Materials Literature
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Novel warm-white emitting phosphors CaIn2O4:Dy3+ co-doped with Gd3+, Zn2+, or Al3+ ions were prepared by solid state reaction. In this paper, a strategy of co-doping with different ions was used with the aim of affecting the luminescence properties of CaIn204:0.6%Dy3+ under NUV excitation. The luminescence intensities…
Area of Kaduna,Kaduna state, Nigeria,in two litre plastic jerrycans.Two drops of concentrated nitric acid were to each container in order to preserve the samples. The total dissolved solids (TDS) were determined for the water samples. An aliquot of each sample was evaporatated to dryness,and transferred to a planchet.…
Here we present a morphology controlled growth of nano ZnO through variation in precursor composition and controlled microwave (MW) exposure time. The ZnO nanostructures are synthesized by MW aided co-precipitation method. The SEM micrograph shows that the as obtained ZnO nanostructures show significant variation in m…
The structure and the mechanical properties of high-nitrogen austenitic 05Kh21G9N7AMF (0.56% N) and 04Kh22G12N4AMF (0.49% N) steels have been studied after hot rolling. It is found that the temperatures of the onset and end of hot deformation influence the structure and the mechanical properties of these steels. The h…
In the present work, we consider a modulated point source in an arbitrary motion in an isotropic planarly layered waveguide. The radiation field generated by this source is represented in the form of double oscillatory integrals in terms of the time and the frequency, depending on the large parameter λ . By means of t…
In this study, the effect of finite strain on bending of the geometrically nonlinear of micro laminated composite Euler-Bernoulli beam based on Modified Couple Stress Theory (MCST) is studied in thermal environment. The Green-Lagrange strain tensor according to finite strain assumption and the principle of minimum pot…
The results of a pilot study of the structure and properties of cellulose diacetate filtration membranes with solid fillers are reported; thermally treated millet thresh waste (millet glume) was used as a filler. The porosimetric parameters of the initial polymer and solid fillers, the rheological properties of moldin…
A variety of open and closed multi-layered nanoparticle structures have been considered analytically and numerically for their use as scatterers and radiators. These include metamaterial-inspired structures based on dielectrics and metals excited by either plane waves or electric Hertzian dipoles at optical frequencie…
Persistence of skin wounds due to underlying disease, bacterial contamination, and/or repeated trauma, causes a chronic condition where a functional extracellular matrix (ECM) cannot be established and the normal wound-healing cascade is unable to progress. These open chronic wounds leave the body susceptible to infec…
A metamaterial-based lens, calculated using transformation optics concept, is designed using electric-LC resonators. A planar microstrip antenna source is used as transverse electric polarized wave launcher for the lens. Both the far field radiation patterns and the near-field distributions have been measured to exper…
Orientation relationships between crystals are considered on the base on disorientation distribution function. The distribution of limit disorientation angles is obtained taking into account the symmetry of crystals. Maximum values of limiting disorientation angles for some crystallographic axis are calculated. Distri…
Increasing the amount of filler in paper is of high interest for paper industry while maintaining its key sheet quality properties. In this study, a MFC-GCC composite, made through a co-grinding NBSK (Northern bleached softwood kraft) pulp with a ground calcium carbonate (Intracarb 60), was used as a strength aid in p…
Effect of radiation-induced change of mechanical properties of Fe-5 wt.% Mo alloy irradiated with electrons (2 MeV) at room temperature and 400°C has been investigated. Mechanical properties were estimated by Miniaturized Disk Bend Test technique. Effect of radiation softening of the alloy is ascertained the value of…
Phase composition and structure of mesostructured materials, titanium dioxide and titanium dioxide modified with silver nanoparticles, have been studied by X-ray diffraction analysis. Introduction of Ag(I) ions into the initial composition and variation of the annealing temperature over the 500–950°C range allows cont…
A low-cost and high-efficiency hybrid semi-adiabatic enclosure is proposed. The principle behind it consists in extracting generated heat using natural convection or forced air when the ambient temperature allows it. Outside of this range, for low ambient temperatures, a reduced heat exchange to the minimum optimal te…
철도차량의 안정성과 신뢰성을 위해 상시 자가진단 시스템의 필요성이 높아지고 있다. 통상적으로 이러한 모니터링 시스템에는 유선 센서가 쓰여 왔는데, 설치 장소의 제약이 적은 무선 센서의 활용과 유지보수의 문제를 위해서는 무선 센서의 전원 문제를 해결하여야 한다. 따라서 본 연구에서는 고속으로 주행하는 차량 주변의 에너지를 활용하여 친환경적이면서 반영구적인 자가 발전의 방편으로 열전 발전의 적용성을 검토하였다. 차량의 주행 조건에 따라 열전 발전 모듈이 설치될 차축 베어링 커버의 온도 차이에 대한 측정이 먼저 이루어졌고, 여기에 상용 열전 소자 모듈을 장착하여 그 성능…
The proposed combined thermo-hardening processing of gray cast iron enables to control the surface layer structure and mechanical properties formation. The processing includes high-speed heating by low-temperature plasma source and ultrasonic surface plastic deformation. The algorithm of calculation the stress-strain…
Regulation of optical properties and electronic structure of two-dimensional layered ReS 2 materials has attracted much attention due to their potential in electronic devices. However, the identification of structure transformation of monolayer ReS 2 induced by strain is greatly lacking. In this work, the Raman spectr…
The comparative analysis of the reflection electron energy loss spectra and the inelastic electron scattering cross-section spectra for Mn was carried out.It is shown that inelastic electron scattering cross-section spectra have certain advantages in the study of the interaction of electrons with the substance as comp…
In the present work, mono-disperse and uniform orthorhombic lutetium fluoride (LuF3) nanocrystals with an average size of about 35 nm have been successfully synthesized by a simple ionothermal method without any template. The infrared (IR) to visible up-conversion (UC) photoluminescence of LuF3 doped with Yb3+, Tm3+,…