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  • 1
    Electronic Resource
    Electronic Resource
    24. The cryopump system of the QQDDQ magnet spectrometer Big Karl
    Amsterdam : Elsevier
    Vacuum 28 (1978), S. 483 
    Details
    ISSN: 0042-207X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0042-207X(78)80026-8
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    24. The cryopump system of the QQDDQ magnet spectrometer Big Karl
    Amsterdam : Elsevier
    Vacuum 28 (1978), S. 483 
    Details
    ISSN: 0042-207X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0042-207X(78)80026-8
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The silicon lanthanide oxynitrides (1976)
    Springer
    Journal of materials science 11 (1976), S. 749-759 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new group of materials called the silicon lanthanide oxynitrides has been prepared by the reaction between Si3N4 and several oxides of the lanthanide series (La2O3, Sm2O3, Dy2O3, Er2O3, and Yb2O3). These oxides formed compounds of the type Si3N4 · R2O3 and R4Si2O7N2 (R being lanthanide). In addition La2O3 and Yb2O3 formed the compounds 2Si3N4 · La2O3 and Yb2Si3O5N2, respectively. Certain similarities in the unit cells of these compounds have been noted, and their structures are discussed in terms of similarity to known minerals. It is suggested that this group of materials contains a large number of compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01209463
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamic KIC and dynamic flexural strength in HS-130 Si3 N4 (1977)
    Springer
    Journal of materials science 12 (1977), S. 212-214 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00738490
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  • 5
    Electronic Resource
    Electronic Resource
    Phase relationships in the system Si3N4-Y2O3-SiO2 (1976)
    Springer
    Journal of materials science 11 (1976), S. 1305-1309 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Examination of compositions in the system Si3N4-Y2O3-SiO2 using sintered samples revealed the existence of two regions of melting and three silicon yttrium oxynitride phases. The regions of melting occur at ∼1600° C at high SiO2 concentrations (∼13 mol% Si3N4 + 19 mol% Y2O3 + 68 mol% SiO2) and at 1650° C at high Y2O3 concentrations (25 mol % Si3N4 + 75 mol % Y2O3). Two ternary phases 4Y2O3 ·SiO2 ·Si3N4 and 10Y2O3 ·9SiO2 ·Si3N4 and one binary phase Si3N4 ·Y2O3 were observed. The 4Y2O3 ·SiO2 ·Si3N4 phase has a monoclinic structure (a= 11.038 Å, b=10.076 Å, c=7.552 Å, β=108° 40′) and appears to be isostructural with silicates of the wohlerite cuspidine series. The 10Y2O3 ·9SiO2 ·Si3N4 phase has a hexagonal unit cell (a=7.598 Å c=4.908 Å). Features of the Si3N4-Y2O3-SiO2 systems are discussed in terms of the role of Y2O3 in the hot-pressing of Si3N4, and it is suggested that Y2O3 promotes a liquid-phase sintering process which incorporates dissolution and precipitation of Si3N4 at the solid-liquid interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00545151
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of traces of carbon dioxide in hydrogen chloride by gas chromatography (1979)
    Springer
    Chromatographia 12 (1979), S. 567-568 
    Details
    ISSN: 1612-1112
    Keywords: Determination of carbon dioxide in hydrogen chloride ; Enrichment ; Headspace technique ; ppm level
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simple method has been developed for analysis of carbon dioxide in hydrogen chloride at the 5 to 100 ppm level. After enrichment by the headspace technique the CO2 was determined on a Porapak R column, with hydrogen carrier gas and a thermal conductivity detector. The detection limit was found to be about 5 ppm of carbon dioxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265476
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  • 7
    Electronic Resource
    Electronic Resource
    Gas chromatographic analysis of traces of hydrogen sulfide in hydrogen (1980)
    Springer
    Chromatographia 13 (1980), S. 513-514 
    Details
    ISSN: 1612-1112
    Keywords: Hydrogen sulfide in hydrogen ; Enrichment ; Gas loop ; ppm level
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simple gas chromatographic method has been developed for analysis of hydrogen sulfide in hydrogen at the 0.5 to 100 ppm level. After enriching the traces of hydrogen sulfide by absorption in a gas loop packed with the chosen column support at 77 K it was determined by using a Chromosorb G column with silicone 550 and phthalic anhydride as liquid phases, hydrogen as carrier gas and a thermal conductivity detector. The detection limit was found to be about 0.5 ppm of hydrogen sulfide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261623
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Bestimmung von Methylchlorsilanen in Chlorsilanen mit Hilfe eines Systems Gas-Chromatograph und Massenspektrometer (1980)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 303 (1980), S. 394-396 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Dimethylchlorsilan, Methyldichlorsilan und Trimethylchlorsilan in Chlorsilanen ; Chromatographie, Gas/Massenspektrometrie ; feste Masseneinstellung, ppm-Gebiet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Verbindungen (CH3)2SiHCl, CH3SiHCl2 und (CH3)3SiCl wurden in SiHCl3/SiCl4-Gemischen gas-chromatographisch analysiert, wobei ein Massenspektrometer mit fester Masseneinstellung als Detektor eingesetzt wurde. Die Nachweisgrenze liegt bei ca. 1 Gew.-ppm für diese Verbindungen.
    Notes: Summary The compounds (CH3)2SiHCl, CH3SiHCl2 and (CH3)3SiCl were analyzed in SiHCl3/SiCl4 mixtures by gas chromatography using a mass spectrometer being focused on definite peaks as detector. The detection limit was found to be about 1 ppm (wt) of these compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00469998
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  • 9
    Electronic Resource
    Electronic Resource
    Gas-chromatographische Analyse von Chlorkohlenwasserstoffen in Siliciumhalogenverbindungen (1979)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 295 (1979), S. 266-268 
    Details
    ISSN: 1618-2650
    Keywords: Best. von trans-Dichloräthen, 1,1-Dichloräthan, 1,1,1-Trichloräthan, Trichloräthylen in Siliciumtetrachlorid ; Chromatographie, Gas ; Anreicherung, Dampfraum, ppm-Gebiet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Chlorkohlenwasserstoffe trans-Dichloräthen, 1,1-Dichloräthan, 1,1,1-Trichloräthan und Trichloräthylen werden nach Abtrennung des SiCl4 mittels Dampfraumtechnik angereichert und gaschromatographisch analysiert. Die Nachweisgrenze liegt bei ca. 1 Gew.-ppm für diese Verbindungen.
    Notes: Summary The chlorinated hydrocarbons trans-dichloroethene, 1,1-dichloroethane, 1,1,1-trichloroethane and trichloroethylene are enriched after separation of tetrachlorosilane with the aid of head-space technique and are determined by gas-chromatography. The detection limit is found to be about 1 ppm (wt.) of these compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481490
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  • 10
    Electronic Resource
    Electronic Resource
    Bestimmungen von Chlorkohlenwasserstoffen in Siliciumhalogeniden mit Hilfe von zwei gas-chromatographischen Verfahren und deren methodischer Vergleich (1980)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 303 (1980), S. 14-17 
    Details
    ISSN: 1618-2650
    Keywords: Best. von trans-Dichlorethen, cis-Dichlorethen und 1, 1, 1-Trichlorethan in Trichlorsilan ; Chromatographie, Gas/Massenspektrometrie ; Anreicherung über Dampfraum, ppm-Gebiet, Methodenvergleich
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Zur Bestimmung der Chlorkohlenwasserstoffe trans-Dichlorethen, cis-Dichlorethen und 1,1,1-Trichlorethan wurden 2 gas-chromatographische Verfahren entwickelt. Bei Verfahren I werden die Verunreinigungen nach Abtrennung der Matrix SiHCl3 durch KHF2 mittels Dampfraumtechnik angereichert und gas-chromatographisch mit einem Flammenionisationsdetektor bestimmt. Bei Verfahren II werden die Verbindungen direkt gas-chromatographisch erfaßt, wobei ein Massenspektrometer mit fester Masseneinstellung als Detektor eingesetzt wird. Die Nachweisgrenze liegt bei ca. 0,1 Gew.-ppm für diese Verbindungen bei beiden Verfahren. Ein Vergleich beider Methoden wurde durchgeführt.
    Notes: Summary Two gas-chromatographic methods are developed for the determination of the chlorinated hydrocarbons trans-dichloroethene, cis-dichloroethene and 1,1,1-trichloroethane. In method I the impurities are enriched after separation of SiHCl3 by KHF2 with the aid of headspace technique and are determined by gas-chromatography with a flame-ionisation detector. In method II the compounds are analyzed directly by gas-chromatography using a mass spectrometer with focussed peaks as detector. The detection limit was found to be about 0.1 ppm (wt.) of the compounds for these two methods. Measurements of some investigated samples are compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00474299
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