Materials Literature
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The conductivity of a number of barium titanate single crystals was measured as a function of temperature, applied field, electrode material, thickness and time. Typical results are given, and tentative theories put forward to account for the observed activation energies, the striking non-ohmic nature of the conductiv…
The angular distributions of secondary electrons from (001) faces of copper and nickel single crystals have been measured for secondaries in four energy ranges (0-10 ev, 10-20 ev, 20-40 ev, and 40-90 ev) for primary electron energies of 250, 500, and 800 ev. Fine structure was observed which consisted of weak peaks in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE HEAT CAPACITY AND THERMODYNAMIC FUNCTIONS OF URANIUM FROM 5 TO 350°K.1Howard E. Flotow and Harold R. LohrCite this: J. Phys. Chem. 1960, 64, 7, 904–906Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://…
A grooved, tensile type, accelerated stress corrosion test is described by which austenitic stainless steels were tested in both the solution and the vapor phase of boiling 42 percent magnesium chloride. Of the commercial alloys tested, Types 310 and 314 stainless steel offered considerably greater resistance to crack…
Single crystals of anthracene have been grown from melts of zone-purified material, in an all-glass oven. The important factors which governed the successful growth of single crystals by the moving-vessel technique have been investigated, viz. the purity of the anthracene, the temperature gradient, the shape of the gr…
Stress‐strain curves of single crystals of magnesia compressed in the [100] direction are reported at temperatures from –196° to 1200°C.; curves are also shown for different rates of loading at room temperature. The crystals show considerable ductility at all temperatures and at room temperature can be deformed plasti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Study of Atomic Absorption SpectroscopyA. C. MenziesCite this: Anal. Chem. 1960, 32, 8, 898–904Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://pubs.acs.org/doi/10.1021/ac60164a001https://doi.org/10.102…
As a first approach to the study of the dependence of the coercive force on imperfections in materials which have high magnetocrystalline anisotropy, the following one-dimensional model is treated. A material which is infinite in all directions has an infinite slab of finite width in which the anisotropy is 0. The coe…
Phycologists have long recognized that there are algae which grow only in torrents, or at least grow best in rapidly running water. Among these are Lemanea, Hildenbrandtia, Audouinella, Batrachospermum spp., Hydrurus, and Cladophora spp. Microscopic types are represented by Gongosira, Lithoderma, Chamaesiphon, and sev…
Abstract SP rubbers give greater latitude in extrusion and calendering processes by extending the range of operating conditions and giving greater scope for compounding for good physical properties. Compounds based on SP rubbers extrude smoothly with lower die swell at lower temperatures and higher viscosities. Greate…
The effect of water content on the corrosion resistance of a proprietary borosilicate glass is discussed. Several glass smelting methods were employed to produce an alkali borosilicate glass with various amounts of water within the body of the glass. Infrared studies in the region 2.7 to 3.0 P showed that a decrease i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen Cyanide Stability and Heat of Polymerization.E. H. Gause and P. D. MontgomeryCite this: J. Chem. Eng. Data 1960, 5, 3, 351–354Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://pubs.acs.org/doi/10.…
The dielectric properties of some twenty solid solution systems based on sodium niobate are described, the additives being classified into ABO 3 , AB 2 O 6 , and A 2 B 2 O 7 types. Properties of the systems NaNbO 3 ‐BaTiO 3 , NaNbO 3 –SrTiO 3 , and NaNbO 3 ‐Sr 2 Ta 2 O 7 are described in some detail. A composition in…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTTHEORETICAL PATHWAYS FOR THE REDUCTION OF N2 MOLECULES IN AQUEOUS MEDIA: THERMODYNAMICS OF N2Hn1Norman BauerCite this: J. Phys. Chem. 1960, 64, 7, 833–837Publication Date (Print):July 1, 1960Publication History Published online1 May 2002Published inissue 1 July 1960https://pubs.…
Measurements have been made of the thermal conductivity and thermoelectric power of a range of single crystal samples of p- and n-type B1 2 Te 3 between 6 and 200 K. The observed lattice conductivity could be interpreted in terms of scattering by the tellurium isotopes. Measurements on the iodine doped samples showed…
Craters were produced by firing spherical steel projectiles of 316- and 932−in. diam into sandstone and granite at velocities ranging from 300 to 6000 ft/sec. Impact angles of 30, 60, and 90 deg were used for the sandstone and 90 deg for the granite. The craters are formed by two mechanisms: (a) crushing of material i…
Vibrational frequency distributions for the potassium and rubidium halides and for cesium fluoride have been evaluated on the basis of the Born lattice theory by the use of Blackman's numerical sampling method. Both room-temperature and extrapolated 0°K parameters have been used in the calculation. Specific heats, the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTContribution to the Structure of the Ferrichrome Compounds: Characterization of the Acyl Moieties of the Hydroxamate Functions1,2Thomas Emery and J. B. NeilandsCite this: J. Am. Chem. Soc. 1960, 82, 14, 3658–3662Publication Date (Print):July 1, 1960Publication History Publis…
Abstract The ringed structure in polyethylene spherulites was investigated by an x‐ray microdiffraction method. A spherulite with extinction rings whose interval is about 50 μ was observed when viewed under the polarization microscope. An asymmetric x‐ray diffraction fibrous pattern about the b axis was obtained for t…
Abstract Polyvinyl chloride deteriorates primarily by a zipperlike elimination of hydrogen chloride from the polymer and the concomitant formation of a colored and easily ozidizable polyene chain. Baum and Wartman have shown that the elimination is initiated by the rupture of certain especially labile carbon‐chlorine…