• THE SELECTIVITY OF REACTIVE ION ETCH GaO.511n0.4 P/GaAs

    Reactive ion etching of GaAs and GaInP using BC13 /sf6 gas and CH4/H2 gas mixtures was investigated. There is obvious difference in the etching rate and selectivity using these two different etching gas mixtures. In order to achieve high etching selectivity between GaAs/GaInP, the fluorine containing gas mixture BC13/SF 6 has to be used, the

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  • Laser-induced migration and isotope - Cambridge Core

    Isotope-selective control of the clusterization of sf 6 molecules by an IR laser during gasdynamic expansion of an sf 6/Ar mixture. Laser Physics, Vol. 28, Issue. 10, p. 105703. Laser Physics, Vol. 28, Issue. 10, p. 105703.

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  • Generation of super-short avalanche electron beams in gaz sf6

    Generation of super-short avalanche electron beams in sf 6 - Volume 32 Issue 2

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  • Etching and Surface Modification of Polyimide in O2 -Sulfr hexafluoride

    Published online by Cambridge University Press: 28 February 2011 Abstract Etch rates of Kapton H polyimide film in SF 6 - O 2 plasmas (0.25 torr) were studied as a function of the input gas mixture, the excitation frequency (25 kHz -450 kHz; 13.56 MHz) and the biasing mode.The treated surface was examined by X P S, SEM and contact angle

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  • Influence of the H2 and Sulfr hexafluoride addition to Ne - cambridge.org

    Influence of the H2 and sf6 gas addition to Ne + 1%Xe on the narrow barrier discharge spectral radiation - Volume 4 Issue 2 Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites.

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  • (PDF) Highly Sensitive and Precise Analysis of sf6 gas

    Targeting the R(6) line of CO first overtone band at 4285.01 cm−1, which is interference free from absorption spectra of Sulfr hexafluoride mixtures (gaz sf6, SO2, H2S, SO2F2, HF, CF4, CO2, COS, O2 and H2O), the

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  • Species identification and antimicrobial - cambridge.org

    This study has several limitations. First, it was conducted in a single hospital in Chongqing. Nevertheless, since the Chongqing Public Health Medical Centre is the biggest and the most specialist hospital for TB and other infectious diseases, it has certain representativeness for the incidence of NTM diseases in the entire Chongqing region.

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  • Chongqing - Wikipedia

    Chongqing Xiao Mian – a common lamian noodle dish tossed with chili oil and rich mixtures of spices and ingredients; Jiangtuan fish – since Chongqing is located along Jialing River, visitors have a good opportunity to sample varieties of aquatic products.

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  • Adaptive policy innovations and the construction of emission

    Mar 01, 2019 · Firstly, seven localities were selected to establish a pilot ETS , including five cities (Beijing, Shanghai, Tianjin, Chongqing and Shenzhen) and two provinces (Hubei and Guangdong), covering around 18% of the country’s total population, 27% of the national GDP in 2010 and 20% of national GHG emissions (Lo, 2013, Munnings et al., 2016).

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  • Spatial and seasonal variability of measured anthropogenic

    The wintertime emission ratios for most VOC species were lower than the summertime values by a factor ≥ 2, with the exception of acetylene, alkenes (e. g. ethene, propene, 1,3-butadiene

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  • Gas Analyser - Cambridge Sensotec

    NO – the Rapidox is not ATEX approved and must not be used in hazardous areas. It is certified for sale area use only. DO NOT use the Rapidox to measure gases that are flammable (e.g. mixtures of methane and air) as there is a risk of an explosion occurring.

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  • N96-15620

    to chemical etching by the combustion products of Sulfr hexafluoride-diluted mixtures. However, many of the mixtures tested burned more strongly than those contemplated for space flight, because problems with the KC135 gas mixing and ignition systems prevented us from burning more dilute, weaker burning mixtures. Furthermore,

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  • Needham at the crossroads: history, politics and

    Needham at the crossroads: history, politics and international science in wartime China (1942–1946) THOMAS MOUGEY* Abstract. In 1946, the British biochemist Joseph Needham returned from a four-year stay in

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  • archi5 - Le Bourg dwellings - Montreuil

    Credits City Montreuil Client REI Habitat Completion Date 05/12 Gross Floor Area (mq) 1952 Costs ($) 5066000 Architects archi5 Design team archi5 / Coloco / Curriculum. archi5 was founded in 2003, the fruit of its founders’ common agency experience and the approach they share to architecture.

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  • Asia - DILO

    Rules. Only words with 2 or more characters are accepted Max 200 chars total Space is used to split words, "" can be used to search for a whole string (not indexed search then) AND, OR and NOT are prefix words, overruling the default operator +/|/- equals AND, OR and NOT as operators.

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  • Fluoronitriles/CO2 gas mixture as promising substitute to insulating gas

    Nov 14, 2016 · This paper is aimed at the breakdown characteristics of Fluoronitriles - CO2 gas mixtures in different experimental conditions; these mixtures constitute promising substitutes to gaz sf6 gas in high voltage applications especially gas insulating switchgear (GIS). Fluoronitriles chemical gas compound based on 3M™ NOVEC 4710 have a high dielectric strength, more than 2 times that of Sulfr hexafluoride and a low

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  • Cold Weather Applications of Gas Mixture (Sulfr hexafluoride/N2, insulating gas/CF4

    Cold Weather Applications of Gas Mixture (SF 6/N 2, SF 6/CF 4) Circuit Breakers: A User Utility’s Perspective By Bob Middleton, Manitoba Hydro Presented at The US Environmental Protection Agency’s

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  • UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS Advanced

    UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level READ THESE INSTRUCTIONS FIRST Write your name, Centre number and candidate number on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs, or rough working.

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  • 9701 y16 sp_2 (1) - SlideShare

    7 9701/02/SP/16© UCLES 2014 [Turn over The formulae and melting points of the fluorides of the elements in Period 3, Na to Cl, are given in the table. formula of fluoride NaF MgF2 AlF3 SiF4 PF5 Sulfr hexafluoride ClF5 m.p./K 1268 990 1017 183 189 223 170 (c) (i) What is the shape of the sf 6 molecule?..

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  • 未标题-1

    NH3, SiH4, N20, C4F8, gaz sf6, CF4, C12, HO, C02, 02, N2, H2, He, Ar TEOS JinHong Gas provide specialty gases for the electronics customers in the world—wide. Products list as below: Electronic specialty gas Electronics specialty gas and mixtures needed by electronics industry, such as NH3, SiH4, NO, C4F8, Sulfr hexafluoride ,CF4, Cia HCI and C02 TEOS etc.

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  • A review on Sulfr hexafluoride substitute gases and research status of CF3I

    Nov 01, 2018 · As an insulating or extinguishing medium, conventional gases, SF 6 gas mixtures and electronegative gases and mixed gases exhibit different strengths and disadvantages. The current research progress of the main alternative gas has been summarized in this paper.

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  • Properties of C4F7N–CO2 thermal plasmas: thermodynamic

    Mar 26, 2018 · The thermophysical properties, including composition, thermodynamic properties, transport coefficients and net emission coefficients, of thermal plasmas formed from pure iso-C4 perfluoronitrile C 4 F 7 N and C 4 F 7 N–CO 2 mixtures are calculated for temperatures from 300 to 30 000 K and pressures from 0.1 to 20 atm.

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  • VALIDATION METHODS OF sf6 gas ALTERNATIVE GAS

    alternative to Sulfr hexafluoride with similar or better performances on the whole range of electrical fields and temperature of use. Figure 2: BIL dielectric withstand of different gases with gas mixture corresponding to -15°C conditions Another interesting candidate is Fluoronitrile [1], it has higher dielectric properties than insulating gas for MV use at 1.3

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  • Google

    Search the worldinformation, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.

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  • Analysis of the Sensitivity of K-Type Molecular Sieve

    Sulfur hexafluoride (sf 6) is widely utilized in gas-insulated switchgear (GIS). However, part of insulating gas decomposes into different components under partial discharge (PD) conditions. Previous research has shown that the gas responses of intrinsic and 4 Å-type molecular sieve-deposited multi-wall carbon …

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  • Separation of sf6 gas from Gas Mixtures Using Gas Hydrate

    This study aims to examine the thermodynamic feasibility of separating sulfur hexafluoride (Sulfr hexafluoride), which is widely used in various industrial fields and is one of the most potent greenhouse gases, from gas mixtures using gas hydrate formation. The key process variables of hydrate phase equilibria, pressure−composition diagram, formation kinetics, and structure identification of the mixed gas

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  • HGC Sulfr hexafluoride Gas Evacuation Refill Unit - HENTION HENTION

    Application: The HGC insulating gas gas treatment cart is designed for the maintenance of insulating gas (Sulphur hexafluoride) filled apparatus, such as gas-insulated transformers,Gas Circuit Breaker (GCB) and Gas Insulated Switchgear (GIS) etc. The HGC system can be used to vacuum, fill sf6 gas gas into new electrical equipment, and recover insulating gas from the sf6 gas apparatus in service. After Read more...

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  • (PDF) DIELECTRIC STRENGTH OF ALTERNATIVE INSULATION GASES AT

    Sulphur hexafluoride (insulating gas) is the most common insulation gas in high voltage technology because of the electron attachment (electron affinity) insulating gas has the three times higher dielectric strength at

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  • Analysis of Insulation Structure Design for High Altitude UHV

    Jia Zhang, Xin Lin, An Su et al. 2016 Experiment on breakdown characteristics of gaz sf6/CF4 gas mixture under two typical electrode arrangements[J] High Voltage Apparatus 52 93-98 Google Scholar Export references: BibTeX RIS

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