The results showed that the Yixian clay which has greater specific surface area and weak Lewis acid has a higher activity and lifetime in removal of olefins .

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Surface and Sructure Investigations of Membrane Electrode Assembly in DMFC Lifetime Testing ~

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The research methods of organic coatings failure mechanisms on the surface of submarine are summarized . In the analysis of failure mechanisms and lifetime evaluation electrochemical techniques combining with modern surface analysis techniques and traditional coatings test techniques are studied .

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In stead of plating tin conducting paste is spread on electric contacting surface which obviously reduce the power loss temperature rise and the maintenance work at the contacting point . prolonging the lifetime and lowering the production cost .

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The adsorption of CO revealed that the number of surface Ni atoms increased with the increase of copper content and thereby increased the activity and lifetime of the catalysts leading to the substantial increase of the yield of the CNT from the decomposition of ethylene .

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The propagation lifetime of surface cracks can be forecasted by the Paris method . Due to the difficulty of crack detection and the complexity of crack propagation it is difficult to forecast the propagation lifetime of embedded cracks of work piece in service .

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The defects in the surface of the optics are mainly responsible for the low laser induced damage threshold ( LIDT ) . However during the operation of the large laser system the surface contaminations are known to lower the LIDT and shorten the lifetime of optics .

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Surface defects in ceramic bearing balls may significantly affect ball strength and reduce rolling contact fatigue lifetime .

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Electrochemical biosensors are effective tools for detecting glucose level to develop new materials for electrode surface modification and to enhance electrodes ' sensitivity and lifetime became an important study area .

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Surface quality has a close relation to gear 's performance and lifetime .

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The resistivity and surface roughness of Indium tin oxide ( ITO ) films will affect the light-emitting efficiency and lifetime of the organic light-emitting diodes ( OLED ) .

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After the ultraviolet irradiation it is observed that the surface recombination velocity and the sample resistance are increased the bulk minority lifetime is decreased .

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Surface modification has frequently been performed to improve the surface properties and lifetime of tube-like components . Ion implantation has been receiving much interest as an effective surface processing tool .

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Impacts on the throughflow matching surface metal temperature of the first grade static blade and also the average working lifetime of the high-temperature blade when the gas turbine is used for coal fuel gas is applied are analyzed .

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In the research field of new materials except the designing manufacturing and exploiting of new materials it is necessary that the key technologies ' researches of special forming surface dealing material property testing lifetime forecasting and invaliding analyses etc. to be done .

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Stainless steel is one of the mostly used materials to make servo valve and the precision of dimension quality of surface and the crossing hatches of the surface of the precision valve core has important influence on the reliability and lifetime for the servo valve .

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But surface defects on ceramic bearing balls can be brought at any manufacturing stage . Surface and subsurface defects significantly reduce the rolling contact fatigue lifetime .

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It was found that the role of the high order modes can be considerably minimized by using penetrating light sample of large size and low surface recombination velocity . The bulk lifetime of the filament can than be more accurately determined .

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The results show as follows : better quality of surface is obtained when 4.0J/mm 2 laser energy density is used . The thermal shock lifetime of the LR specimens is higher than that of plasma spraying ones .

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Surface work - hardening layer and residual press stresses can repress the formation of surface cracks and retard the propagating speed of cracks so that its contact fatigue lifetime can be greatly increased .

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Based on the adsorption of harmful gases on the cathode surface an equation about the relationship between the cathode lifetime and the pressure was deduced theoretically .

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The main surface passivation methods for silicon solar cells at present were compared according to effective lifetime of minority carrier in Si wafers reflection losses and spectral response of silicon solar cells . The advantages and disadvantages of these surface passivation technologies are analysed and estimated .

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The nonlinear effect of vertical cavity surface emitting lasers ( VCSELs ) is analyzed using the Volterra transfer function in analog modulation . The effects of the modulation frequency spontaneous emission factor and spontaneous emission lifetime on the third harmonic and third-order intermodulation distortions are investigated .

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This paper introduces the influence of the LEO environments on spacecraft surface materials and the evaluating technology of lifetime of spacecraft surface materials in LEO .

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Monocrystalline silicon wafers are the most widely used substrates in IC manufacturing fields . The surface layer quality directly affects the property the rate of finished products and the lifetime of IC device .

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The effects of surface thermal oxidation on the minority carrier lifetime of Czochralski ( CZ ) silicon wafers are investigated by photoconductive decay ( PCD ) method .

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The results showed that thermal brushing decomposition could easily lead to a cracking phenomenon on the surface of the active coating affecting the electrode catalytic activity and lifetime .

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Surface topography plays an important role in friction wear lubrication sealing mating painting and electroplating . It also has great influence on the whole working performance lifetime noise and vibration of components after assembling .

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Analysis of the physical characteristics of failure samples ' contact surface verify the failure mechanism and accelerated lifetime testing .

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