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The thermal expansivity of a number of calcium, strontium , and barium borate glasses are reported.The ex pansivity of the calcium and strontium borates increases with increasing alkaline-earth oxide concentration.Th e expansivity of the barium borate glasses is a m inimum at about 20 mole percent of barium oxide.The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Pure Potassium MetaniobateArnold Reisman, Frederic Holtzberg, Sol Triebwasser, and Melvin BerkenblitCite this: J. Am. Chem. Soc. 1956, 78, 4, 719–720Publication Date (Print):February 1, 1956Publication History Published online1 May 2002Published inissue 1 Febr…
Powder deposit patterns obtained by the authors on single crystals of 3% silicon iron are consistent with a description of the processes of domain phase creation in terms of nucleation at inclusions in the surfaces. Domain nucleation is discussed in relation to various magnetic properties.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh Temperature Heat Content and Heat Capacity of Al2O3 and MoSi2.B. E. Walker, J. A. Grand, and R. R. MillerCite this: J. Phys. Chem. 1956, 60, 2, 231–233Publication Date (Print):February 1, 1956Publication History Published online1 May 2002Published inissue 1 February 195…
Abstract X-ray diffraction patterns and cation-exchange data are presented for centrifuged Wyoming bentonite to demonstrate the heterogeneous nature of montmorillonite. It has been shown that in the bentonite samples studied, the montmorillonite can be separated into at least two fractions. One phase consists of essen…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Willis A. Rosser, Henry Wise; Thermal Decomposition of Nitrogen Dioxide. J. Chem. Phys. 1 Februar…
Abstract Analyses of samples of kaolinitic, illitic, and montmorillonitic clay materials exposed to artificial sea water for periods of six months to five years have yielded some evidence to support the contention that chloritic and illitic clay types may ultimately develop from montmorillonitic material in the marine…
Guanidine aluminum sulfate hexahydrate (C${\mathrm{N}}_{3}$${\mathrm{H}}_{6}$)Al${(\mathrm{S}{\mathrm{O}}_{4})}_{2}$\ifmmode\cdot\else\textperiodcentered\fi{}6${\mathrm{H}}_{2}$O is ferroelectric from as high a temperature as it will stand for a short time (about 200\ifmmode^\circ\else\textdegree\fi{}C), down to tempe…
Abstract High‐energy electrons were used to crosslink a series of polydimethylsiloxanes. Equilibrium tension measurements at low elongations were used to determine the number of chains between crosslinks as given by the kinetic theory of elasticity. After a rapid increase at low radiation doses the number of chains wa…
Abstract This paper examines the relationship between the stress–strain properties of highly swollen natural rubber vulcanizates and their equilibrium volume swelling. It is shown that the empirical relationship obtained can be described equally well by either the Flory‐Huggins equation or the Flory modification of th…
Abstract Natural rubber vulcanizates have been prepared by a method permitting determinations by chemical analysis of the number of crosslinking introduced. The crosslinking agent was di‐ tert ‐butyl peroxide, and the peroxide and its decomposition products– tert ‐butanol, acetone, methane, and ethane—were determined…
Rapid corrosion occurs through pitting when annealed Type 302 stainless steel sheets are suspended in ferric chloride solution. Dissolution of sample can approach completion with unexpectedly little alteration in appearance of surface. Rate of weight loss with different samples is surprisingly similar with the followi…
The theory of magnetic domains is reviewed and a comparison is made with the ferroelectric case. The known facts regarding domain processes in barium titanate are summarized and an attempt is made to apply these facts to the formulation of mechanisms for several electrical processes in ceramic barium titanate. It is s…
Phosphors of the ZnS-CdS type under an applied ac field exhibit capacity changes when illuminated. The measurements indicate that in some phosphors the change in capacity may not be attributed solely to a change in ohmic resistance. A possible explanation for the mechanism involved in these cases is given. Capacity de…
The relative resistance to mass transfer in liquid lead of 24 metals and alloys were measured. Tests were performed in small quartz thermal convection loops. The test temperature was about 800 C with a thermal gradient of 300 C existing across the loops. Of the metals and alloys studied, only columbium and molybdenum…
Abstract X-ray analyses of the clay minerals from thousands of sediments indicate that any of the major clay minerals can occur in abundance in any of the major depositional environments and there is no consistent coincidence between specific clay minerals and specific depositional environments. It is concluded that t…
The crystal structures of the following binary intermetallic compounds of plutonium are reported: PuAl 2 , PuAl 3 , PuAl 4 , PuBe 13 , PuCo 2 , PuFe 2 , PuMn 2 , PuNi 2 , PuNi 5 , and Pu 2 Ni 17 . In addition, the unit cell dimensions are reported for PuAg 3 .
A previous theory for the mobility of molecules in glasses near the glass temperature has been extended in an effort to deduce the semiempirical relation proposed by Williams, Landel, and Ferry. By focusing attention upon the free volume, one is able to derive their relation in a straightforward fashion subject to app…
The results of measurements on single crystals of KNb${\mathrm{O}}_{3}$ are reported. From the dielectric constant and spontaneous polarization measurements the coefficients of the first three terms of the free energy expressed as a power series in the polarization can be found. The detailed behavior of single domain…
Summary A theory of creep buckling is presented in which the instantaneous elastic and plastic deformations following the application of a load, as well as the steady creep deformations, are considered in an approximate manner. Equations are given from which the critical time, that is, the time elapsing between load a…