Materials Literature
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The phase relations in a portion of the 1375° isotherm of the system Sr‐Ti‐O were determined. The following ternary phases were identified: Sr 2 TiO 4 , Sr 3 Ti 2 O 7 , Sr 4 Ti 3 O 10 , SrTiO 3 (ss), and what is believed to be SrTi 12 O 19 . The experimental techniques used in the determination of tha phase diagram ar…
The technology of making SmCo5 magnets with energy products of 20 × 106 GOe is described. This technology consists of the preparation of a powder by grinding, aligning the powder particles in a magnetic field, and cold pressing by applying a uniaxial deformation at 20 kbar. The permanent magnetic properties of the SmC…
The main types of noise in ferromagnetic materials are thermal or Nyquist noise, excess noise, and Barkhausen noise. They differ in magnitude as well as in the frequency dependence of their associated power spectra. The comparatively weak Nyquist noise is generated by the thermal energy of the conduction electrons and…
SUMMARY: Many attributes contribute to texture, and panel tests should be so arranged that all these attributes are analyzed. The texture profile concept used by Szczesniak and her co‐workers is critically examined, and several modifications are proposed. The new scheme consists of primary, secondary and tertiary cate…
As a part of our structural, optical, and electrical studies of amorphous versus crystalline GeTe films, this paper (Part I) reports on the growth and structural properties of the thin-film polymorphs (amorphous, rhombohedral, and NaCl) of GeTe. When deposited above ∼130°C, the GeTe films are polycrystalline. Epitaxia…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Properties of Block Polymers. I. Poly-α-methylstyrene-Polyisoprene-Poly-α-methylstyreneLewis J. Fetters and Maurice MortonCite this: Macromolecules 1969, 2, 5, 453–458Publication Date (Print):September 1, 1969Publication History Published online1 May 2002Publis…
This paper presents measurements of the acoustic emission from gas bubbles of controlled sizes “seeded” into water and glycerol-water mixtures and subjected to sound fields over a wide range of frequencies and intensities up to, and beyond, the transient cavitation threshold. The emission from unprepared liquids was a…
Hydrothermal solutions, advanced argillic-type alteration, alunite-kaolinite and alunite-muscovite compositional relations
Summary A specimen from Långban, Sweden, was found to consist largely of sjögrenite in which segregation and ordering of the metal cations had occurred, yielding an intergrowth of regions of two main types with compositions probably of or near Mg 2/3 Fe 1/3 (OH) 2 (CO 3 ) 1/6 (H 2 O) 0·4 and Mg 12/13 Fe 1/13 (OH) 2 (C…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvent Effects on the Preferred Conformation of Poly(ethylene glycols)Kang-Jen Liu and John L. ParsonsCite this: Macromolecules 1969, 2, 5, 529–533Publication Date (Print):September 1, 1969Publication History Published online1 May 2002Published inissue 1 September 1969https…
Abstract The circular dichroism (CD) spectrum of an unordered polypeptide chain does not correspond, as has been assumed heretofore, to that of a charged chain such as poly‐ L ‐glutamic acid or poly‐ L ‐lysine. The latter have been shown to have locally ordered structures with characteristic CD spectra. We have now ob…
Magnetic properties of single crystal of CsCuCl 3 , CsNiCl 3 , RbNiCl 3 , CsCoCl 3 , and RbFeCl 3 were investigated by the measurements of magnetic susceptibilities, magnetic torques, ESR absorptions from liquid helium temperature to room temperature. The experimental results were interpreted in terms of linear antife…
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Summary Generally substances are more stable in a crystalline than in a glassy state. Therefore, to form a glass, crystallization must be bypassed. Under certain conditions, the melts of many substances can be cooled to the glass state. Whether or not the melt of a given material forms a glass is determined principall…