Materials Literature
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X-ray diraction topography is one of basic diagnostics tools serving for visualisation of single crystal lattice defects. Defects of various kinds can be observed. The present study is a review of topographic results obtained in the X-ray laboratory of the Institute of Experimental Physics, University of Warsaw, for t…
We investigate the impact of rotational symmetry of the metamaterial perfect absorber on its performance. The calculated results show that a absorption peak appears at the same wavelength in the absorption spectrum no matter the polarization of the incident light parallels to x axis or y axis when the absorber possess…
Fabry-Perot cavity antennas, while offering design simplicity and high directivity, are promising candidates for microwave and millimeter wave communication links. Recommendations for effectively truncating the 1-D/2-D periodic structures, designed to act as superstructures in such antennas, are presented. It is shown…
This paper presents expressions that make it possible to calculate the third- and fifth-order aberrations of a volume holographic optical element (HOE) recorded by means of a cylindrical reference wave and a spherical object wave. It is shown that the aberration coefficients of this volume element can be represented a…
This paper describes a hardware design of a fully digital wideband PD meter based on application of FPGA as well as design of coupling device required for PD measurements. The designed coupling device has frequency bandwidth of 1 kHz-10 MHz. The PD signal is digitalized by a fast 14-bit AID convertor sampling at frequ…
The proposed formula relates the maximum magnetic permeability μ m of magnetically hard steel to its coercive force and residual magnetization. The calculation results may be used in nondestructive quality assessment of heat treatment and in magnetic structural analysis of steel, instead of the measurement of μ m , wh…
We measured the electrical resistivity of CeCu2Ge2 under various high pressures and strong magnetic fields. Beyond the previous antiferromagnetic critical pressure P c }~ 8 GPa, the antiferromagnetic phase is found to exist at much higher pressure of 10.9 GPa even in magnetic fields up to 8 T. The pressure vs. tempera…
The equilibrium potentials of praseodymium-diluted homogeneous Pr-Ga-In alloys in a (Li-K-Cs)Cl eut -based salt electrolyte were measured between 573–1073 K by the emf method. These potentials are used to calculate the activity coefficients of α-praseodymium in liquid Ga-In eutectic alloys. PrIn 3 alloy with well-know…
Using the bi- and mono-triazole ligand, a series of novel cobalt(II) complexes [Co(L1)2(NCS)2(H2O)2] (1), [Co2(NCS)4(H2O)6]·3L2 (2) and [Co(L3)2(NCS)2(H2O)2] (L1 = 4–3-pyridine-1,2,4-triazole, L2 = 1,4-bis(4H-1,2,4-triazol-4-yl)benzene, and L3 = 2,6-di(1,2,4- triazol-4-yl)pyridine) have been synthesized. The crystal s…
Three-dimensional Integrated-circuit (3DIC) needs coatings with both high thermal conductivity and high electrical insulation for isolating electronic devices and interconnects while spreading heat generated by stacked integrated circuits effectively. Single crystalline diamond possesses excellent electrical insulatio…
Physical polarization Water Treatment (PPWT) is a new technology that takes advantage of polarization electric field polarizing water molecules to achieve the purpose of scale inhibition and dissolution as well as killing bacteria and algae. The PPWT device made by Shandong Langkun Energy Conservation & Environmental…
Pr0.5Ca0.5CoO3 exhibits a non-conventional metal-insulator transition (MIT) in which the insulating state is due toa volume contraction (∼2%) and electron transfer from Pr to Co sites. Pr1−x Ca x CoO3cobaltites with Ca doping around x ∼ 0.5 (0.45 ≤ x ≤ 0.55) have been investigated. Different ground states and phase tr…
An electromagnetic wave dispersion equation in a metamaterial consisting of an array of split-ring resonators (SRRs) is derived for the determination of stop bands and passbands, showing the kind of wave which propagates, whether it is forward or backward. This derivation takes into account the magnetic coupling betwe…
Thermal stabilization effect of tris(hydroxymethyl)aminomethane (TRIS) in poly(vinyl chloride) (PVC) is studied. Discoloration tests and dehydrocholorination tests show that PVC films containing TRIS as the unique main stabilizer present excellent initial color and long-term stability, compared with all their control…
The transverse magnetoelectric effect in two-layer Tb 0.12 Dy 0.2 Fe 0.68 -PbZr 0.53 Ti 0.47 O 3 composites with Tb 0.12 Dy 0.2 Fe 0.68 ferromagnetic layers of various thicknesses are studied over the temperature range of 77 to 423 K at resonant frequencies of the bending oscillations. It is established that for all o…
It is imperative to determine the dependence of the quality and characteristics of the epitaxial film on different growth parameters. A mathematical model has been developed showing the effect of different growth parameters e.g. temperature, TMI and TEG flow rate, molar ratio on epitaxial film. This model is considere…
The corrosion behavior of rebar HRB400 in 3.5 wt.% NaCl solution was investigated, and the tensile mechanical properties after corrosion were tested. The results showed that, with the increase of corrosion time, the corrosion rate of rebar HRB400 increases and the corrosion becomes heavier. Meanwhile, the yield streng…
SF6 gas, an insulation medium used for gas insulated switchgear (GIS), has a high global warming potential, hence the search for an effective alternative is required from an environmental perspective. As one potential alternative, the authors are focusing on N2gas, which has relatively good insulation characteristics…
Antireflective surfaces are often realized by minimizing the refractive index contrast between the air and substrate using subwavelength microstructures. In this paper, we introduce another kind of geometry-induced antireflective surface using multireflection to suppress reflection to a very low extent. This surface i…
The existence of the electromagnetic radiation may lead to diseases, which also includes cancer and cause the repellence of electrical compatibility. The textiles which have electromagnetic shielding effectiveness become more important in modern life. In the research, the PET/ Ni-coated Copper composite yarn were made…