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Interface‐related degradation problems in PbZr x Ti 1 − x O 3 (PZT) thin‐ film nonvolatile memories have led to the search for alternate electrode materials to replace the conventional metal electrodes. In this work, the suitability of ceramic electronic conductors [ e.g. , ruthenium oxide ( RuO 2 ) and indium‐tin‐oxi…
Thin films of (Ba 0.65 Sr 0.35 )TiO 3 (BST) have been prepared by an rf-sputtering method at substrate temperatures of 500 to 700°C. The dielectric constant of these films ranges from 190 to 700 at room temperature. This value changes with the grain size rather than the film thickness. The dielectric constant of about…
This paper concentrates on two areas of information about diffraction gratings for students and instructors of instrumental analysis: the mathematical analysis typically found in books on optics and information that adds interest and a fresh perspective to the study and selection of diffraction gratings: a description…
The title compounds were prepared and characterized by X-ray powder diffraction, scanning electron microscopy, vibrational and electronic spectroscopy, and magnetic susceptibility measurements. Indirect evidence supports polymeric one-dimensional chain structures involving double pyrazolate bridges linking pseudo-tetr…
Metal filled organic and EMI coatings affect the fire performance properties of engineering plastics. Zinc arc spray, zinc/epoxy, and zinc borate/epoxy coatings on modified-polyphenylene oxide (m-PPO) are particu larly effective. The results from non-flaming NBS smoke chamber tests show a dramatic reduction in smoke f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThree novel Zintl phases in the magnesium-lanthanum-antimony system based on intergrowth of LaSb and Mg3Sb2 slabsAshok K. Ganguli, Young Uk Kwon, and John D. CorbettCite this: Inorg. Chem. 1993, 32, 20, 4354–4359Publication Date (Print):September 1, 1993Publication History P…
Abstract (NH 4 ) 3 [La(CH 3 COO) 6 ] · 1/2 H 2 O erhält man in Form von Einkristallen durch Erhitzen von La 2 O 3 bzw. La(CH 3 COO) 3 · 1,5 H 2 O mit einem Überschuß von Ammoniumacetat in Methanol. Die Röntgenstrukturanalyse (trigonal, R 3 , Z = 6, a = 1 365,0(3) pm, a = 2 360(1) pm, R = 0,088, R w = 0,061 zeigt, daß…
Abstract Einkristalle der wasserfreien Seltenerd‐Acetate mit Lutetium (Typ 1) und Holmium (Typ 2) wurden aus den verdünnt essigsauren Lösungen ihrer Oxide durch Aussalzen mit Caesiumacetat bei ca. 120°C erhalten. Die Kristallstrukturen [Lu(CH 3 COO) 3 : orthorhombisch, a = 825,85(8), b = 1 398,1(2), c = 823,9(1) pm, V…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTColored merocyanine aggregates: long-lived crystals of large size (10-100 .mu.m) and deaggregation of small aggregates in solutionsYoshiyuki Onai, Michiko Mamiya, Toshio Kiyokawa, Kenichi Okuwa, Makoto Kobayashi, Hisanori Shinohara, and Hiroyasu SatoCite this: J. Phys. Chem.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFactors governing the charge density wave patterns of layered transition-metal compounds of octahedral coordination with d2 and d3 electron countsCarme Rovira and Myung Hwan WhangboCite this: Inorg. Chem. 1993, 32, 19, 4094–4097Publication Date (Print):September 1, 1993Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleDecacyclene: a molecular propeller with helical crystalsDouglas M. Ho and Robert A. Pascal, Jr.Cite this: Chem. Mater. 1993, 5, 9, 1358–1361Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://pubs.acs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStrength of incompatible amorphous polymer interfacesJulious L. Willett and Richard P. WoolCite this: Macromolecules 1993, 26, 20, 5336–5349Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://pubs.…
In a previous paper [Grimmer (1991). Acta Cryst. A47, 226–232], general connections were given between the forms of tensors describing equilibrium properties in materials with point-group symmetry described by any of the 122 crystallographic Shubnikov point groups. In the present paper, it is shown how the results mus…
This article is intended to review recent results of simultaneous mechanical and Fourier transform infrared spectroscopic—so-called rheo-optical—measurements for polymer deformation studies. The technique will also be discussed in terms of the application of Fourier transform near-infrared light-fiber and Raman spectr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrosynthesis of KBiO3 (potassium bismuth oxide): a potassium ion conductor with the KSbO3 (potassium antimony oxide) tunnel structureTu N. Nguyen, Daniel M. Giaquinta, William M. Davis, and Hans Conrad zur LoyeCite this: Chem. Mater. 1993, 5, 9, 1273–1276Publication Date…
Lithostathine is a pancreatic secretory protein which controls CaCO3 crystal growth in pancreatic juice. Trypsin hydrolysis of the molecule generates two fragments of 11 and 133 amino acids. The N-terminal undecapeptide bears the inhibitory activity for crystal growth. We demonstrate that the C-terminal part of the mo…
Abstract Plasticizers for poly(vinyl chloride) may be organized into eight chemical families and by seven key performance criteria. Cost‐effective general‐purpose phthalates provide a base line for comparing all other plasticizers. The wide range of performance characteristics associated with various phthalate isomers…
The calculated XRD profiles of alite (impure Ca 3 SiO 5 , the major phase in Portland cement) derived from seven postulated crystal structures for alite were compared with a measured alite profile, extracted from the XRD pattern of a standard Portland cement. Only two of these profiles were found suitable for multipha…
Abstract Polypropylene (PP) powder was extruded in the presence of peroxide and multifunctional monomers at varying concentrations. With increasing peroxide concentration, MFI increased almost linearly, whereas hardness, modulus, and impact strength decreased, and the results were interpreted in terms of decreased mol…
An analytic design of hybrid achromats that combine refractive and diffractive elements is presented. The design procedure does not rely on paraxial approximations and involves two separate stages. In the first stage the chromatic aberrations are corrected for the paraxial rays, and in the second stage the spherical a…