Duane Dimos Biography
Abstract not provided.
Publications
Sandia National Laboratories An Overview
Abstract not provided.
MS&T FY07 Overview_final_Dimos
Abstract not provided.
TMS NINE (The Minerals Metals & Materials Society - National Innovation Institutes as a New Model)
Abstract not provided.
The National Institute for Nano-Engineering
Abstract not provided.
NANOTECHNOLOGIES FOR ADVANCED MICROSYSTEMS
Abstract not provided.
SNL Engineering Sciences Overview
Abstract not provided.
A new government, industry and university partnership through discovery science and engineering innovation institutes
AIChE Annual Meeting, Conference Proceedings
Abstract not provided.
The National Institute for Nano-Engineering (NINE)
Abstract not provided.
NINE_Brief_FrenchDelegation
Abstract not provided.
Creating the Next Generation of Innovatores and Innovations Through Discovery Science and Engineering Innovation Institutes
Abstract not provided.
The National Institute for Nano Engineering Creating the Next Generation of Innovators & Innovations
Abstract not provided.
Material science and technology annual external review panel
Abstract not provided.
Materials processing, properties and performance (MTE 2.4)
Abstract not provided.
Next-generation microsystems : integration technologies and opportunities for ceramics
Abstract not provided.
Scientific challenges and capabilities for the future
Abstract not provided.
Colloidal processing of chemically prepared zinc oxide varistors. Part 1, milling and dispersion of powder
Proposed for publication in the Journal of Materials Research.
Chemically prepared zinc oxide powders are fabricated for the production of high aspect ratio varistor components. Colloidal processing was performed to reduce agglomerates to primary particles, form a high solids loadingslurry, and prevent dopant migration. The milled and dispersed powder exhibited a viscoelastic to elastic behavioral transition at a volume loading of 43-46%. The origin of this transition was studied using acoustic spectroscopy, zeta potential measurements, and oscillatory rheology. The phenomenon occurs due to a volume fraction solids dependent reduction in the zeta potential of the solid phase. It is postulated to result from divalent ion binding within the polyelectrolyte dispersant chain and was mitigated using a polyethylene glycol plasticizing additive. This allowed for increased solids loading in the slurry and a green body fabrication study to be presented in our companion paper.
Colloidal processing of chemically prepared zinc oxide varistors. Part 2, near net shape forming and fired electrical properties
Proposed for publication in the Journal of Materials Research.
Chemically prepared zinc oxide powders were processed for the production of high aspect ratio varistor components (length/diameter >5). Near-net-shape casting methods including slip casting and agarose gelcasting were evaluated for effectiveness in achieving a uniform green microstructure that densifies to near theoretical values during sintering. The structure of the green parts was examined by mercury porisimetry. Agarose gelcasting produced green parts having low solids loading values and did not achieve high fired density. Isopressing the agarose cast parts after drying raised the fired density to greater than 95%, but the parts exhibited catastrophic shorting during electrical testing. Slip casting produced high green density parts, which exhibit high fired density values. The electrical characteristics of slip-cast parts are comparable with dry-pressed powder compacts.
Fracture Behavior of Double-Ion-Exchanged Glass
Abstract not provided.
Calculation of Hamaker constants in non-aqueous fluid media
Calculations of the Hamaker constants representing the van der Waals interactions between conductor, resistor and dielectric materials are performed using Lifshitz theory. The calculation of the parameters for the Ninham-Parsegian relationship for several non-aqueous liquids has been derived based on literature dielectric data. Discussion of the role of van der Waals forces in the dispersion of particles is given for understanding paste formulation. Experimental measurements of viscosity are presented to show the role of dispersant truncation of attractive van der Waals forces.
20 Results