Materials Literature
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Abstract Octadecylamine (ODA) was used to intercalate a fine-grained and a coarse-grained fraction of natural Mg-vermiculite (VER) using a low-temperature melting procedure. Mixtures of Mg-vermiculite fractions and powdered ODA in the molar ratios of 2:1, 1:1, 1:2 and 1:6 were homogenized and heated for 1, 3, 15 and 3…
The effects of Dy co-doping on the thermoluminescence (TL) characteristics of LiNaSO4:Eu phosphor are studied. Energy transfer from Eu2+ to Dy3+ results in a decrease in TL peak intensity suggesting that Dy3+ plays a negative role in TL emission in the present matrix. However, though Dy3+ acts as a quencher, it helps…
This paper addresses the off-design analysis of a hybrid system (HS) based on the coupling of an existing Ansaldo Fuel Cells (formerly Ansaldo Ricerche) molten carbonate fuel cell (MCFC) stack (100 kW) and a micro gas turbine. The MCFC stack model at fixed design conditions has previously been presented by the authors…
This short account demonstrates that ferrocene is a valuable unit for the elaboration of functional liquid-crystalline materials: 1) its three-dimensional structure allowed a clear structure-mesomorphic behavior relationship in the case of mono-, di-, and poly-substituted ferrocene-containing liquid crystals to be est…
Abstract The deformation of the dispersed phase in polystyrene/high density polyethylene (PS/HDPE) blends produced by ribbon extrusion was studied numerically and experimentally. A mathematical model for the deformation of the dispersed phase in ribbon extrusion processing of polymer blends was developed assuming unia…
Abstract A possible structural change in Sr 0.66 Ba 0.34 Nb 2 O 6 single‐crystal fibers when the temperature decreases from 295 to 10 K was investigated by dielectric constant measurements and Raman spectroscopy. An anomaly observed in the dielectric constant and the loss factor is associated with the variation in the…
Electromigration due to insufficient wire width can cause the premature failure of a circuit. The ongoing reduction of circuit feature sizes has aggravated the problem over the last couple of years, especially with analog circuits. It is therefore an important reliability issue to consider current densities already in…
We have determined the equation of state of phase Egg, AlSiO 3 OH, at room temperature up to 40 GPa, using X-ray powder diffraction with synchrotron radiation. We determined the isothermal bulk modulus K 0T = 157 ± 4 GPa with a pressure derivative K' 0T = 6.5 (4) by fitting a third order Birch- Murnaghan equation of s…
Kupcikite, Cu 3 . 4 Fe 0 . 6 Bi 5 S 1 0 , a new mineral species, is found in the scheelite deposit of Felbertal, Austria, in a quartz gangue, in association with chalcopyrite, pyrrhotite, molybdenite, sphalerite and native bismuth, intergrown with makovickyite, cupromakovickyite, hodrushite, cuprobismutite and derivat…
Ganterite, [Ba 0.5 (Na,K) 0.5 ]Al 2 (Si 2.5 Al 1.5 O 10 )(OH) 2 , the barium-dominant analogue of muscovite, was discovered in the crystalline basement rocks of the Berisal Complex, Simplon Region, Switzerland. Examples of this new rock-forming mica are found in bands and lenses of white-mica schist, and in a leucocra…
We have successfully developed a method of direct synthesis of carbon nanotubes on catalytic metal substrates, which uses the predeposition of Ti thin layers by thermal chemical vapor deposition. It was found that the amount of carbon nanotubes was dependent on the thickness of the Ti thin layers. We have fabricated a…
Abstract The liquid-phase dehydrogenation of (CH3)2CHOH, (CH3)2CHOD, and (CH3)2CDOH to yield acetone and molecular hydrogen was performed selectively under boiling and refluxing conditions by heating a suspended solution of a carbon-supported ruthenium and platinum composite catalyst. The Ru–Pt/carbon composite cataly…
Abstract Hyperbranched aliphatic polyesters of 2,2′‐bis‐(hydroxymethyl) propanoic acid and hyperbranched aliphatic polyamides obtained from new carboxy‐ and amino‐functionalized caprolactams were studied by NMR spectroscopy and MALDI‐TOF mass spectrometry. Ring‐chain equilibria taking place through intramolecular hydr…
Spatially resolved electron energy‐loss spectroscopy (EELS) analysis revealed a dynamic evolution of grain‐boundary (GB) films in a liquid phase (Al 2 O 3 –Y 2 O 3 –CaO) sintered β‐SiC, which had been deformed both in tension and in compression. An effective chemical width was measured from the oxygen segregation to G…
Seidite-(Ce), Na 4 (Ce,Sr) 2 {Ti(OH) 2 (Si 8 O 1 8 )}(O,OH,F) 4 5H 2 O, is a titanosilicate recently discovered in the Yubileynaya pegmatite at Mount Karnasurt, Lovozero alkaline massif, Kola Peninsula, Russia. Grains consist of disordered [010] fibers; no single crystals suitable for X-ray diffraction have found. On…
The paper discusses the results of steam explosion experiments of TROI-13, TROI-14, and TROI-15, which were performed under the research program named “Test for Real cOrium Interaction with water (TROI).” TROI-13 and TROI-14 used corium, which is a mixture of UO2 and ZrO2 at a 70:30wt%, while TROI-15 used ZrO2. These…
Abstract Diphenolic Acid, DPA [bis(4‐hydroxyphenyl)pentanoic acid] can be made from cellulose‐rich waste. The t‐butyl ester was converted to homo‐ and copolycar‐ bonates (with bis‐phenol‐A, BPA). Deblocking the ester yielded polycarbonates with pendent carboxyl groups that exhibit all the properties of polyelectrolyte…
High-density dispersion fuel experiment, RERTR-4, was removed from the Advanced Test Reactor (ATR) after reaching a peak U-235 burnup of {approx}80% and is presently undergoing postirradiation examination at the ANL Alpha-Gamma Hot Cell Facility. This test consists of 32 mini fuel plates of which 27 were fabricated wi…
A selection of cotton samples is tested with the Suter-Webb Array, AFIS (advanced fiber information system), and HVI (high volume instrument) methods. Short fiber contents as measured by these different methods show significant differences and high variations. The calibration level is one of the major factors causing…
This paper discusses how the composition and heat treatment affect the properties of the transparent ceramic Gd2O2S:Tb (Ce). The excitation spectra and the spectral composition of the emission and its temperature dependence have been studied, along with the thermally stimulated luminescence and the afterglow kinetics.…