Materials Literature
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Several micro-techniques (confocal laser-Raman microprobe, optical absorption micro-spectroscopy, high-resolution transmission electron microscopy, electron microprobe analysis) were employed in the detailed characterization of radiohaloes in biotites from two Variscan rocks from Germany. The studied biotites are inte…
This paper is concerned with a phase-field model with temperature dependent constraint for the order parameter. In the kinetic equation of the order parameter, we take account of diffusion as well as the undercooled/superheated state which is modelled by means of a hysteresis input–output relation; the input is the te…
The influence of oxygen content on the magnetization and electrical resistivity of Ln0.5A0.5MnO3 (Ln=La, Pr, Nd; A=Ca, Ba) manganites with the perovskite structure is investigated. It is shown that the La0.5Ca0.5MnO3−γ compound undergoes a sequence of transitions from an antiferromagnetic (γ=0) to a spin-glass (γ=0.17…
A thermal gravimetric method was employed to explore the course of dehydration of Na2CO3 · 10 H2O, and Na3CO3 · H2O particles. Experimental data were amassed both in the temperature-increasing and constant temperature mode. Very small sample masses were used in an effort to eliminate an effect of heat and mass transfe…
Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy was used to study the pyrolysis of polyimide (Kapton®). The samples were prepared in a KBr matrix, which did not show pronounced interferences, such as increased emissivity, during the measurements. The pyrolysis of Kapton® reveals pronounced differen…
Abstract The contributions of the so‐called “interface effects” on the overall viscoelastic behavior of SBR reinforced by precipitated silica modified by model sizing agents are evaluated by using micromechanical models in a reverse mode. According to the nature of the coupling agent, two kinds of “interface effects”…
A layer of Y 2 O 3 –Al 2 O 3 , used as a sintering aid, was coated onto the surface of Si 3 N 4 particles by the precipitation of inorganic salts from a water‐based solution containing Al(NO 3 ) 3 , Y(NO 3 ) 3 , and urea. The electrokinetic and colloidal characteristics of the Si 3 N 4 powder were changed significantl…
Recently, the correlation between the 1100 cm −1 Raman band and the sp 3 fraction in amorphous or nanocrystalline carbon films was unambiguously demonstrated. From theoretical and experimental results on carbon-assembled materials, an explanation about the 1100 cm −1 Raman band origin is given. The difficulty to detec…
Abstract A rheooptical method proposed rapidly determines the aspect ratio and polydispersity of small axisymmetric, nonspherical particles. The time evolution of the average orientation angle of optically isotropic, nonabsorbing particles upon inception of a shear flow was monitored by a polarization modulation metho…
Diffuse scattering in titanite has been measured at three temperatures, 0.951 T c , 1.053 T c and 1.177 T c , using synchrotron radiation. T c = 487 K is the temperature of the antiferroelectric paraelectric phase transition. Charge-coupled device (CCD) intensity measurements were centred about the \bar{4}01 reciproca…
This study evaluates the effects of silicone softeners on the dimensional properties of wool fabric. Samples are treated with a simple pad-dry-cure process in an aqueous bath with aminofunctional and epoxyfunctional silicone softeners. The results indicate that dimensional stability and performance properties improve.…
AND APPLICATIONS.The self-assembly technique is a powerful tool to fabricate ultrathin films from organic compounds aiming at technological applications in molecular electronics.This relatively new approach allows molecularly flat films to be obtained on a simple and cheap fashion from various types of material, inclu…
Unsaturated polyesters, based on ω-unsaturated fatty acid esters from oleochemical resources and petrochemical diols, were synthesized via two different synthetic pathways. 9-decenoic and 10-undecenoic acid methyl ester I a, b were transesterified with petrochemical diols to produce the α,ω-alkylene di(un)decenoates I…
The effect of interfacial reactions between Al and SiC on the thermal conductivity of SiC‐particle‐dispersed Al‐matrix composites was investigated by X‐ray diffraction and transmission electron microscopy (TEM), and the thermal barrier conductance ( h c ) of the interface in the Al–SiC composites was quantified using…
Wet hydrofluoric acid at concentrations below approximately 60% is highly corrosive to glass, reactive metals, carbon steel and stainless steels. Nickel alloys offer moderate corrosion resistance over a wide range of acid concentration and temperature. The corrosion behavior of eleven commercial alloys was quantified…
The effects of type and concentration of plasticizers on the mechanical properties and water vapor permeability (WVP) of edible films from fish water-soluble proteins (FWSP) were investigated. Among plasticizers investigated in the present study, glycerol and polyethylene glycol (PEG) gave the films flexible structure…
Conserved amino acid residues of riboflavin synthase from Escherichia coli were modified by site-directed mutagenesis. Replacement or deletion of phenylalanine 2 afforded catalytically inactive proteins. S41A and H102Q mutants had substantially reduced reaction velocities. Replacements of various other conserved polar…
In 2 O 3 doped with 5 wt% SnO 2 (indium-tin oxide(ITO)(5 wt%)) films have been deposited on glass and quartz substrates in a magnetic field generated from three pieces of rare–earth permanent magnets (1.25 T flux density) placed at every 120° angle to surround the plume produced by pulsed laser deposition using an ArF…
The effects of hydrostatic pressure on conjugated polymers, in particular polyphenyls (see Figure for monomer unit) have been studied using photoluminescence, absorption, photo-induced absorption, and Raman spectroscopy. The effect of pressure on the singlet and triplet excitons and polarons allows an understanding of…
We report p-channel metal-ferroelectric-metal-insulator-semiconductor (MFMIS)-field-effect-transistors (FETs) which can operate at a voltage as low as 3.5 V using Pt/SrBi 2 Ta 2 O 9 /Pt/SrTa 2 O 6 /SiON/Si structures. It is shown that the use of the saturated P – E hysteresis loop is effective to improve the data rete…