters, crystallite size, different cations distribution and elemental analysis of the formed solid solutions. The measured dielectric properties of obtained solid solutions are found to be affected by the composition ratio (x). The solid solution (1-x)ZnMn2O4/(x)MgFe2O4 samples exhibited a ferroelectric–paraelectric transition at ferroelectric Curie temperature (Tc). The different hopping mechanisms in the different samples were also examined. The electrochemical performance was tested and influence of composition ratio (x) on the cathodic and anodic potential was investigated. The specific capacitance (Cs) value of electrodes depended on the composition ratio (x) beside the type of cations forming oxides. The (0.9)MgFe2O4/(0.1)ZnMn2O4 sample showed the best performance as a supercapacitor material. The outstanding electrochemical property of the (0.9)MgFe2O4/(0.1)ZnMn2O4 electrode was further confirmed by EIS inspection. The super stability of MgFe2O4/ZnMn2O4 solid solution could be attributed to the activation of the solid solution materials during the CV cycling and the synergistic effects.

Influence of composition ratio on the performances of kesterite solar cell with double CZTS layers—A numerical approach

Effects of double CZTS layers with different composition ratio Cu/Zn in which a high copper concentration at the bottom and a low copper concentration at the top on the physical parameters and cell performance of CZTS solar cells by using the one-dimensional SCAPS-1D numerical model have been analyzed and discussed. In this study, it is demonstrated that a numerical analysis can provide informative predictions of the CZTS solar cell's performance proposed. The agreement between simulated and observed data was sufficient to indicate that the general response of the cell performance is reasonably represented. The high Cu/Zn ratio of the bottom layer was shown as very influential on the parameters of solar cells, where: (i) this bottom layer becomes an electrical mirror for the minority carriers, (ii) effective surface recombination velocity reduce, (iii) Auger recombination mechanism become more important, (iv) high efficiency depends strongly on the larger thickness of top layer, and finally (v) bandgap energy of bottom layer decreases and achieved best cell performance.

Composition-Ratio Influence on Resistive Switching Behavior of Solution-Processed InGaZnO-Based Thin-Film

The influence of composition ratio on the bipolar resistive switching behavior of resistive switching memory devices based on amorphous indium-gallium-zinc-oxide (a-IGZO) using the spin-coating process was investigated. To study the stoichiometric effects of the a-IGZO films on device characteristics, four devices with In/Ga/Zn stoichiometries of 1:1:1, 3:1:1, 1:3:1, and 1:1:3 were fabricated and characterized. The 3:1:1 film showed an ohmic behavior and the 1:1:3 film showed a rectifying switching behavior. The current-voltage characteristics of the a-IGZO films with stoichiometries of 1:1:1 and 1:3:1, however, showed a bipolar resistive memory switching behavior. We found that the three-fold increase in the gallium content ratio reduces the reset voltage from -0.9 to - 0.4 V and enhances the current ratio of high to low resistive states from 0.7 x 10(1) to 3 x 10(1). Our results show that the increase in the Ga composition ratio in the a-IGZO-based ReRAM cells effectively improves the device performance and reliability by increasing the initial defect density in the a-IGZO films.

Composition-Dependent Characterization of Sb2Te3 Thin Films Prepared by Ion Beam Sputtering Deposition

The optimization of ion beam sputtering deposition process for Sb2Te3 thin films deposited on BK7 glass substrates is reported. The influence of composition ratio on the thermoelectric properties is investigated. X-ray diffraction shows that the major diffraction peaks of the films match with those of Sb2Te3. Hall effect and Seebeck coefficient measurement reveal that all the samples are of p-type. The Sb2Te3 thin films exhibit the Seebeck coefficient of 190 μVk−1 and the electrical conductivity of 1.1 × 103 Scm−1 when the atomic ratio of Sb to Te is 0.65. Carrier concentration and motility of the films increase with the increasing atomic ratio of Sb to Te. The Sb2Te3, film with a maximum power factor of 2.26 × 10−3 Wm−1K−2 is achieved when annealed at 400° C. Raman measurement shows that the main peaks are at about 120 cm−1, 252 cm−1 and 450 cm−1, in agreement with those of V-VI compound semiconductors.

Influence of composition ratio on properties of Cu 2ZnSnS 4 thin films fabricated by co-evaporation

The influence of composition ratio on the properties of Cu 2ZnSnS 4 thin films fabricated by co-evaporation has been investigated. From the results of X-ray diffraction analyses, the full width at half maximum of the 112 diffraction peak becomes narrower with increasing Cu/(Zn + Sn) ratio, and the normalized intensity of the 112 diffraction peak becomes stronger with approaching stoichiometry. According to the scanning electron microscope observation, the grain size becomes larger with increasing Cu/(Zn + Sn) ratio, indicating the enhancement of the grain growth under Cu-rich growth condition. The electrical properties also depend on Cu/(Zn + Sn) and Zn/Sn ratios.

The influence of composition ratio on the morphology of biomedical polyurethanes

Two series of thermoplastic polyurethane elastomers were synthesized from 4,4′-methylenediphenyl diisocyanate (MDI), 1,4-butanediol (BDO) chain extender, and each of poly(tetramethylene oxide) (PTMO) and poly(hexamethylene oxide) (PHMO) macrodiols. The PTMO and PHMO molecular weights were kept constant at 993 and 852 g/mol, respectively. In the PTMO-based series, the composition ratio was varied between 48 and 58% (w/w) of macrodiol; 2 commercially available PTMO-based polymers were also included. These were Pellethane 2363 80A® and its harder counterpart, Pellethane 2363 55D®. In the PHMO-based series, the composition ratio was varied between 50 and 60% (w/w) of macrodiol. The materials were characterized by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), wide-angle X-ray diffraction (WAXD), and small-angle X-ray scattering (SAXS). Mechanical performance was also assessed by tensile testing, stress hysteresis, and hardness testing. Altering the composition ratio had a similar effect on morphology and properties for both the PTMO and PHMO-based series. An increase in hard segment content was associated with increased hard microdomain crystallinity, hardness, and stiffness. In both series, he beginning of hard microdomain interconnectivity was observed at a composition ratio of 52% soft segment. That is to say, for the processing and annealing conditions employed, macrodiol contents of 52% and below began to produce continuous, rather than discrete, hard microdomains. Pellethane 80A® was shown to have a discrete hard microdomain morphology, while Pellethane 55D® was shown to incorporate interconnecting hard microdomains. It is suggested that the superior biostability performance of Pellethane 55D relative to Pellethane 80A may be related to its interconnecting hard microdomain texture. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 937–952, 1999

The influence of composition ratio on the morphology of biomedical polyurethanes

Two series of thermoplastic polyurethane elastomers were synthesized from 4,4′-methylenediphenyl diisocyanate (MDI), 1,4-butanediol (BDO) chain extender, and each of poly(tetramethylene oxide) (PTMO) and poly(hexamethylene oxide) (PHMO) macrodiols. The PTMO and PHMO molecular weights were kept constant at 993 and 852 g/mol, respectively. In the PTMO-based series, the composition ratio was varied between 48 and 58% (w/w) of macrodiol; 2 commercially available PTMO-based polymers were also included. These were Pellethane 2363 80A® and its harder counterpart, Pellethane 2363 55D®. In the PHMO-based series, the composition ratio was varied between 50 and 60% (w/w) of macrodiol. The materials were characterized by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), wide-angle X-ray diffraction (WAXD), and small-angle X-ray scattering (SAXS). Mechanical performance was also assessed by tensile testing, stress hysteresis, and hardness testing. Altering the composition ratio had a similar effect on morphology and properties for both the PTMO and PHMO-based series. An increase in hard segment content was associated with increased hard microdomain crystallinity, hardness, and stiffness. In both series, he beginning of hard microdomain interconnectivity was observed at a composition ratio of 52% soft segment. That is to say, for the processing and annealing conditions employed, macrodiol contents of 52% and below began to produce continuous, rather than discrete, hard microdomains. Pellethane 80A® was shown to have a discrete hard microdomain morphology, while Pellethane 55D® was shown to incorporate interconnecting hard microdomains. It is suggested that the superior biostability performance of Pellethane 55D relative to Pellethane 80A may be related to its interconnecting hard microdomain texture. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 937–952, 1999