Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
LaMnO 3 and ( La , Sr ) MnO 3 were prepared as mesoporous powders using sol‐gel methods that incorporated evaporation‐induced self‐assembly of surfactants as structure‐directing agents. The precursor and surfactant concentrations, surfactant character (mainly molecular weight), aging humidity, and annealing temperatur…
The mechanochemical solid-state synthesis of Zn x Cd 1-x S nanoparticles from zinc acetate, cadmium acetate and sodium sulphide in a planetary laboratory mill is described. Through changing the molar ratio of the Zn and Cd precursors, Zn x Cd1 -x S nanoparticles of different composition were prepared. Structural, surf…
The microstructure, as well as the mechanical and thermal properties, of phosphate glasses (PhGs) doped with rare earth elements (REEs), namely, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Yb, were studied in the present paper. The strength parameters of the PhGs and their dependence on the load value modification were estima…
Starting with a nearest-neighbors tight-binding model, we rigorously investigate the bulk zero-field orbital susceptibility of a non-interacting Bloch electrons gas in graphene-like solids at fixed temperature and density of particles. In the zero-temperature limit and in the semiconducting situation, we derive a comp…
This paper deals with electric field vector characteristics in three-phase gas insulated switchgear (GIS). The electric field in a three-phase construction of a simplified GIS model was analyzed. The results show that the electric field vector varies with phase of applied voltage. While the voltage phase varies in a c…
Microencapsulated ammonium polyphosphate (MEAPP) with a shell of epoxy resin (EP) is prepared by in situ polymerization, and characterized by FTIR and SEM. The results of FTIR and SEM show that APP is microencapsulated by a layer of EP. After microencapsulation, a great improvement in water resistance is observed from…
We discuss the aesthetic appeal of liquid crystal textures and take a brief polarising microscopic tour through the wealth of the appearances of nematic, cholesteric, smectic and banana phases. Some examples are given on how these textures may be used in a creative process employing digital image processing to produce…
A new mechanism has been proposed for synthesizing barium ferrite by sol-gel method. The mechanism takes account of the structure of barium hexaferrite and the least structure change principle. It is useful in optimizing the synthetic conditions.
An acoustic Partial Discharge (PD) location problem modeled mathematically, gives system of sphere equations, which are non-linear. These equations are formed with known acoustic emission (AE) sensors co-ordinates, with PD locations co-ordinates as unknowns. Newton's method is implemented to locate the PD activity usi…
Spin-capable multiwalled carbon nanotube (MWCNT) forests that can form webs, sheets, and yarns provide a promising means for advancing various technologies. It is necessary to understand the critical factors to grow spin-capable carbon nanotubes (CNTs) in a repeatable fashion. Here we show how both the spinning capabi…
In this work, we report detailed investigations on the structural and magnetic properties of pure and Co-doped CeO 2 nanoparticles. All the samples, with different cobalt concentrations, were prepared by the co-precipitation method. To investigate the structural properties and phases present in the samples, systematic…
The effect of La addition on the microstructure and phase transformation behavior of Ti 49.3 Ni 50.7 alloy is investigated by optical microscope (OP), scanning electron microscope (SEM), X-ray diffraction analysis (XRD) and differential scanning calorimeter (DSC). The results show that the microstructure of Ti-Ni allo…
In this paper, an improved tunable phase shifter with broadband and wide range of the phase shift is proposed. The structure consists of two improved tunable composite right/left handed (CRLH) transmission line (TL) unit cells. A π-shape circuit model is adopted for each unit cell, and its phase characteristic is disc…
The pair force interaction potential that allows one to describe a deviation from spherical symmetry, which is typical for hexagonal close-packed structures, is constructed using the “spherically symmetric” Mie potential that depends only on the interatomic distance. The parameters of the considered potential, which e…
The hydroisomerization of n -dodecane on bifunctional catalysts with mesostructured aluminosilicates as an active component has been studied. Aluminosilicates with an Si/Al atomic ratio of 5 to 48 have been prepared using hexadecylamine as a template. Catalyst supports contained 35 wt % mesoporous material and 65 wt %…
Possible routes to generate berthollide phases are considered, specifically, via the separation of part of a component-based solid solution due to morphotropic transitions and as a result of the intersection of the binodal line with the solidus curve. Particular example phase diagrams are given for binary systems cont…
The effect of the structure and size of grains on changes in the microrelief and optical characteristics of specimens of mirrors made of copper alloys with substantially differing grain size upon bombardment by ions of deuterium plasma are studied. Based on a comprehensive study of the structural features of the surfa…
Nano alumina particles and nano titanium dioxide particles are incorporated with low density polyethylene to fabricate samples, respectively. The breakdown performance of samples is conducted in the transformer oil. Results indicate that both ac breakdown strength and dc breakdown strength of nanocomposites with appro…
Abstract Based on a mean-field approach a 3D grain growth model is presented which predicts the growth history of individual grains of a grain ensemble in terms of linear grain size and time. The analytical results are compared with the results of numerical simulations using the Monte-Carlo-Potts model. In addition, b…
An alternating current magnetic susceptometer for use as a hydrogen gauge for hydrogen-storage materials was designed and developed. The experimental system can simultaneously measure the hydrogen equilibrium pressure and the magnetic susceptibility of metal hydrides. The background voltage of the susceptometer was st…