Materials Literature
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Abstract The tensile properties of an unfilled GR‐S rubber were measured with an Instron tensile tester at strain rates between 0.158 × 10 −3 and 0.158 sec. −1 and at fourteen temperatures between −67.8 and 93.3°C. The tensile strength and ultimate strain at the various strain rates and temperatures were superposed to…
The linear coefficient of thermal expansion of silicon, germanium, and indium antimonide has been measured in the range 4.2\ifmmode^\circ\else\textdegree\fi{}K-300\ifmmode^\circ\else\textdegree\fi{}K using an interferometric method. In the cases of silicon and germanium, these values are used to calculate the variatio…
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As a result of a wide variety of studies on photosynthesis in living plants and plant fragments, together with the development of photosensitive, photovoltaic junctions in inorganic crystals and the discovery and exploration of semiconduction in organic molecular substances, a suggestion has been made that the primary…
By means of absorption and photoconductivity measurements, the following band gaps were found: ${\mathrm{Na}}_{3}$Sb---1.1 ev; ${\mathrm{K}}_{3}$Sb---1.1 ev; ${\mathrm{Rb}}_{3}$Sb---1.0 ev; ${\mathrm{Cs}}_{3}$Sb---1.6 ev; and ${(\mathrm{NaK})}_{3}$Sb---1.0 ev. A model has been derived for the photoemission from these…
Abstract The beam of an electron microscope has been used to dehydrate single crystals of magnesium hydroxide to magnesium oxide. Electron diffraction photographs and electron micrographs were taken at various stages to follow the crystallographic and morphological changes which accompany decomposition. The decomposit…
Certain ZnS crystals show electroluminescence predominantly near the cathode. The major emission from Cu-activated crystals occurs as a burst of light when the exciting voltage is suddenly removed, as electrons flowing back toward the cathode to neutralize the barrier charge recombine with ionized luminescent centers.…
(N${\mathrm{H}}_{4}$)HS${\mathrm{O}}_{4}$ is ferroelectric in the temperature range between -3\ifmmode^\circ\else\textdegree\fi{}C and -119\ifmmode^\circ\else\textdegree\fi{}C. The symmetry of the room-temperature phase is $\frac{P{2}_{1}}{c}$; the ferroelectric phase is also monoclinic, with space group $\mathrm{Pc}$…
Observations are reported on the behavior of several fission product elements in molten NaF-ZrF4-UF4 fuels, irradiated in capsule experiments, forced-convection in-pile loop experiments, and in the Aircraft Reactor Experiment (ARE). The rare gases have been observed to escape readily from the fuels in dynamic tests, a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSalt Effect Correction in Determining Soluble Silica in Sea Water by Silicomolybdic Acid MethodG. S. BienCite this: Anal. Chem. 1958, 30, 9, 1525–1526Publication Date (Print):September 1, 1958Publication History Published online1 May 2002Published inissue 1 September 1958htt…
Abstract A knowledge of the structure of vulcanized rubber is essential to the interpretation of vulcanization and oxidation studies and the physical properties of the material. In the present work an infrared study has been made of structures resulting from a number of different methods of vulcanization. Sulfur vulca…
The Hall effect in Lu, Yb, Tm, and Sm has been studied as a function of temperature for the temperature range 40\ifmmode^\circ\else\textdegree\fi{}K to 320\ifmmode^\circ\else\textdegree\fi{}K in a magnetic field of 5500 oe. The Hall coefficient for Yb is positive, while the Hall coefficients for Lu and Tm are negative…
The use of B4C for the control of a sodium-cooled reactor is considered from a design standpoint. Nuclear, mechanical, and physical properties as well as irradiation data are presented. The ability of the B4C lattice structure to retain helium produced from the neutron capture of B10 is discussed.
Measurements have been made of the amplitudes of the maximum tensile stress pulses which could propagate along rods of glass and of two glasslike plastics (polystyrene and polymethylmethacrylate) without producing fracture. Small quantities of explosive were detonated at one end of the rod so that a compression pulse…