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 purpose of this study was to compare the experimental dissolution rates of carbonated apatite (CAP) pellets in acidic acetate buffers under a variety of conditions with theoretical predictions. The theoretical predictions were made in the following way. Recently obtained data on metastable equilibrium solubility (…
Abstract The new ferric sulphate mineral, mikasaite, the Fe analogue of millosevichite was found in Ikushunbe tsu, Mikasa city, Hokkaido, Japan. Mikasaite occurs as a sublimate around fractures from which coal gas escapes. The white-light brown coloured mineral shows aggregates of fine porous crystals. The SEM microgr…
Large synthetic diamonds grown by the reconstitution method, all exhibiting the growth forms {100}, {111}, {110} and {113}, were studied. Crystal perfection was assessed by X-ray topography using a conventional source of Cu Kα1 radiation and employing the section, projection and limited-projection topographic techniqu…
Microstructure and crystallinity of a porous silicon (PS) layer formed on a highly doped n-type silicon substrate were examined in detail, and the luminescent nature of the PS layer was also studied qualitatively. A layered pore structure developed after about 3000 s of anodization, and pore morphology became simpler…
Abstract A statistical mechanical theory is presented for liquid‐crystalline polymer solutions, where the liquid‐crystalline polymer is regarded as a wormlike spherocylinder interacting by the hard‐core repulsion and a soft (attractive or electrostatic) interaction with other spherocylinders. The theory is based on th…
The effects of β‐SiC whisker addition on the microstructural evolution and fracture toughness ( K IC ) of hot‐pressed SiC were investigated. Most of the whiskers added disappeared during the densifcation process by transformation into the α‐phase. The remaining whiskers acted as nuclei for grain growth, resulting in t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSEM-EDS Investigations of Self-Phosphating CoatingsLi Li and Chhiu-Tsu LinCite this: Ind. Eng. Chem. Res. 1994, 33, 12, 3241–3246Publication Date (Print):December 1, 1994Publication History Published online1 May 2002Published inissue 1 December 1994https://pubs.acs.org/doi/1…
Organic-inorganic composites (OICs) were prepared via the in-situ polymerization of an organically (phenyl) substituted trialkoxysilane, phenyltriethoxysilane (PhTEOS), in the presence of poly(vinyl acetate) (PVAc). The mechanical reinforcement above T g previously observed in OICs of unfunctionalized organic polymers…
Six different X-ray diffraction (XRD) methods for determining the relative amounts ofM 1 and 1M white K-mica polytypes were compared. Unoriented samples of different concentrations of the two polytypes were prepared using the technique described by Handschin & Stern (1989) and Stern (1991). An evaluation of different…
The purpose of this investigation was to try to develop a theoretical model to satisfy and explain the interaction between the needle and bobbin threads, the tensions developed and their influence on seam balance. An explanation of the conditions determining seam balance is proposed based on a “robbing back” theory of…
The influence of rare earth elements, such as cerium, lanthanum, and neodymium, on the microstructure and properties of high chromium white cast iron are examined. It has been demonstrated that rare earth elements can change the microstructural characteristics of white iron containing 18 wt-%Cr and that these elements…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Heterogeneous Secondary Pyrolysis Reactions on the Thermal Decomposition of Polyurethane ScrapDawn Y. Takamoto and Mark A. PetrichCite this: Ind. Eng. Chem. Res. 1994, 33, 12, 3004–3009Publication Date (Print):December 1, 1994Publication History Published online1 M…
The effect of heating rate (2 to 30°C/min) during sintering on the perovskite phase content, density, microstructure, and dielectric properties of 0.9PbMg 1/3 Nb 2/3 O 3 –0.1PbTiO 3 relaxor ferroelectric ceramics has been studied. Increasing the heating rate reduced the level of PbO evaporation and resulted in high pe…
The interaction of slip dislocations with the (012) twin interface in zinc has been investigated using transmission electron microscopy. Several processes have been pointed out: slip transfer across the grain boundary, dissociation into secondary dislocations and reaction with interfacial dislocations. Moreover, the s…
Using a crossed-beam method, we have measured electron-energy-loss spectra for the excitation of the Schumann-Runge continuum of molecular oxygen. The scattering angle and electron-impact energy ranges covered were 12\ifmmode^\circ\else\textdegree\fi{}--156\ifmmode^\circ\else\textdegree\fi{} and 15--50 eV, respectivel…
Abstract NiCr2O4, ZnCr2O4, CuCr2O4, CuAl2O4, and CuFe2O4 were prepared and characterized by XRD, DRS, and IR and by measurements of surface area, acidity, and electrical conductivity. XRD analysis indicates, that chromites, aluminate, and ferrite have normal, partially inversed, and inversed spinel structure, respecti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVerdoheme-like Oxaporphyrin Formation by Oxygenation of a Co(II) Porphyrinyl Naphthoic Acid. A New Model of Heme DegradationC. K. Chang, Gladys Aviles, and Nilkamal BagCite this: J. Am. Chem. Soc. 1994, 116, 26, 12127–12128Publication Date (Print):December 1, 1994Publication…
Abstract A one‐pot synthesis of polytitanosiloxanes (PTS) and its transformation to SiO 2 –TiO 2 ceramic fibers were investigated. PTS was prepared by the hydrolysis of tetraethoxysilane followed by the reaction with bis(2,4‐pentanedionato)titanium diisopropoxide in methanol in 33–95 SiO 2 mol %. PTS was considered to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Orientation and Surface Morphology in Methyl Iodide Films Grown on MgO(100) Probed by PhotodissociationD. Howard Fairbrother, K. A. Briggman, P. C. Stair, and Eric WeitzCite this: J. Phys. Chem. 1994, 98, 49, 13042–13049Publication Date (Print):December 1, 1994Publ…
Abstract The electrical conductivity of solution‐grown ethyl cellulose (EC) films, 5–30 μm thick, has been studied in the sandwich configuration (metal–EC–metal) as a function of iodine concentration from 0.5 to 5.0 wt% ratio. The studies were conducted in the temperature range 333–383 K, while the field was varied ov…