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Topic Area: Ceramics

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Displaying records 941 to 950 of 1000 records.
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941. Combinatorial Tools for Inorganic Thin Films
Topic: Ceramics
Published: Date unknown
Authors: Peter K. Schenck, Debra L Kaiser
Abstract: We report the deveopment of a novel dual beam - dual target pulsed laser deposition (PLD) system for the production of compositionally-graded library films for combinatorial thin film materials research. In-situ process monitoring, including high-spe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850623

942. Comparative Dielectric Behavior of PBFe^d1/2^Ta^d1/2^O^d3^ and NaNbO^d3^:Gd Relaxor-Like Crystals
Topic: Ceramics
Published: Date unknown
Authors: I P Raevski, S A Prosandeev, U Waghmare, V V Eremkin, V G Smotrakov, V A Shuvaeva
Abstract: Experimental data obtained for PBFe^d1/2^Ta^d1/2^0^d3^ (PFT) and NaNbO^d3^:Gd (NaNbGd) single crystals show a diffused dielectric permittivity peak that is inherent to relaxor ferroelectrics. However some deviations from the normal relaxor propertie ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850673

943. Comparison of Tensile Creep Measurements on Buttonhead and Pin-Loaded Specimens of Some Silicon Nitride Ceramics
Topic: Ceramics
Published: Date unknown
Author: Ralph Krause
Abstract: Tensile-creep measurements by two experimental techniques on two kinds of silicon nitride ceramics were compared statistically. Some of the measurements were obtained from published investigations conducted elsewhere. One technique uses buttonhead ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850630

944. Comparison of Two Methods for Determining Surface Roughness From Spectrophotometry Data
Topic: Ceramics
Published: Date unknown
Author: L D. Rotter
Abstract: The method of determining the surface roughness of a transparent solid interface by fitting spectrophotometric transmittance and/or reflectance data with a function that models the surface roughness as an effective medium layer is compared with scala ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850327

945. Competing Fracture Modes in Brittle Materials Subject to Concentrated Cyclic Loading in Liquid Environments: Bilayer Structures
Topic: Ceramics
Published: Date unknown
Authors: Yu Zhang, Sanjit Bhowmick, Brian Ronald Lawn
Abstract: A preceding study of the competition between fracture modes in monolithic brittle materials in cyclic loading with curved indenters in liquid environments is here extended to brittle layers on compliant substrates. The fracture modes include outer a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850127

946. Contact Area Correction for Random Surface Roughness on Nanoadhesion
Topic: Ceramics
Published: Date unknown
Authors: Seung Ho Yang, Huan Zhang, Stephen M. Hsu
Abstract: Atomic force microscopes (AFM) have been used to measure adhesion at nanoscale between two surfaces. Colloidal probes are often utilized for such measurements because they provide much lower contact pressures and controlled contact geometry, facilit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850937

947. Contact Damage Produced in Si and MgO by Nanoindentation
Topic: Ceramics
Published: Date unknown
Author: B Hockey
Abstract: TEM has been used to characterize the defect structures produced in Si and Mgo by Berkovich indentation at loads ranging from 0.1 mN to 5 mN. Plane-section observations are used to describe the nature of the defects and their spatial distribution ab ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850932

948. Control of Nanophase Defects During Ceramic Melt Processing of Bi2Sr2CaCu2O8+x High Tc Superconductors
Topic: Ceramics
Published: Date unknown
Authors: T J Haugan, Winnie K Wong-Ng, Lawrence P. Cook, H J Brown, L Swartzendruber
Abstract: To improve the critical current density of Bi^d2^Sr^d2^CaCu^d2^O^d8+x^ high temperature superconductors (HTS) in high magnetic field applications (> 1 T from 20 K to 50 K), it is necessary to introduce a high density ({approximately equal to} 5 per 1 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850395

949. Controlled Synthesis of Single-Crystalline InN Nanorods
Topic: Ceramics
Published: Date unknown
Authors: Igor Levin, Albert Davydov, O M Kryliouk, Hyun Jong Park, YongSun Won, T J Anderson, J P Kim, J A Freitas
Abstract: Single-crystalline InN nanorods were successfully grown on c-Al203, GaN, and Si substrates by non catalytic, template-free hydride metal-organic vapor phase epitaxy (H-MOVPE). Stable gas-phase oligomer formation is proposed as the nucleation mechani ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850961

950. Coupling Between Octahedral Tilting and Ferroelectric Order in Tetragonal Tungsten Bronze-Structured Dielectrics
Topic: Ceramics
Published: Date unknown
Authors: Igor Levin, M Stennett, D I Woodward, A R West, I Reaney
Abstract: Strong coupling between local polar displacements and a commensurate octahedral tilting is proposed to explain the onset of classic ferroelectric behavior in tetragonal tungsten bronze-like dielectrics BaLaxNd1-xNb3Ti2O15. The ferroelectric phase tr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850943



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