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。
The kinetics and the mechanism of thermal decomposition of ultrahigh-molecular-weight polyethylene without additive and with TPP additives in oxidative and inert media has been studied using the method of differential mass-spectrometric thermal analysis at a high heating rate and the method of thermogravimetric analys…
Piezoelectric composites made from lead zirconate titanate (PZT) and cement are developed as sensors in smart concrete structures due to its compatibility to the host structure concrete. In this work, PZT ceramic-Portland cement composites of 2–2 connectivity were produced using a dice and fill method and their dielec…
The AC electrical conductivity (σ) of polycrystalline NaNO2 and SiO2-NaNO2 composite, prepared by embedding of sodium nitrite into porous glasses with 7, 46 and 320 nm average pore diameter, have been studied at frequencies of 0.1 Hz–1 MHz within temperature range of 300–500 К. It was found a considerable increase of…
Heat-engines using shape memory alloy (SMA) were expected to be employed as heat-engines driven by low-temperature thermal energy. Therefore, some trial products of heat-engines using SMA were produced and studied. However, since the inhomogeneous temperatures of the SMA element result during heating / cooling of the…
The design work of the spatial pivotal roof with a cut-out in the elliptic setting formed by the system of rigid threads through the sections based on determination of a numerical safety index of a designed structure has been described. The proposed method provides the sequence of solution of problem series: determina…
Recent years have witnessed tremendous progress in the design and synthesis of electroactive materials for the fabrication of organic electronic devices. However, very little research effort has been devoted to developing organic packaging materials, which are crucial for the efficient functioning of the devices. Poly…
The photoluminescence anisotropy in initially disordered quantum rod ensemble induced by selective photochemical reaction under continuous irradiation with polarized light is demonstrated. A specific long-time relaxation of the photoinduced anisotropy in darkness, which is attributed to rotational diffusion of nanocry…
Two representatives of Ni(Co)-Mn-Al metamagnetic shape memory alloy system, Ni45Co5Mn31Al19 and Ni35Co15Mn35Al15, have been studied with respect to their magnetocaloric properties. Experimental study of the magnetocaloric effect by a direct measurement of the adiabatic temperature change ΔTad revealed that in both the…
A bis(terpyridine)iron network polymer was fabricated by electropolymerisation on a glassy carbon electrode. The modified electrode allowed high-speed charging and discharging with a minor capacity decay (only 5% after 3000 cycles at 1 V s(-1)).
Emerald green crystals of the new composition CuHPO 4 were synthesized and compared to (copper metaphosphate) Cu 2 P 4 O 12 and (copper ultraphosphate) Cu 2 P 8 O 22 . Various copper ultraphosphate and metaphosphate glasses of different compositions between pure P 2 O 5 and Cu 2 P 4 O 12 were melted in crucibles or in…
Cenospheres are produced in very large amount in thermal power plants. They are always looked upon as fillers used to reduce the density and cost of the polymer. If cenosphere particles are allowed to remain properly dispersed by taking it in lower concentration, significant improvement in its mechanical, thermal, ele…
Generation and propagation of ultrasonic waves in single layer Graphene Nanoribbon is studied using semi-classical approach. When piezoelectric Graphene Nanoribbon (GNR) is exposed to time varying light beam, ultrasonic waves are produced which propagate in the medium. At low frequencies, we observed oscillations of t…
Autofluorescence is pervasive throughout the natural world and occurs in many animals, plants, and minerals. Fluorescent properties vary predictably over molt cycles of arthropod exoskeletons. This study examines intrinsic fluorescence in scorpions and crustaceans using novel fluorometric analyses and microscopy. Anch…
The objective of this workshop was to focus on new directions in carbon nanomaterial research, with a particular focus on new frontiers in nanotube alignment and applications of nanofluids. The first Carbon Nano Material Workshop was held at the Radisson Hotel, Rapid City, South Dakota, from October 30 to November 1,…
The thermal and dielectric anomalies of window-type glasses at low temperatures (T < 1 K) are rather successfully explained by the two-level systems (2LS) standard tunneling model (STM). However, the magnetic effects discovered in the multisilicate glasses in recent times, magnetic effects in the organic glasses, and…
The catalytic activity of B-N-Fe and Si-N-Fe compositions toward formaldehyde degradation in aqueous solutions by ozonation and UV irradiation was examined in relation to the time of exposure, phase composition and weight of the catalyst, and amount of oxalic acid added. The conditions for complete degradation of form…
Nanocomposites were obtained by mixing terpolymer and carbon nanotubes (CNTs) in a twin-screw extruder at 135–155°C. The results indicated that increasing the amount of PSt, the molecular weight of PSt macromonomer of terpolymers and CNTs charged resulted in improving the tensile strength and modulus at 300% elongatio…
Absolute luminous flux and quantum yield for multichannel transition emissions have been determined in samarium ion (Sm 3+ )-doped cadmium-aluminum-silicate (CAS) glasses under the pumping of blue light emitting diode (LED) using an integrating sphere of 30 cm diameter, which connected to a CCD detector with a 400 μm-…
The g-factor formulas for d(1) ions in anatase are deduced from the Jahn-Teller effect and contributions of the charge transfer levels. The tetragonal distortions R∥-R⊥ (where R∥ and R⊥ denote the metal-ligand distances parallel with and perpendicular to the tetragonal axis) for Ti(3+), V(4+) and Cr(5+) in anatase are…
The cationic manganese porphyrin (Mn-TMPyP) was activated by an oxygen atom donor KHSO5 (oxone) to form a high-valent manganese-oxo species (MnVO) in aqueous buffer. The high-valent MnVO mediated oxidative damage of short double-stranded DNA models. The nature of the oxidation products (guanine oxidation DGh, 2Ih, imi…