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ceramics
http://www.drachenwald.sca.org/files/a%26s/criteria/ceramics.pdf Includes functional objects crafted of clay, with or without
decoration. Entrants who substitute modern glazes, and who note the reasons for the substitution, will not lose points in Authenticity. 1-2: Generally period, with some obviously modern elements present 3-4: Obvious mixture of elements from different cultures or periods (e.g. Florentine motifs to decorate a 9th century oil lamp, etc.) 5-6: Overall period style and execution, minor inconsistencies (e.g. reproduction of earthenware piece in stoneware) 7-8: Form, construction techniques, and decoration are period; materials are period or reasonable equivalents. 9-10: Special effort to achieve a completely period product by use of period design, materials, tools, techniques, etc.; e.g. glazes made by hand, fired in a wood-burning kiln, etc. D-109 http://www.dxcicdd.com/01/pdf/D-109.pdf Critical issues for Mo5Si3 as an ultra-high-temperature material include the understanding of the structure and the reduction of high anisotropy in the coefficient of thermal expansion (CTE). Parallel beam optics and a low temperature gradient in the furnace improved the experimental precision dramatically.The anisotropy is due to an elastically more rigid basal plane and a higher anharmonicity along the c-axis. Work sponsored by the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences; and by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Transportation Technologies, as part of the High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory. lecture4 http://www.ece.gatech.edu/research/labs/vc/packaging/lectures/lecture4.pdf materials, dielectrics, electroless, polymer, substrate, packaging, temperature, resistance, stress, stability, CTE. · chemical properties - must minimize corrosion or other reliability concerns 3. IF6-01-Pages22-27 electrolyte, conductivity, materials, oxide, ionics, ceramics, chemicals, transport, design, cell, fuel. Depending on their defect chemistry and environment, these materials can exhibit exclusively ionic (electrolyte) or electronic conduction, or mixed (both ionic and electronic) conduction. Operating principle of a solid oxide fuel cell. This continuing symposia is a forum for current advances in solid-state ion conducting materials, regardless of the class of materials or whether the solid-state is amorphous or crystalline, and the design, fabrication, and performance of devices that utilize them. Topics covered include modeling and characterization of defect equilibria, ionic and electronic transport, interfacial and electrocatalytic properties of ion conducting ceramics, novel synthesis and processing of thin films, membranes, and nanostructured materials or devices; the effect of nanostructures on ionic transport and catalytic activity; electrode kinetics, interfacial phenomena, and electrode microstructure pertaining to chemical sensors, fuel cells, gas separation membranes and reactors, solidstate battery and microbattery electrodes. nature emission, coherence, spectrum, grating, temperature, Astrophys, star, accretion, protostars, thermal source, massive stars. The accretion luminosity Lacc f accGmpmÙp=rp, where facc is a factor of order unity accounting for energy radiated by an accretion disk, advected into the star or converted into kinetic energy of outflows, and where the stellar radius rp may depend sensitively on the accretion rate mÙp. Narrow angular emission lobes similar to antenna lobes are observed and the emission spectra of the source depends on the observation angle---the so-called Wolf effect 3,4. To observe this effect, we have taken several spectra of the reflectivity of the surface at different angles. In order to prove experimentally the role of the surface wave, we have done spectral measurements of the emissivity for s- and ppolarization. | ||