Materials Research Bulletin
About: Materials Research Bulletin is an academic journal. The journal publishes majorly in the area(s): Crystal structure & Dielectric. It has an ISSN identifier of 0025-5408. Over the lifetime, 15895 publication(s) have been published receiving 347861 citation(s).
Papers published on a yearly basis
01 Jun 1980-Materials Research Bulletin
TL;DR: In this paper, a new system LixCoO2 (0 Li x CoO 2 Li ) is proposed, which shows low overvoltages and good reversibility for current densities up to 4 mA cm−2 over a large range of x.
Abstract: A new system LixCoO2 (0 Li x CoO 2 Li . Preliminary voltage-composition curves show low overvoltages and good reversibility for current densities up to 4 mA cm−2 over a large range of x.
01 Mar 1988-Materials Research Bulletin
TL;DR: In this article, the crystal structure of LiSbWO6 was solved from X-ray powder diffraction data and the structure was refined using Rietveld profile refinement principles.
Abstract: The crystal structure of LiSbWO6 is solved from X-ray powder diffraction data. The cell is orthorhombic (space group Pbcn, Z = 4) with a = 4.6664(1) A , b = 17.4435(5) A , c = 4.9941(2) A . Initial positional parameters for antimony and tungsten were obtained from direct methods applied on 307 reflexions which were derived from a modified Rietveld analysis working without structural model. The structure was refined using Rietveld profile refinement principles ; the final reliability factors (%) are Rx = 2.1, RWP = 6.5. The structure derives from PbO2-α by a tripling of the b axis of PbO2 with a full cationic order, unlike the columbite structure which is related to PbO2-α by a tripling of the a-axis.
01 Jan 1968-Materials Research Bulletin
TL;DR: In this article, the analysis of the infrared absorption bands in amorphous Ge which correspond to transitions between the three branches of the valence band has shown that the wave functions are delocalized over distances of the order 102A.
Abstract: The analysis of the infrared absorption bands in amorphous Ge which correspond to transitions between the three branches of the valence band has shown that the valence band wave-functions are delocalized over distances of the order 102A. This is in sharp contrast with the observed low electrical conductivity. Possible reasons for this discrepancy are discussed. A general formula for absorption in amorphous structures is discussed and applied to the analysis of the absorption edges in Ge and Si.
01 Feb 1973-Materials Research Bulletin
TL;DR: In this article, the possibility of a new kind of electronic state corresponding roughly to Pauling's idea of resonance valence bonds in metals was pointed out, and an estimate of its energy was made in one case.
Abstract: The possibility of a new kind of electronic state is pointed out, corresponding roughly to Pauling's idea of “resonating valence bonds” in metals. As observed by Pauling, a pure state of this type would be insulating; it would represent an alternative state to the Neel antiferromagnetic state for S = 1/2. An estimate of its energy is made in one case.
01 May 1978-Materials Research Bulletin
TL;DR: In this article, a series and parallel model for composite piezoelectric and pyroelectrics is presented, which leads to several interesting results, such as a diphasic pyroelectric in which neither phase is pyrocharged.
Abstract: Connectivity is a critical parameter in composites designed for use as piezoelectric transducers or as pyroelectric detectors. There are ten important connectivity patterns in diphasic solids, ranging from a 0-0 unconnected checkerboard pattern to a 3-3 pattern in which both phases are three dimensionally self-connected. Processing methods for manufacturing some of these patterns are described. Series and parallel models for composite piezoelectrics and pyroelectrics lead to several interesting results, such as a diphasic pyroelectric in which neither phase is pyroelectric. The models are also helpful in interpreting the structure-property relations in single-phase materials where the crystal structures mimic certain connectivity patterns.
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