Materials Literature
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Ageing of systems and components in nuclear power plants is a well known phenomenon that must be managed to ensure the continued safe operation of these plants. Much of the degradation due to ageing is controlled through periodic maintenance and/or components replacement. However, there are components such as electric…
The compound Cs3ZnBr5 was synthesized from cesium and zinc bromides. The single crystals were grown by the Bridgman method. The structure of Cs3ZnBr5 was studied. The compound crystallizes in the tetragonal system with the unit cell parameters: a = b = 9.633(2) Å, c = 15.141(5) Å, V = 1404.8(6) Å3, Z = 4, space group…
采用固相法(成型压力~12MPa)获得了Nb改性的Bi 4 Ti 3 O 12 (BIT+ x mol%Nb2O5)层状压电陶瓷. 研究发现随着Nb 2 O 5 含量的增加, a - b 面取向的晶粒逐渐增多, 晶粒尺寸愈细化与均匀. Nb 2 O 5 的引入明显降低了BIT系列陶瓷的导电率和介电损耗, 提高了陶瓷的相对密度﹑压电与机电性能. 适量Nb 2 O 5 ( x =4.00)掺杂时, 陶瓷的电导率(~10?13S/cm)比纯BIT的降低了2个数量级, 且该陶瓷的相对密度 r =98.7%, tan δ =0.23%, d 33 =18pC/N, Q m =2804, k p =8.1%, k t =18.6%, N p…
This paper reports the DC and Radio Frequency (RF) characterization of Ba 0.6 S 0.4 TiO 3 thin films using three different components. For DC characterization, two single circle patch MIM capacitors of different radii are fabricated over Pt/Ti/SiO 2 /Si substrate covered with a 350 nm BST film. The measurement results…
We investigate the distribution of the volume and coordination number associated to each particle in a jammed packing of monodisperse hard sphere using the mesoscopic ensemble developed in Nature 453, 606 (2008). Theory predicts an exponential distribution of the orientational volumes for random close packings and ran…
Abstract Summary: Diffusion of n ‐hexane in poly(ethylene‐ co ‐1‐hexene)s with 15–75 wt.% crystallinity was studied by desorption experiments analyzing data using the Fickian equations with a concentration dependent diffusivity. The effect of the impenetrable crystalline phase on the penetrant diffusivity ( D ) is des…
Electrical, magnetic and Mössbauer measurements have been carried out on La0.67−xEuxCa0.33MnO3 (x=0.21 and 0.29) for a comparative study of different grain size materials. The samples have been prepared through sol–gel method and sintered at 700, 800, and 900 °C to achieve nanosized materials. All the prepared samples…
High-temperature Superconducting (HTS) cable systems with high power density and low loss are expected to be a solution for improving the power grid. Many researchers have worked on the development of the HTS cable. For insulation testing it is necessary to consider a partial discharge (PD) which is generated in butt…
Understanding the complex glassy phenomena, which accompany polaron formation in optimally doped manganites (ODMs) is a cumbersome issue with many unexplained perspectives. Here, on the basis of $^{139}\text{L}\text{a}$ and $^{55}\text{M}\text{n}$ nuclear magnetic resonance (NMR) measurements, performed in the tempera…
The applicability of the heteroepitaxic nucleant method using molecular sieves (MS) to sparse matrix screening of protein crystallization was examined using xylanase as a test protein. The sparse matrix screening with MS provided three crystal forms I−III under 80% of conditions, which confirmed a much higher yield of…
Processes of evaporation and thermodynamic properties of glasses and melts of the system MgO-B 2 O 3 -SiO 2 in the range of 1550–1800 K were studied for the first time by high-temperature mass-spectrometry. The resulting activities and Gibbs energies of components and also corresponding excess values point to negative…
Direct measurements of the magnetocaloric effect (MCE) in RCo5 single crystals in the region of spin-reorientation transitions (SRT) were carried out. It was shown that the values of MCE in the region of SRTs are comparable to the values of MCE in the vicinity of the Curie temperature. The anisotropy constants of the…
Cobalt-doped vanadium oxide thin layers prepared by pulsed laser ablation are investigated from the following points of view: (1) the chemical states by X-ray photoelectron spectroscopy (XPS), (2) the local atomic order by X-ray absorption fine structure at both vanadium and cobalt K-edges, (3) the morphology of the f…
The effect of the electrolyte concentration on the interfacial interactions, rheological properties and emulsion shear stability was investigated. The increase of the electrolyte concentration leads to the growth of storage modulus and the yield stress of emulsions and enhances the emulsion stability to shearing, whil…
The natural bamboo fiber is a green environmental protection type fiber material extracted from bamboo. Compared with other fibers, it has better permeability, unique resilience, transient water absorption, antibacterial activity, deodorant activity, and a strong lateral and longitudinal strength. This paper reviews t…
Design and numerical analyses of the planar grating coupler The paper presents the results of numerical analyses of the structures of integrated optics in the form of planar waveguides made of materials with high values of the refractive index n = 2.00 and with an input-output system in the form of Bragg grating coupl…
The characteristics of the filtration combustion of a carbon-polyethylene-inert material mixture with superadiabatic heating are experimentally studied. It is demonstrated that the composition of the products and the nature of the thermal degradation of the polymer strongly influence the burning rate and thermal struc…
Abstract A method to blend starches and polyethylene, and thus improve the environmental footprint, was investigated. Unlike traditional methods that utilize compatibilizers or rely on reactive extrusion to achieve the desired material compatibility, a high amylose starch, such as Gelose 80, was mixed with native star…
Process induced variation of contact resistance (Rc) in Ti/graphene (single or multi-layer) devices is investigated physically and electrically. It is proposed that the increased Rccan be attributed to the carbon defects (vacancies) created during SPUTTER process, which is evidenced by Raman spectra. For the first tim…
Gold nanorods have a strongly polarized light at their longitudinal plasmon frequency that can be utilized to characterize colloidal gold nanorods and monitor their rotational dynamics in a bulk sample by polarized light scattering microscopy. By monitoring the time trace of the scattering polarization contrast, we co…