Materials Literature
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Abstract Mono‐ and di‐esterified glycerols were synthesized by the base catalyzed reaction of glycerol with aliphatic dicarboxylic acid esters (C 2 −C 9 ): 2,3‐dihydroxy‐propyl oxalate ( 2 ), 1,3 dioxalyloxy propan‐2‐ol ( 3 ), 1,3‐dimethoxyoxalyloxy propan‐2‐ol ( 5 ), 2,3‐dihydroxy‐propyl malonate ( 6 ), 2,3‐dihydroxy…
We’ve built this digital research platform to provide academics everywhere with fast, stable and secure digital access to our library of over 110,000 scholarly books and 800,000 journal articles. We’ve tested the platform in close cooperation with leading academic institutions. If you have any questions or you notice…
Poly(ethylene glycol) (PEG) monolayer was formed through the chemisorption of a vapor phase organosilane. Photochemically cleaned silicon substrate covered with native oxide (SiO2/Si) was exposed to a vapor of an organosilane, that is, 2-(methoxy[polyethyleneoxy]propyl) trimethoxysilane (MPEOPS) for 1-7 h at 150 degre…
Existence of water droplets on an outdoor high voltage insulator surface changes the electric field flux and its equipotential distribution. The water droplets may appear in different forms and sizes, therefore the form is defined by the angle shape between the surface of the water droplet and that of the insulator su…
The X-ray powder diffraction, dielectric and Raman studies of the (1 − x) PbMg1/3Nb2/3O3–xPbTiO3 (0 ≤ x ≤ 0.38) single crystals were performed in a wide temperature range. The results of these complementary studies revealed that with the increase in PT content, the relaxor behaviour transforms into the ferroelectric o…
Aerosol particles formed from the bursting of small gas bubbles emitted from the anode and cathode electrodes during electrolytic chrome plating were measured with a laboratory apparatus. The measured aerosol particle emission factors were about 5.15 mg particles/amp-hour or 3.81 mg Cr+ 6/amp hour. The cathode gases g…
Abstract Flexible optically rewritable reflective TN LC display based on photoalignment technology has been demonstrated. The rewritable display does not require any electronic scheme, power supply, or conductive layers, when operating. Such a display can erase and write images for many times because of LC alignment r…
A multilayer piezoelectric ceramic/polymer composite with 2–2 connectivity was fabricated by thermoplastic green machining after co‐extrusion. The multilayer ceramic body was composed of piezoelectrically active lead zirconate titanate (PZN)–lead zinc niobate (PZN)‐lead zirconate titanate (PZT) layers and electrically…
The high mobility of austenite-martensite interfaces is a characteristic of a thermoelastic martensitic transformation. Internal friction and elastic constants are very suitable probes to analyze this mobility. In this work, resonant ultrasound spectroscopy, differential scanning calorimetry, and neutron powder diffra…
Of all the potential sources of contamination in microelectronics manufacturing, water is the most significant – being necessary at different stages of the production process. John Hutcheson of Hutch 2 O looks at how this potential problem can be avoided.
Homogeneous cement-bonded particleboards 6 mm in thickness were made from maize stalk with Portland cement and calcium chloride. Boards were produced at two levels of cement/maize stalk ratio and three levels of additive concentration and board density, giving 18 treatment combinations. Modulus of rupture (MOR), modul…
Polycrystalline boratotungstates of composition Ln 3 BWO 9 (Ln = Pr, Nd, Sm, Gd, Tb, Dy) are prepared by solid-phase synthesis and structurally studied. The structures are refined using the Rietveld method for hexagonal space group P 6 3 ( Z = 2). The boratotungstate structures are frameworks. The rare-earth cations i…
Mechanochemistry is a branch of solid state chemistry which inquires into processes which proceed in solids due to the application of mechanical energy. At present, mechanochemistry appears to be a science with a sound theoretical foundation which exhibits a wide range of potential application. Amongst the potential v…
The dielectric susceptibility of strontium-barium niobate, Sr0.75Ba0.25Nb2O6, reveals strong relaxor behaviour. It is shown that the relationship between the frequency of the ac probing field and the temperature, at which the real part of the susceptibility passes through a maximum, satisfactorily follows the activate…
At the present transmission, an electron energy-loss spectrum (EELS) analysis is only carried out in transmission electron microscopes, such as the transmission electron microscopes (TEMs) or the Scanning Transmission Electron Microscopes (STEMs). Although the elemental analysis can be done in the scanning electron mi…
Crystals of a new hydrous rare-earth borate LaB 5 O 8 (OH) 2 · 1.5H 2 O( 1 ), space group P 2 1 / n , are prepared hydrothermally. The crystal structure is solved using the heavy-atom method without a priori knowledge of the chemical formula. The complex anionic radical is built of pleated layers, which are structural…
The dielectric behaviour of tetragonal PLZT x/40/60 ceramics doped with lanthanum (x = 5, 12 and 15%) has been investigated at 100–1014 Hz. Dielectric, THz and infrared spectra were measured from 500 to 20 K. For x ≥ 12 relaxor ferroelectric behaviour was observed. All three samples showed an additional relaxational m…
Abstract Since the formula for the shaped charge jet break‐up time was published on 1979 many attempts were made to interpret it and to make its use more efficient. It is shown herein that the V pl parameter depends on the ratio of the liner thickness to the charge explosive diameter by the formula: 1/ V pl =13.9−101⋅…
Insulating materials should be heat and fire resistant within the specified limits without damaging other properties. In the present work, different samples of polyvinyl chloride (PVC) and PVC/alumina trihydrate (ATH) composites have been prepared and exposed to various degrees of temperatures, which represent the var…