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 effect of water vapor on the oxygen isotope exchange property was investigated for yttria-stabilized zirconia (YSZ) oxide ion conducting ceramics, which is widely used as an electrolyte material for solid oxide fuel cells (SOFCs). A slight amount of water vapor addition made a great enhancement of surface exchange…
This chapter is of an auxiliary nature and contains the modicum of the theory of finite reflection groups and Coxeter groups which we need for a systematic development of the theory of Coxeter matroids. A reflection group W is a finite subgroup of the orthogonal group of ℝ n generated by some reflections in hyperplane…
A simple model considering grain-size distribution is proposed based on the random anisotropy model. When the maximum grain size (Dm) is less than the exchange correlation length and induced anisotropies are sufficiently small, the effective magnetic anisotropy constant (〈K1〉) is given by using a distribution function…
Gallium arsenide nanoparticles have been prepared from GaCl3 and As(NMe2)3 in 4-ethylpyridine. UV spectra and emission luminescence show strong peaks for samples isolated after short reaction times. Time resolved photoluminescence (TRPL) was carried out using time-correlated single photon counting (TCSPC). The emissio…
Synthesis of hyperbranched poly(arylene ether phosphine oxide)s, HB PAEPOs, from bis(4-fluorophenyl)(4-hydroxyphenyl)phosphine oxide, 1a, in the presence of a series of core molecules with systematically altered reactivity of the aryl fluoride groups provides polymers with molecular weights, MWs, controlled by the con…
Single crystalline BaTi2O5 was prepared by a floating zone method. The permittivity of single crystalline BaTi2O5 perpendicular to a (010) plane showed the maximum value of 20500 at 748 K obeying the Curie-Weiss law at higher temperatures. The permittivity perpendicular to (100) and (001) planes were 140 and 70, respe…
ABSTRACT The microwave expansion of glassy, unexpanded amylopectin pellets was studied. Amylopectin was extruded at three levels of specific mechanical energy (483, 809, and 846 kJ/kg), and 35–40% moisture content, without expansion at the die. Glassy pellets were obtained by drying and equilibrating the extrudates at…
Characterization of liquids, pastes, and melts is nowadays becoming increasingly important for industrial applications. The thermal conductivity of a heat-transfer paste is, for example, one of the crucial parameters for the application of the material, and characterization of polymers in the liquid range is important…
The electrical properties of were studied as a function of both oxygen partial pressure and water vapor partial pressure in the temperature range of 500-800°C, and the partial conductivities of protons, holes, and oxygen vacancies were calculated from the proposed defect model. P-type conduction was dominant in an oxi…
A series of chromium-containing mesoporous MCM-48 molecular sieves, (Cr)MCM-48, with varying Si/Cr (25 − ∝) ratios were synthesized hydrothermally, and characterized systematically by various analytical and spectroscopic techniques. The catalytic performance of the materials was evaluated for the oxidation reactions o…
Hydrogen diffusion in steels was examined by both a high sensitivity hydrogen microprint technique (HMT) and an electrochemical hydrogen permeation method. The main diffusion path in an extremely low carbon steel was lattice within grains; grain boundaries were not accelerated diffusion paths. In the case of a hypo-eu…
It has been demonstrated with systematic experiments that the appearance and disappearance of multistage martensitic transformation in aged Ni-rich Ti-Ni alloys depend on the heat treatment atmosphere. No multistage transformation occurs when the evaporation of Ti and Ni and/or the preferential oxidation of Ti in the…
The enthalpies of anion exchange in a chloride-intercalated zinc aluminium layered double hydroxide (LDH) in suspension in water have been studied at 25 °C. The heat effects associated with the exchange of the chloride anions for dicarboxylate anions (oxalate, succinate, adipate and tartrate) have been determined by t…
Permittivity dispersion measurements in a very low frequency range were made on n-pentyl (5CB) and n-octyl 8CB cyano biphenyls, providing characterization of mobile ions by the diffusion coefficient, or the mobility, and their temperature dependence in the nematic phase and/or the smectic A phase. Ionic conduction was…
As an interconnect material, copper has the disadvantage of not forming self-limiting oxides, which can negatively affect device performance and reliability. Undesired oxide layers need to be removed by in situ cleaning, before the copper is subjected to subsequent depositions. We have used ethyl alcohol as a vapor ph…
The complex [Fe(3-bpp)2][Fe(CN)5(NO)] (3-bpp = 2,6-bis(pyrazol-3-yl)pyridine) undergoes an abrupt, thermally-induced 1A1 ↔ 5T2 spin transition associated with a narrow (∼3 K) hysteresis loop (T1/2↓ = 181 K; T1/2↑ = 184 K). The transition is accompanied by a change in crystallographic space group (P4/ncc at 294 K; Pnca…
Growing global concern on environmental health is forcing all the processing industries to adopt greener and cleaner manufacturing practices. Thus, the leather industry is being pressurized to look for cleaner leather processing. The conventional method of leather making involves do–undo logic. This results in the emi…
An effective one step scheme is introduced for immobilization of rutile TiO2 on the sidewall of MWNTs. Three distinct morphologies of hybrid MWNTs were observed and a phenomenological mechanism was developed to explain the results.
Incoherent neutron scattering measurements were performed on polycarbonate (PC), poly(methyl methacrylate) (PMMA), and poly(vinyl chloride) (PVC) films of variable thickness, ranging from bulklike down to 75 Å, or length scales comparable to the polymer's radius of gyration. The temperature dependencies of the incoher…
The interaction of hydrogen peroxide with a range of polycrystalline titanium oxide systems, including TiO2, TS-1, [Ti]-APO-5 and ion-exchanged Ti-ZSM-5, has been investigated using c.w. X-band EPR spectroscopy. Decomposition of the peroxide occurs immediately upon contact with all of the metal oxides investigated, re…