Materials Literature
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Phosphate glasses of composition x PbO - 10 ZnO - (90-x) P 2 O 5 , 30 ≤ x(mol. %) ≤ 55 (series A); 50 PbO -x ZnO - (50-x) P 2 O s , 0 ≤ x(mol %) ≤ 20 (series B); and x PbO - (60 - x) ZnO - 40 P 2 O 5 , 0 ≤ x(mol %) ≤ 60 (seriesC), were investigated. Experimental values of the refractive index (n) [1.59 ≤ n ≤ 1.87] wer…
III-V solar cell technology is reviewed. Difierent fabrication processes for III-V semiconductor materials, cell designs and applications are presented. The two main growth techniques are molecular organic chemical vapor deposition (MOCVD) and molecular beam epitaxy (MBE), with growth control to a monolayer precission…
New liquid crystals and organogelators with a cholesteryl benzoate skeleton were prepared. Cholesteryl 4-alkoxy- and 3,4-dialkoxybenzoates had enantiotropic cholesteric and smectic A phases, while 3,5-dialkoxy- and 3,4,5-trialkoxybenzoate derivatives were not mesomorphic. Furthermore cholesteryl 4-alkoxy- and 3,4-dial…
We study the Schrödinger equation for an off-diagonal tight-binding hamiltonian, as well as the equations of motion for out-of-plane vibrations on the separable square Fibonacci quasicrystal. We discuss the nature of the spectra and wave functions of the solutions.
Crude oil/water emulsion stability is one of the major obstacles to efficient off-shore separation of undesired aqueous phase. Chemical demulsifiers based on polysiloxanes have been successfully tested as accelerators of phase separation but the mechanism of coalescence is not fully understood. Better understanding of…
An aqueous solution of disodium cromoglycate (cromolyn) is known to form the chromonic N phase (i.e. a nematic lyotropic columnar phase) at room temperature and concentration range 13–17%, and the corresponding N∗ twisted nematic phase if chiral dopants are added. We have produced lyotropic liquid crystal films and ce…
The temperature dependence of the photoluminescence (PL) spectrum of silicon quantum dots (QDs) is studied both theoretically and experimentally, and the time of the corresponding electron-hole radiative recombination is calculated. The dependence of the recombination time on the QD size is discussed. The experiment s…
Glass fiber/bamboo fiber hybrid BMC laminates were fabricated by compression molding, and their physico-mechanical properties were investigated. To improve their properties, many factors (constituent's ratio, process conditions, bamboo fiber content) were varied. The composite material reinforced with 25wt% hybrid fib…
Six kinds of powder samples with a different particle size and its distribution have been prepared from coprecipitated precursors by light grinding followed by sieving, and calcined in air to form the barium ferrite (BaFe12O19) phase. Correlation between the particle morphology and Fe/Ba molar ratio or magnetic proper…
Electrooptical effects in ferroelectric liquid crystal cells have been simulated and the calculation results have been compared with experiments. Two sets of equations have been solved numerically: (1) the dynamic equations for the director coupled with the electric current equation; (2) the Maxwell equations which al…
Potentiostatic cathodic electrodeposition of ZnTe was investigated from the viewpoint of the effect of pH on the deposits' composition and crystallinity using citric acidic electrolytic baths, in which Zn(II) and Te(IV) species were dissolved to form ZnH2Cit+, ZnHCit, ZnCit−, Zn(Cit)24− and HTeO2+, HTeO3−, respectivel…
Efficient hydrogen evolution from decalin by heating at 210°C and cooling at 5°C was attempted in a batch-wise reactor by the use of “superheated liquid-film-type catalysis”. When the carbon-supported metal catalyst 0.75 g was immersed with decalin 3.0 ml under a reactive distillation conditions, a liquid-film state w…
The first bioinorganic vanadocene(IV) complexes of α-amino acids ([Cp 2 V(aa)]Cl, Cp = η 5 -C 5 H 5 , aa = glycine, L-alanine, L-valine) were prepared by reaction of vanadocene dichloride ([Cp 2 VCl 2 ]) and α-amino acids in aqueous methanol. Analogous cationic complexes with PF 6 - counterions were obtained by metath…
The thresholdless, hysteresis-free V-shape electrooptical switching in surface stabilized ferroelectric liquid crystal (FLC) cells has been modeled and the results compared with experimental data. High frequency V-shape switching (at f>100 Hz) was experimentally demonstrated and simulated numerically. The key role of…
Uniformly porous composites with 3‐D network structure (UPC‐3D) have been recently developed via a pyrolytic reactive sintering process, which takes advantage of the evolved CO 2 gas from a decomposing carbonate source (e.g., dolomite, CaMg(CO 3 ) 2 ) and does not require any additional pore‐forming agent nor long‐tim…
This paper is in four parts. The first is related to general considerations and experimental analyses, and each of the others is related to different approaches to theoretical analyses of the mechanical behaviour of weft-knitted fabrics and weft-knitted reinforced composites made of glass fibre. The objective is to fi…
Abstract Although glass corrosion resistance has been tested with laboratory methods for decades, investigators are now just beginning to understand the reaction phenomena at or close to saturation with respect to the rate-limiting phase(s). Near saturation, the phenomena that govern element release rates include alka…
Stratified systems comprising an inhibitor-doped layer-by-layer (LBL) clay-polyelectrolyte overcoated with a dense organically-modified silicate (Ormosil) are investigated as corrosion protectors for aluminium. As separate coatings, neither the LBL nor Ormosil films were found to provide adequate corrosion protection…
Periploca sepium is used in Chinese crude drugs and widely employed as a tonic. The volatiles obtained by steam distillation (yield, 0.10%) included 4-methoxysalicylaldehyde (87.8%), furfural (3.13%), and lavender lactone (0.77%) as the major components.
An attempt was made to fabricate composite material of an Al alloy matrix reinforced by TiNi shape memory fiber using a hot-press method and to investigate its microstructures and mechanical properties. The analysis of SEM and EDS showed that the composite material had good interface bonding. The stress-strain behavio…