Materials Literature
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Significant modifications of the shape of magnetic flux in columns and yokes were observed in the magnetic circuit of four amorphous cores used in a 3-phase transformer. The magnetic losses measured experimentally were significantly higher than the ones calculated theoretically. The values quoted in this paper were ob…
The Hall coefficient, thermoelectric power, and electrical conductivity in PbTe doped with La, Pr, Sm, and Gd are investigated in the temperature range (77–700) K. The impurity atoms act as donors with an electrical activity that increases with temperature until the fraction of electrically active lanthanide atoms (Ln…
Computer simulations of bubble oscillations induced by an ultrasonic wave in liquid nitrogen are performed, including the effect of evaporation and condensation of nitrogen vapor at the bubble wall, that of droplets formation inside the bubble, and that of thermal conduction both inside and outside the bubble. Baghdas…
New enaminoketone metalomesogens with an almost equilateral triangular shape of the mesogenic core have been synthesized. They form either calamitic or columnar mesophases depending on the number and position of the substituted chains. The stability of the columnar as well as of the calamitic phases depends substantia…
The synthesis of a novel kind of form-retaining liquid crystalline crosslinked metallopolymer is reported. Copper(II) is complexed by Schiff's base units as part of a mesogenic side chain polymer. This leads to remarkable antiferromagnetic exchange interactions between the copper centers that are not present in relate…
Thin radio-absorbing screens with an attenuation of 30 dB at frequencies of 8–10 GHz were fabricated using a composite with microconductor sections.
A measuring system for magnetostriction of silicon steel sheet using optical methods and a single sheet tester has been developed to establish a standard test method for IEC and JIS. Various factors affecting measurement accuracy and reproducibility of the developed system are examined. Two optical instruments, such a…
Ti2O3 is a semiconducting transition-metal oxide with a 0.1 eV bandgap at room temperature and is thus fairly conducting. The conducting nature of the oxide produces a double-peaked structure of the Ti 2p1/2 and 2p3/2 XPS core-level peaks. The sample, which exposes a (101¯2) cleavage face, contains only Ti3+ cations,…
The 1,2,5,6-tetrathiocins (C 6 X 4 S 2 ) 2 (3a, X = F; 3b, X = Cl) are obtained in high yields by the oxidation of the dithiols 1,2-C 6 X 4 (SH) 2 (X = F, Cl) with I 2 or SO 2 Cl 2 , respectively. In the solid state 3a has the C 2h (chair) conformation and crystallizes in two different phases: alpha-(C 6 F 4 S 2 ) 2 ,…
Fiber push‐out curves generated on high‐strength, treated‐fiber Nicalon/C/SiC composites indicate behavior that is distinctly different from other composites. These composites have been analyzed using a model that explicitly includes two sets of debond‐crack‐surface topographies that correspond to two stages of crack…
Compounds of a silicone elastomer suitable for preparing maxillofacial prostheses, reinforced with various amounts of silica powder, have been studied for their mechanical response and wetting properties in terms of contact angle. Tensile strength and elongation at break showed an increase with increasing silica volum…
The effect of internal stress on the physical properties (the temperature dependence of the dielectric constant and the lattice constant, and the diffuseness (gamma)) of solid solutions of 0.97BaTiO 3 ‐0.03Gd 2 O 3 :1.5TiO 2 and 0.97BaTiO 3 ‐0.03CeO 2 :1.5TiO 2 was investigated using various particle sizes of the star…
Transparent films were electrochemically deposited onto layers which had been formed on conductive glass. This optically transparent composite electrode exhibited strong, reversible photochromic and electrochromic properties when either illuminated by a 75 W Xe lamp at open circuit or anodically polarized in 1.0 M aqu…
In this study, we investigated the effects of dopants on the antiferroelectric-to-ferroelectric (AFE-FE) phase transition behavior of lead lanthanum stannate zirconate titanate (PLSnZT) family of ceramics. In particular, the possibility to lower both the switching field and hysteresis by compositional modification was…
An experimental investigation was conducted to research the foamability of different thermoplastic elastomers (TPE) using CO 2 as blowing agent and Hydrocerol as nucleating agent. For each material, different foaming temperatures, as well as blowing and nucleating agent percentages, were examined. A specific TPU-type…
The novel steroid-bridged energy transfer system 2 was prepared starting from epi -androsterone. The linkage of both the anthrylthienyl and the bithienyl group in the 3- and 17-position of the steroid was achieved by Grignard reaction of the respective carbonyl function of the steroid component. The synthesis was acco…
Both fundamental and practical aspects of ceramic joining are understood well enough for many, if not most, applications requiring moderate strengths at room temperature. This paper argues that the two greatest needs in ceramic joining are for techniques to join buried interfaces by selective heating, and methods for…
Broadband antireflection coatings on ZnSe substrates are designed and manufactured in the 3.5-16-mum IR range. The thin-film materials are YF(3) and ZnS produced by electron-beam deposition. To reach optimal performances to as great as 16 mum, we performed an accurate determination of complex indices, taking into acco…
A study of photoinduced ${\mathrm{Ta}}^{4+}$ centers in nominally pure ${\mathrm{KTaO}}_{3}$ single crystals has been carried out by electron-spin resonance. Two of these centers $({\mathrm{Ta}}^{4+}\ensuremath{-}{V}_{\mathrm{O}}$ and ${\mathrm{Ta}}^{4+}\ensuremath{-}{V}_{\mathrm{O}}\ensuremath{-}{\mathrm{Me}}^{4+})$…
Abstract Recent developments in polymer builders and specialty polymers (i.e., soil shield and soil release agents, dye transfer inhibitors) for detergents are reviewed. Attention focuses on polycarboxylates as detergent processing auxiliaries as well as detergent actives under low‐temperature washing conditions.