Materials Literature
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The resistivities of epitaxially grown silver films have been measured as a function of temperature from 4.2 to 295\ifmmode^\circ\else\textdegree\fi{}K. Both the temperature-independent residual resistivity and the temperature-dependent resistivity were found to increase with a decrease in the specimen thickness. The…
Plastic deformation bands nearly parallel to planes of maximum shear stress have been observed in unoriented glassy polystryene in compression and in preoriented polystyrene in tension and torsion. In the temperature range 77°–375°K, the shear stress for homogeneous nucleation of deformation bands is of the order of a…
Samples of ${\mathrm{La}}_{0.5}$${\mathrm{Sr}}_{0.5}$Co${\mathrm{O}}_{3}$ were prepared, and a study was made of their electrical and magnetic properties. Investigation of the initial susceptibility immediately above the Curie point ${T}_{c}$ determined that the critical exponent $\ensuremath{\gamma}=1.27\ifmmode\pm\e…
The optical-absorption characteristics of the perovskite oxides BaTi${\mathrm{O}}_{3}$, KTa${\mathrm{O}}_{3}$, and K${\mathrm{Ta}}_{0.65}$${\mathrm{Nb}}_{0.35}$${\mathrm{O}}_{3}$ (KTN) are reported in the vicinity of the interband absorption edge, and, in the case of semiconducting KTN, in the near infrared where dono…
The theory of the effect of a dynamic Jahn-Teller effect on the electron-paramagnetic-resonance spectrum of a $^{2}E$ state is developed from the limit of weak Jahn-Teller coupling taking account only of linear coupling. The principal changes produced in the EPR spectrum of the vibronic ground state may be represented…
I'EBRUARY 1/68 second type consists of mobile damage centers which congregate along existing imperfections.The first type can be either microscopically reversible or irreversible.As there is no ev- idence from our measurements that the dam- age in KDP extends beyond the unit-cell level it is classified as microscopica…
Improved lithium-drifted silicon solid-state detectors allow detection and energy dispersion of x-rays of about 3 to 30 kiloelectron volts in the electron-microprobe x-ray analyzer. Energy resolution is sufficient to separate peaks of characteristic x-rays of elements adjacent in the periodic system at atomic number 2…
Ferromagnetism, antiferromagnetism, or superconductivity has been discovered in most hexa- and dodecaborides.
Dispersions of (UTh)O 2 in beryllia containing 1.7 to 25 vole%, (UTh)0 2 in coarse (150 to 200P), medium (33 to 35P), and fine (<10 and <5μ) fuel particle sizes were irradiated to burnups of 3 to 10% of heavy metal atoms between 300’and 900°C, in both fast and thermal fluxes. Changes in volume, lattice parameter…
Tenacity of jute and mesta yarns has been related to bundle tenacity and fineness, measured on simple instruments, and regression equations have been obtained. The multiple correlation coefficient is of the order of 0.8.
The stress-rupture properties of two heats of Hastelloy N tubing have been determined at 760°C in the irradiated and unirradiated conditions. Irradiation reduced the rupture life and the rupture strain but produced no detectable effects on the creep rate. The effects of irradiation are rationalized on the basis of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnthalpy of formation of bismuth(III) iodide and the dissociation energy of bismuth(I) iodideDaniel CubicciottiCite this: Inorg. Chem. 1968, 7, 2, 211–213Publication Date (Print):February 1, 1968Publication History Published online1 May 2002Published inissue 1 February 1968h…
Abstract Es wurden die Phasen Mg 3 TeO 6 , Mg 2 InSbO 6 und Cd 2 InSbO 6 aufgefunden. Die röntgenographische Untersuchung zeigt, daß hier ein neuer Strukturtyp vorliegt. Die Lichtabsorption des Ni 2+ und Co 2+ nach isomorphem Einbau in Mg 3 TeO 6 und Mg 2 InSbO 6 wurde untersucht und ergab, daß Mg 2+ ausschließlich di…
High-resolution optical absorption spectra have been obtained on antiferromagnetic DyAlO3 and weakly ferromagnetic HoFeO3 and DyFeO3 at low temperatures. In DyAlO3 the absorption lines show a triplet structure which vanishes in Y(Dy)AlO3. From this it is concluded that the magnetic interactions take place for each Dy…
Inhibitors are available which effectively reduce the loss of metal because of corrosion occurring in the hydrochloric acid pickling baths. Selection of these inhibitors, however, must take into consideration the effect the inhibitor will have on scale dissolution. The optimum concentration of inhibitor must consider…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExtracellular thiaminase I of Bacillus thiaminolyticus. I. Purification and physicochemical propertiesJames L. Wittliff and Robert L. AirthCite this: Biochemistry 1968, 7, 2, 736–744Publication Date (Print):February 1, 1968Publication History Published online1 May 2002Publis…
Organic materials used as high-voltage electrical insulation are altered chemically and physically by corona discharges. The basic behavior of polyolefin and fluorocarbon resins were investigated under conditions of high electrical stress. The presence of corona subjects a material to ozone, acid, ultraviolet light, a…
Synthetic and very pure single crystals of nickel iodine boracite (Ni3B7O13I, NIB), up to 10 mm in their largest dimension grown by a chemical transport process were investigated, using a self-compensating recording balance under quasistatic conditions. Below 64°K ferromagnetic behavior in agreement with the results o…
The realistic boundary condition of the surface temperature varying with time is used in the heat transfer analysis of the solidification of a binary eutectic alloy system. The system occupies a semi-infinite region and consists of a solid zone, a freezing zone, and a liquid zone. The heat released in the freezing zon…
Abstract As a fundamental research of a calcined defluorinated phosphate containing a small amount of sodium, the system Ca3(PO4)2(tricalcium phosphate, T) - CaNaPO4(Rhenanite, R) was studied by high temperature X-ray diffraction, differential thermal analysis, etc., and the phase diagram determined. During heating, T…