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Displaying records 961 to 970 of 1000 records.
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961. Development of Multilayer Analyzer Array Detectors for X-Ray Fluorescence at the Third Generation Synchrotron Source
Topic: Ceramics
Published: Date unknown
Authors: K Zhang, G Rosenbaum, R Liu, G Bunker, C Y Liu, Daniel A Fischer
Abstract: The development of Multilayer Analyzer Array Detector (MADD) for X-ray fluorescence is to eliminate the count rate limitation encountered with the multi-element Ge detector. A 24-element multilayer detector has been fabricated which is tunable in a ...

962. Dielectric and Structural Studies of Ba^d2^ReNb^d3^Ti^d2^O^d15^ (BReNTO^d15^,Re=Bi^u3+^,La^u3+^,Nd^u3+^,Sm^u3+^,Gd^u3+^) Tetragonal Tungsten Bronze Structured Ceramics
Topic: Ceramics
Published: Date unknown
Authors: Igor Levin, M Stennett, I Reaney, G Miles, D I Woodward, C Kirk, A R West
Abstract: The structure and dielectric properties of a new family of tetragonal tungsten bronze structured ceramics with the general formula, Ba^d2^ReNb^d3^Ti^d2^O^d15^ (BReNTO^d15^,Re=Bi^u3+^,La^u3+^,Nd^u3+^,Sm^u3+^,Gd^u3+^) have been investigated. BLNTO15 T ...

963. Direct Measurement of Valence Charge Asymmetry in GaAs Using X-Ray Standing Waves
Topic: Ceramics
Published: Date unknown
Authors: E Nelson, Joseph C Woicik
Abstract: Through detection of valence photoelectrons, the technique of x-ray standing waves directly measured the charge asymmetry of the GaAs valence band. Using the back-reflection geometry for the (111) and (111) diffraction planes, we determine from the ...

964. Displacive Phase Transition in SrTiO^d3^ Thin Films Grown on Si(001)
Topic: Ceramics
Published: Date unknown
Authors: F S Aguirre-Tostado, A Herrera-Gomez, Joseph C Woicik, R Droopad, Z Yu, D G Schlom, E Karapetrova, P Zschack
Abstract: Polarization dependent x-ray absorption fine structure measurements performed at the Ti K edge together with x-ray diffraction have been used to study the local structure in SrTiO3 thin films grown epitaxially on Si(001). SrTiO3 layers on Si(001) ar ...

965. Domain Pinning in Lead Zirconate Titanate Thin Films
Topic: Ceramics
Published: Date unknown
Authors: J Blendell, Grady S White
Abstract: Atomic force microscopy measurements of the piezoelectric response of a lead zirconate titanate (PZT) thin film detect domain pinning sites along grain boundaries. The locations of these sites are reproducible and 180 degrees domains appear to exten ...

966. Dopant Location Identification in Nd^u3+^-Doped TiO^d2^ Nanoparticles
Topic: Ceramics
Published: Date unknown
Authors: W Li, A I Frenkel, Joseph C Woicik, C Ni, S I Shah
Abstract: Doping large bandgap semiconductors is typically done in order to enhance photocatalytic, photovoltaic and other chemical and optoelectronic properties. The identification of dopant position and its local environment is essential to exploring the do ...

967. Duality of Dislocation Content of Grain Boundaries
Topic: Ceramics
Published: Date unknown
Authors: John W. (John W.) Cahn, Yuri Mishin, A Suzuki
Abstract: The Frank-Bilby equation (FBE) can give many solutions for the dislocation content of a grain boundary (GB); most of them are considered to have little physical reality except in limited ranges of the angles which characterize low-angle GBs. We expl ...

968. Effect of Abrasive Wear on Interfacial Shear Sliding Resistance in SiC Fiber-Reinforced Al^d2^0^d3^
Topic: Ceramics
Published: Date unknown
Authors: Kakisawa, Y Kagawa, Lin-Sien H Lum
Abstract: Interface wear behavior and its effects on the shear frictional sliding resistance in fiber-reinforced ceramics have been studied using SiC fiber (SCS-6)-reinforced A1203 matrix composite. Thin specimen pushout tests were performed and surface wear ...

969. Effect of Adhesion Hysteresis and Roughness Upon Solid-Liquid and Solid-Solid Friction
Topic: Ceramics
Published: Date unknown
Author: Michael Nosonovsky
Abstract: Mechanisms of energy dissipation during solid-solid and solid-liquid friction are discussed. A conservative van der Waals adhesion force, when combined with surface imperfectness, such as deformation, leads to adhesion histeresis (AH). When an asperi ...

970. Effect of Colloidal Probe Random Surface Features on Adhesion
Topic: Ceramics
Published: Date unknown
Authors: Seung Ho Yang, Stephen M. Hsu
Abstract: We have uncovered the fact that colloidal probes often have random surface features which when not properly accounted for, can significantly affect the magnitudes of the measured adhesive forces using atomic force microscopes (AFM). Colloidal probes ...

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