Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The intrinsic magnetic properties of VSe2 in the incommensurate and commensurate charge denity wave states have been examined by magnetic susceptibility and NMR observations. VSe2 synthesized at high temperatures is slightly metal-rich and since the excess vanadium atoms are magnetic, their contribution to the magneti…
Abstract XRD, DTA and IR patterns showed clay veins filling fissures in a granite of the Bayerischer Wald (eastern Bavaria) to consist mainly of hydrated halloysite of low crystallinity with traces of gibbsite, 2:1 (mixed layer) clay minerals and iron oxides. The halloysite forms thin plates which exhibit varying degr…
Sulfur concrete may be attained with a compressive strength of approximately 1200 kp/cm 2 by using 3 wt % DCP-modified sulfur as binder and defined grain size distributions for aggregates. Microscopic examinations of thin polishes show the importance of optimally composed aggregates to the strength of sulfur concretes…
Eu1/2Ba1/2TiO3 was prepared with the intent of building both ferromagnetism and ferroelectricity into the same crystal lattice. Ceramic samples prepared at 1500 °C exhibit a magnetization of 59 emu/g at 1.8 °K and 5 kOe applied field. Possible crystallographic ordering of Ba2+ and Eu2+ ions is thought to permit positi…
The results of six crystal structure refinements of K2[Pt(CN)4]X0. 3. 3H20 with X = Br, C1 (KCP) from X-ray and neutron diffraction measurements between 31 K and room temperature are presented and compared. Particular subjects of the discussion are the parameters of the [Pt(CN) 4] groups, the distribution of the water…
Liquid sulfur—dicyclopentadiene (DCP) solutions at 140°C undergo bulk copolymerization where the melt viscosity and surface tension of the solutions increase with time. A general melt viscosity equation: η = η 0 exp(aX b t), at constant temperature, has been developed, where η is the viscosity at time t for an S 8 -DC…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMoessbauer-Zeeman spectra of some octaethylporphyrinato- and tetraphenylporphinatoiron(III) complexesDavid H. Dolphin, John R. Sams, Tsang Bik Tsin, and Kit L. WongCite this: J. Am. Chem. Soc. 1978, 100, 6, 1711–1718Publication Date (Print):March 1, 1978Publication History P…
The development of domain theory and micromagnetics from the early 1930’s to the present is reviewed and assessed, with emphasis on the developments of particular interest to the author.
The diffuse scattered X-ray intensity close to several reciprocal lattice points (hh0) was measured at room temperature in single-crystal Ta-H alloys. The displacement field of dissolved hydrogen in Ta can be treated as a linear superposition of single-defect fields even at concentrations as high as c(H/Ta)=0.111. In…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilver iodide based solid electrolytesSeymour GellerCite this: Acc. Chem. Res. 1978, 11, 3, 87–94Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.org/doi/10.1021/ar50123a002https://doi.org/10.1…
A numerical model was developed to compute the temporal and spatial variations of the detailed micromagnetic structures of domain walls by numerical integration of the Landau-Lifshitz-Gilbert equation. Fundamental interactions due to anisotropy, exchange, and demagnetization are included. Preliminary results for the s…
Zusammenfassung Dioktaedrische Smektite aus 19 Bentonitproben werden abgetrennt. Aus den chemischen Analysen errechnen sich unter Berücksichtigung der direkt gemessenen Zwischenschichtladungen (nach Lagaly & Weiss, 1971) kristallchemische Strukturformeln von exakt dioktaedrischen Mineralen. Die Tetraederzentren in…
Abstract The addition of particulate mineral fillers to polymers confers certain mechanical property improvements automatically. Stiffness increases, creep diminishes and distortion at elevated temperatures is often reduced. However, the fracture energy of a polymer, as measured in impact, cracking or tearing tests, m…
Factors governing stress corrosion cracking (SCC) of low strength, low alloy nickel steels (e.g., ASTM A203 Grade E) in sulfide environments were investigated using a three point loaded bent beam specimen. Cracking occurred in both weld and base metal at low H2S partial pressures (to 0.001 atmosphere) and stress level…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEmpirical or Scientific Approach to Evaluate the Corrosion Protective Performance of Organic CoatingsW. Funke and H. HaagenCite this: Ind. Eng. Chem. Prod. Res. Dev. 1978, 17, 1, 50–53Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Publish…
Hexagonal ferrites are of interest for microwave and millimeter-wave devices. We have grown single crystal layers of hexagonal ferrites on non-magnetic spinel substrates using the isothermal dipping method of liquid phase epitaxy. Ferrimagnetic resonance spectra of M-type layers at 35 GHz exhibited half power linewidt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCyclophosphazene clathrates - exploring the adjustable tunnelHarry R. AllcockCite this: Acc. Chem. Res. 1978, 11, 3, 81–87Publication Date (Print):March 1, 1978Publication History Published online1 May 2002Published inissue 1 March 1978https://pubs.acs.org/doi/10.1021/ar5012…
We have investigated the chemisorption of O2 on TiO2 and SrTiO3 surfaces by using ultraviolet photoemission difference spectroscopy. Both nearly perfect surfaces and surfaces having a high density of defects associated with filled Ti(3d) surface states were studied. On all surfaces low O2 exposures produced an initial…
Abstract The mechanics of ion incorporation into a crystal are examined in order to evaluate mechanisms of calcite growth inhibition and morphology control. Crystallographic considerations indicate that while the Folk (1974) mechanisms of Mg (super +2) interaction with calcite may be responsible for inhibiting crystal…
SUMMARY A study of the vertical and lateral variations in particle size distribution, mineralogy and other petrographic features of tills in East Yorkshire, Lincolnshire and north Norfolk shows that the Devensian glacial succession in eastern England contains only two tills, for which the new names Skipsea and Withern…