Materials Literature
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Abstract A new process for converting sulfur dioxide to elemental sulfur by a cyclic process involving calcium sulfide and calcium sulfate without generating secondary pollutants, developed at the University of Utah, was described in Part I of this series. In this process, sulfur dioxide is reacted with calcium sulfid…
The thermolysis of the complexes [Co(NH 3 ) 6 ] 2 C 2 O 4 [Cu(C 2 O 4 ) 2 ] 2 (I) and [Co(NH 3 ) 6 ]Cl[Cu(C 7 H 4 O 3 ) 2 ] (II) in air and hydrogen at 200, 350, and 500°C and the composition and properties of the thermolysis products are considered. The oxidative thermolysis of the complexes yields mixtures of cobalt…
The spontaneous ordering of fragments of chain molecules near the surface in polymer films is described in terms of the multichain model that allows for local intra-and interchain orientational interactions of chain segments and for transverse fluctuation of their orientation in the approximation of strong planar-orie…
The structure of semiconductor crystals Zn1−x V x 2+ Se (x = 0.0018) and Zn1−x Cr x 2+ Se (x = 0.0006) was studied for the first time using thermal neutron diffraction at 300 and 120 K. The diffraction patterns of the crystals were revealed to contain diffuse scattering regions near the Bragg reflections of the initia…
We characterized the structure of the crystallographic domain of a (Pr 0.7 Ca 0.3 )MnO 3 (PCMO ( x =0.3)) thin film epitaxially grown on a (001)SrTiO 3 (STO) single‐crystal substrate. We found that the domain structure exhibited an atomically smooth coherent interface with the STO substrate with no misfit dislocations…
Under a constant stress of 50 MPa, a thermal strain with a range of 0.2% was measured on a carbon‐fiber‐reinforced SiC‐matrix composite (C/SiC) subjected to thermal cycling between 700° and 1200°C. Acoustic emission (AE) technology was implemented to assist in monitoring the occurrence of damage during testing. The mo…
The effect of annealing on the physical properties of DC and RF sputtered ITO thin films has been investigated. Two series of samples were deposited onto glass substrates, the first one consists of several In2O3:Sn (ITO) prepared by DC reactive sputtering with different partial pressure of oxygen (ppo); in the second…
On the basis of octanol solubility data (log S(o)) for 218 structurally diverse solid chemicals it was shown that the exclusive consideration of melting points did not provide satisfactory results in the quantitative prediction of this parameter (s = 0.92). The application of HYBOT physicochemical descriptors separate…
A two-dimensional (2D) analysis of fiber spinning is presented based on a modified version of the two-phase model [Shrikhande et al., J. Appl. Polym. Sci. 100, 3240–3254 (2006); Kohler et al., J. Macromol. Sci. Phys. 44, 185–202 (2005)] that accounts for flow-enhanced crystallization (FEC). The modified model employs…
The use of thorium as a “fertile” material in combination with a fissile material (either U233, U235 or plutonium) as an alternative to the uranium fuel cycle received a great deal of attention in many venues from the 1950s to the mid 70s. More recently, new studies have been carried out on this cycle for transmutatio…
Nonevaporable getter (NEG) film has been used for the beam ducts of particle accelerators as a pump having a large area. NEG film has been considered to have a low outgas rate induced by energetic particle irradiation and a low secondary electron yield (SEY). In this article, we focused on SEY measurements and in situ…
A framework has been developed which links the reliability of insulation and plant to changes in their operating environment. These changes include non-power frequency events such as harmonics and the occurrence of impulses. This work is driven by the new demands put on real networks as a result of changing loads and…
Liquid natural rubber (LNR /LENR) should be considered as a new material instead of a new type of rubber though they have the same configuration as the rubber used. In this work, thermal degradation of natural rubber latex was carried out to obtain LNR/LENR by varying the reaction time at different temperatures. The d…
Gelatin gel microcapsules with a narrow size distribution have been prepared for the use of regenerative therapy by means of SPG (Shirasu porous glass) emulsification and UV-induced cross linking, and the melting and swelling behaviors of the gel membrane of the microcapsules were observed. The gel melting temperature…
A load current in dc high voltage cables results in a temperature drop across the insulation and hence a radial distribution of the insulation conductivity is found. Direct consequence is an accumulation of space charge in the bulk of the insulation, that may significantly affect its reliability. This phenomenon was m…
KEYWORDS: high-level radioactive wastegeological disposaloverpack corrosionNa-montmorillonitecation exchangeFe(II)-nitrilotriacetateFe(II)-montmorillonitepreparation of Fe(II)-montmorillonitestability of Fe(II)-montmorillonite
The ErCo 2 compound is prepared by arc-melting and its entropy changes are calculated using Maxwell relation. Its entropy change reaches 38 J/(kg·K) and its refrigerant capacity achieves 291 J/kg at 0–5 T. The mean field approximation is used to calculate the magnetic entropy of ErCo 2 compound. Results estimated by u…
Composition-graded films (CGF) of fluoroapatite (FAP) and poly(3-hydroxybutyrate- co-4-hydroxybutyrate) (PHB) were prepared via electrospinning solutions of FAP and PHB using a gradient composition of CGF. Thermal properties, mechanical properties and surface morphology of the films were investigated. Designed thermal…
Several methods of decontamination, such as melting, heating with flame, isotopic exchange with gaseous hydrogen, replacement with hydrogen, and thermal desorption under moist gas, were tested on stainless steel, INCONEL®, beryllium, copper, and aluminum bronze contaminated with tritium. The detritiation methods were…
For the DyMnO3 multiferroic with a modulated magnetic structure, switching of its spontaneous electric polarization (P ‖ c axis) near the ferroelectric transition (T < T FE ∼ 20 K) is revealed by measuring the dielectric hysteresis loops. It is found that the coercive field strongly increases as the temperature decrea…