Miniaturized Thermoelectric Converters
Kapitel 46, 18 S.
Materials Literature
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Generalized Green-Kubo formulas for fluids with impulsive, dissipative, stochastic, and conservative interactions
We present a generalization of the Green-Kubo expressions for thermal transport coefficients $\ensuremath{\mu}$ in complex fluids of the generic form $\ensuremath{\mu}={\ensuremath{\mu}}_{\ensuremath{\infty}}+{\ensuremath{\int}}_{0}^{\ensuremath{\infty}}dt{V}^{\ensuremath{-}1}{⟨{J}_{ϵ}\phantom{\rule{0.2em}{0ex}}\mathr…
A phenomenological model for the rare-earth contribution to the magnetic anisotropy in RFe11Ti and RFe11TiH
A phenomenological model based on the interactions between the crystal field and the 3d–4f exchange interactions has been developed to explain the zero-kelvin magnetic anisotropy of the RFe 11 Ti compounds and their hydrides, RFe 11 TiH, where R is a rare-earth element. In most cases, this model also predicts the exis…
A New Crystal Form Favored in Low Molecular Weight Biodegradable Poly(3-hydroxypropionate)
The crystalline structure of biodegradable poly(3-hydroxypropionate) (PHP) has been found to quite depend on the molecular weight (MW) and crystallization conditions. In particular, a new crystal form (the δ-form) has been successfully prepared by casting and optimal melt-crystallizing the low-MW PHP. The overwhelming…
Polyadipates used as plasticizers in food contact: Fraction below 1000 Da determined by size exclusion chromatography with evaporative light scattering detection and segmental response linearization or UV detection
Polyadipates might be a suitable replacement for conventional plasticizers in plastisols to produce lids for glass jars complying with legal limits for oily foods. For the characterization of polyadipates, the proportion of the material with a molecular mass below 1000 Da is important. Determination of the material <…
Ex SituTransmission Electron Microscopy: A Fixed-Bed Reactor Approach
A fixed-bed reactor has been designed and constructed for ex situ transmission electron microscopy (TEM) studies of heterogeneous catalysts. The ex situ facility exposes a fully prepared TEM sample on a grid to actual process conditions (e.g., temperature, pressure, gas composition, etc.) by placing the grid at the ex…
C13NMR study of orientational ordering in the chiral-Cphase of partially deuterated smectic liquid crystals
Carbon-13 NMR spectroscopy is used to probe the orientational ordering in the tilted chiral smectic phase of two partially deuterated liquid crystals. Quantitative analyses of the chemical shifts of the aromatic carbons in the smectic- and - phases enable us to obtain the location of the long molecular axis of the cor…
Drei Alkalimetall‐Erbium‐Thiophosphate: Von der Schichtstruktur bei KEr[P2S7] zur dreidimensionalen Vernetzung in NaEr[P2S6] und Cs3Er5[PS4]6
Abstract Three Alkali‐Metal Erbium Thiophosphates: From the Layered Structure of KEr[P 2 S 7 ] to the Three‐Dimensional Cross‐Linkage in NaEr[P 2 S 6 ] and Cs 3 Er 5 [PS 4 ] 6 The three alkali‐metal erbium thiophosphates NaEr[P 2 S 6 ], KEr[P 2 S 7 ], and Cs 3 Er 5 [PS 4 ] show a small selection of the broad variety o…
Two New Polyoxovanadate‐supported Transition Metal Complexes: [Zn(en)2][Zn(en)2(H2O)2][{Zn(en)(enMe)}As6V15O42(H2O)]·4H2O and [Zn2(enMe)2(en)3][{Zn(enMe)2}As6V15O42(H2O)]·4H2O
Abstract Two novel As‐V‐O cluster supported transition metal complexes, [Zn(en) 2 ][Zn(en) 2 (H 2 O) 2 ][{Zn(en)(enMe)}As 6 V 15 O 42 (H 2 O)]·4H 2 O ( 1 ) and [Zn 2 (enMe) 2 (en) 3 ][{Zn(enMe) 2 }As 6 V 15 O 42 (H 2 O)]·4H 2 O ( 2 ), have been hydrothermally synthesized. The single X‐ray diffraction studies reveal th…
Accurate Structure Determination of Mo6SyIz Nanowires from Atomic Pair Distribution Function (PDF) Analysis
The structure of the recently discovered systematically reproducible Mo 6 S y I z nanowires has been determined from the atomic pair distribution function (PDF) analysis of powder X-ray diffraction data. This total scattering approach was required because the nanowires are not perfectly crystalline and, therefore, the…
Electromagnetic wave propagation in anisotropic metamaterials created by a set of periodic inductor-capacitor circuit networks
We propose a complete set of periodic circuit networks which can realize electromagnetic wave propagation in different two-dimensional (2D) isotropic and anisotropic metamaterials (AMMs). We synthesize the periodic circuits with unit cells of series capacitor or inductor in orthogonal directions, together with either…
Structural Characterization of a Sol−Gel-Prepared Anhydrous Proton-Conducting Electrolyte
We have prepared a hybrid inorganic/organic, anhydrous proton-conducting polymer electrolyte (MePEG 3 SiO 3 ) n . Structural characterization of this MePEG 3 polymer through 29 Si NMR spectroscopy and gel-permeation chromatography indicates that our MePEG 3 polymer is composed of several different structures giving a…
Sm2As4O9: Ein ungewöhnliches Samarium(III)‐Oxoarsenat(III) gemäß Sm4[As2O5]2[As4O8]
Abstract Sm 2 As 4 O 9 : An Unusual Samarium(III) Oxoarsenate(III) According to Sm 4 [As 2 O 5 ] 2 [As 4 O 8 ] Pale yellow single crystals of the new samarium(III) oxoarsenate(III) with the composition Sm 4 As 8 O 18 were obtained by a typical solid‐state reaction between Sm 2 O 3 and As 2 O 3 using CsCl and SmCl 3 as…
Elucidation of coordination structure aroundCe3+in dopedSiO2glasses using pulsed electron paramagnetic resonance: Effect of phosphorus, boron, and phosphorus-boron codoping
Effects of codoping of phosphorus and/or boron on the coordination sphere of a ${\mathrm{Ce}}^{3+}$ in ${\mathrm{SiO}}_{2}$ glasses were examined by applying pulsed electron paramagnetic resonance (EPR) electron spin echo envelope modulation (ESEEM) spectroscopy. Simulation of the observed ESEEM pattern revealed a str…
Application of the statistical moment method to thermodynamic quantities of silicon
The lattice constants, thermal expansion coefficients, specific heats at constant volume and those at constant pressure, C v and C p , second cumulants, and Lindemann ratio are derived analytically for diamond cubic semiconductors, using the statistical moment method. The calculated thermodynamic quantities of the Si…
Styrene–butadiene–styrene/montmorillonite nanocomposites synthesized by anionic polymerization
Abstract We successfully synthesized an exfoliated styrene–butadiene–styrene triblock copolymer (SBS)/montmorillonite nanocomposite by anionic polymerization. Gel permeation chromatography showed that the introduction of organophilic montmorillonite (OMMT) resulted in a small high‐molecular‐weight fraction of SBS in t…
Mutual Sensitization of the Oxidation of Nitric Oxide and a Natural Gas Blend in a JSR at Elevated Pressure: Experimental and Detailed Kinetic Modeling Study
The mutual sensitization of the oxidation of NO and a natural gas blend (methane-ethane 10:1) was studied experimentally in a fused silica jet-stirred reactor operating at 10 atm, over the temperature range 800-1160 K, from fuel-lean to fuel-rich conditions. Sonic quartz probe sampling followed by on-line FTIR analyse…
Trimethylamine as a Gas‐Phase Promoter: Highly Efficient Epoxidation of Propylene over Supported Gold Catalysts
Wahrscheinliche Reaktionswege für die Epoxidierung von Propylen mit O2 und H2 in Gegenwart von Trimethylamin auf einem trimethylsilylierten Au-Ba(NO3)2/Titanosilicat-Katalysator werden vorgestellt (siehe Bild). Der Einsatz von Trimethylamin als Gasphasenpromotor und von Goldnanopartikeln ergibt eine einstufige Propyle…
Moisture absorption of filled silicone rubber under electrolyte
Abstract Moisture absorptions of filled silicone rubber (SiR) under strong electrolyte have been investigated in the temperature range of 25–60°C by weight‐gain experiments. Tests were performed with the materials exposed to NaCl, HNO 3 solution, and deionized water. The diffusion results have been analyzed in terms o…
SiC–CNT nanocomposites: high pressure reaction synthesis and characterization
Silicon carbide–carbon nanotube composite was fabricated using the high pressure reactive sintering technique. Samples were synthesized at high pressures, 2 and 8 GPa, and temperatures, 1770 and 1970 K. Their structures were studied using x-ray diffraction, x-ray photoelectron spectroscopy, transmission electron micro…