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。
Metallographic study has been carried out on the Nd-Fe-Co-B alloys to clarify the change in coercivity with the Co composition substituted for Fe in the Nd2Fe14B type sintered magnets. The decrease in coercivity caused by the Co substitution is attributed to the formation of soft-magnetic phases such as Nd(Fe, Co)2and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, structure, and magnetic properties of Na10Fe4Cu2W18O70H6.cntdot.29H2O, containing the double Keggin anion [Fe4Cu2W18O70H6]10-Sadiq H. Wasfi, Arnold L. Rheingold, Gerald F. Kokoszka, and Alan S. GoldsteinCite this: Inorg. Chem. 1987, 26, 18, 2934–2939Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new structural form of tin in a cubic clusterK. C. Kumara Swamy, Roberta O. Day, and Robert R. HolmesCite this: J. Am. Chem. Soc. 1987, 109, 18, 5546–5548Publication Date (Print):September 1, 1987Publication History Published online1 May 2002Published inissue 1 September 1…
To improve the thermal stability of (Nd0.8Dy0.2) (Fe0.86Co0.06B0.08)5.5 sintered magnets for heavy duty applications, such as starter motors, effects of additional elements(M=Al, Nb and Ga) On the thermal stability were investigated in the (Nd0.8Dy0.2) (Fe0.86-u-Co0.06B0.08Mu)5.5 sintered magnets. The addition of Al i…
A technique for measuring the extremely small (<2 nm) probe sizes generated in a field emission gun analytical electron microscope is described. The technique involves scanning the fine probe across the edge of small oriented MgO cubes. A mathematical description of the intensity profiles is developed and it is sho…
(1) Transition from a flat two-dimensional community to an erect three-dimensional community has been described primarily for diatom colonization on rigid, artificial substrata. To determine if the same community transition occurs on natural, unstable substrata we examined colonization on sand grains over 33 days usin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinuclear mixed-valence manganese(II)-manganese(III) complexes: insight about the resolution of hyperfine structure in the EPR spectrumHabibe Diril, Hsiu Rong Chang, Xiaohua Zhang, Scott K. Larsen, Joseph A. Potenza, Cortlandt G. Pierpont, Harvey J. Schugar, Stephan S. Isied…
The title compound 1 can be regarded as a derivative of a “small supracluster”. This supracluster belongs to a series of vertex‐sharing icosahedra with a metal atom at the center of each icosahedron; the basic structural unit thus comprises 13 atoms. The simplest supracluster of 25 atoms (i.e. two units with a common…
If a crystal is illuminated by a polychromatic beam of X-rays, then many orders of each Bragg reflection may be stimulated simultaneously, and overlap exactly in scattering angle. The overlap of these multiple orders along a ray (a central line in reciprocal space) poses a problem for Laue methods. A theory of the dis…
The charging‐discharging behavior of battery was found to show a different dependence on the thickness of a polypyrrole film cathode prepared at various polymerization potentials. Lithium batteries constructed with a polypyrrole cathode formed at a higher potential show better charging‐discharging performance characte…
Poly(aniline), when immersed in acid electrolytes, is an electronic conductor between 0.2 and 0.8 V sce . Concurrent measurements of ESR absorption and injected charge during a potential scan across this region reveal a major increase in paramagnetism within the conducting regime, with sharp maxima near 0.2 and 0.8V.…
The energy imparted to biological tissue after the decay of incorporated Auger emitters stems from two sources: (a) energy deposition by the Auger and Coster-Kronig electrons and (b) the charge potential which remains on the multiple ionized atom after the end of the cascade. For the numerical assessment of both the k…
Small-angle neutron scattering experiments investigating the structure of porous Vycor glass are reported. The long-wave-length behavior ($0.004{\AA{}}^{\ensuremath{-}1}\ensuremath{\le}q\ensuremath{\le}0.025{\AA{}}^{\ensuremath{-}1}$) of the measured structure factor $S(q)$ is in good agreement with Cahn's prediction…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagic angle spinning NMR studies of silicon carbide: polytypes, impurities, and highly inefficient spin-lattice relaxationJ. Stephen Hartman, Mary F. Richardson, Barbara L. Sherriff, and Beatrice G. WinsborrowCite this: J. Am. Chem. Soc. 1987, 109, 20, 6059–6067Publication D…
Abstract Low-temperature structural study of [(CH3)4N][Ni(dmit)2]2 suggested that the rotational freedom of methyl group seems to play an important role in the “metal-semimetal” transition. Superconducting transition was observed at 5 K (7 kbar).
In order to investigate the influence of oxygen on the chemical vapor deposition (CVD) of diamond, gas mixtures of H 2 –CH 4 and H 2 –CH 4 –O 2 were used to carry out thermal CVD. The effects of the oxygen additive were examined by gas chromatography for the exhaust gas and by a characterization of the deposits. With…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA possibility of crystal size distribution control using additives in batch-cooling crystallizationNoriaki Kubota and Hiroshi TakahashiCite this: Ind. Eng. Chem. Res. 1987, 26, 9, 1936–1939Publication Date (Print):September 1, 1987Publication History Published online1 May 20…
The newly discovered phenomenon of stress-dependent saturation magnetostriction, observed in low-magnetostrictive metallic glasses, is discussed. Its influence on the measurements of saturation magnetostriction is seen when the experiments are carried out by means of indirect methods based on the Villari effect. A pro…
Abstract Die Änderung der Molmassenverteilung linearer Poly(dimethylsiloxane) nach Kontakt mit Diethylamin und Diethylamin‐Kaliumhydroxid‐Gemischen wurde mit der GPC verfolgt. Der Abbau führt zu Polysiloxanen des Polymerisationsgrades 8 bis 20.
Abstract An analysis of the 1 H and 13 C NMR spectra of the chlorobutyl and bromobutyl rubbers was performed. Peaks were assigned based on evidence from broad-band decoupled, off-resonance decoupled, selectively decoupled and J-modulated spectra, the known characterization of butyl rubber and halogenation studies on m…