Materials Literature
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In this chapter we introduce the basic electrical terminology and account for the wide variation of observed electrical conductivities and charge transport processes. Our treatment is introductory and necessarily simplified; the reader is referred to more advanced texts during the discussion.
Abstract
The isomer shift S and quadrupole splitting \ensuremath{\Delta} of the 35.5-keV $^{125}\mathrm{Te}$ level in M${\mathrm{Te}}_{2}$ (M=Ti, V, Cr, Fe, Co, and Ni) were measured at 80 K. M${\mathrm{Te}}_{2}$ with pyrite- and marcasite-type structures exhibit a linear relationship between S and \ensuremath{\Delta}, while t…
Azaferrocene reacts with chloro[5,10,15,20-tetrakis(pentafluorophenyl)porphyrinato]iron(III) to give a low-spin iron(II) porphyrin, [FeII(tfpp){Fe(C5H5)(C4H4N)}2], the crystal and molecular structure of which has been determined; while air-stable in the solid state, in solution it loses co-ordinated azaferrocene and (…
The diatom community that inhabits both the water-column and the benthos of tidepools positioned along an intertidal gradient, during late spring and early summer is described. Samples from the water-column and benthos of five tidepools, ranging from 1.5 to 6.5 m, were collected on five dates, and the diatom community…
The surface properties of a film made from a novel latex product, surface-hydrophilic elastomer latex (SHEL), were studied by the sessile-drop contact-angle technique. The advancing contact angle of water on a SHEL film was very low, indicating that the surface was hydrophilic. The surface hydrophilicity was sustained…
Oil-soluble copper salts such as copper naphthenate have been evaluated as additives to mineral oil, synthetic hydrocarbon, and polyol ester base stocks in the Penn State microoxidation test. These tests were carried out at 225°C under test conditions which show good agreement with the behavior of automotive crankcase…
This volume is devoted to solidification of polymers in general; crystalline, liquid crystalline, and amorphous polymers, including oriented polymers and the effects of pressure and processing are dis
Structural systematics, programmability, and guest transport are discussed for a large class of lattice clathrates based on tetraarylporphyrins.
In order to clarify the rate and mechanism of the formation of Sm–Fe intermetallic compounds by the reduction-diffusion (R-D) process, three kinds of experiments were carried out: (1) the reduction of pellets of Sm2O3 powder mixed with CaH2, (2) the R-D reaction for the pellets which were composed of Sm2O3, CaH2 and F…
ABSTRACT A method has been developed for analyzing the X‐ray diffraction patterns of amorphous solids, and the atomic arrangement in two simple glasses has been completely worked out. In SiO 2 , for example, each silicon is tetrahedrally surrounded by 4 oxygens at a distance 1.60 Å, and each oxygen is shared between t…
In order to clarify the dissolving aspects of refractory elements (Ta, Mo, V) which are components of beta titanium alloys, the experiments of VAR with a mold of 100 mm diameter were carried out. In the experiments, the initial diameters of those elements were changed and their particles were observed after melting. T…
The effect of δ ferrite morphology and grain boundary property on the low temperature toughness of austenitic stainless steel SUS304L weld metal has been studied. The types of δ ferrite were classified into three categories : vermicular, lacy, and globular. When Charpy test were performed at low temperature, brittle f…
The interaction of mer-IrCl3(SEt2)3 with Mg(mes)2(thf)2[mes = mesityl (2,4,6-trimethylphenyl), thf = tetrahydrofuran] in Et2O-thf gives trans-Ir(mes)2(SEt2)21. With PMe31 gives trans-Ir(mes)2(PMe3)22; both compounds are paramagnetic. With NO, 2 reacts to form the formally iridium(III) complex Ir(mes)2(NO)(PMe3)24 that…
The crystal structure of Cs 3 Sr[Ag 2 (SCN) 7 ] was determined from single crystal X-ray diffraction data (tetragonal, I [unk]2 m , a = 11.083(2) Å, c = 20.117(3) Å, Z = 4, D x = 2.98 Mgm −3 , μ (Mo K α ) = 8.55 mm −1 , T = 293 K, R = 0.040 for 1183 unique reflections). The main structural feature is the binuclear μ -…
Transition behaviour of impact absorbed energy is well known for 18%Mn-18%Cr-N steel. The cleavage-like transgranular facets are detected on fracture surface of impact specimens tested at low temperature. Impact absorbed energy decrease when these cleavage-like facets are found on fracture surface of test specimen.The…
Liquid or semisolid redox polymer electrolytes can be organized to show many characteristics of conventional solid‐state semiconductor diodes. Fermi levels of redox electrolyte solutions provide a rational comparison of redox electrolyte solution mixtures at equivalence, redox ions in fixed‐site polymers, correspondin…
The effect of chemical composition on the sintering mechanisms and microstructure of Fe-C-P alloys was studied by metallographic and thermal analysis and by secondary ion mass spectroscopy. Pore morphology was found to tend to spheroidisation with an increase in the phosphorus and, more particularly, in the carbon con…
Permanent magnets based on Fe–Nd–B show high magnetisation and high coercivity at room temperature but unfavourable properties at higher temperatures. This behaviour has to be improved. The hard magnetic properties are limited by nucleation of severed domains, therefore the surfaces and interfaces of the grains consti…
After a short introduction relating the evolution of ultraphosphate chemistry along time we report what is the present state of our knowledge of this chemistry, giving as completely as possible the main crystallographic features of all the today known ultraphosphates. Then we describe what are the atomic frameworks of…