000044059 001__ 44059
000044059 005__ 20240711092248.0
000044059 0247_ $$2Handle$$a2128/315
000044059 0247_ $$2URI$$a315
000044059 037__ $$aPreJuSER-44059
000044059 0881_ $$aJuel-4171
000044059 088__ $$2JUEL$$aJuel-4171
000044059 1001_ $$0P:(DE-Juel1)VDB48296$$aOhnesorge, Mischa$$b0$$eCorresponding author$$uFZJ
000044059 245__ $$aUntersuchungen zur Hochtemperaturchemie quecksilberfreier Metallhalogenid-Entladungslampen mit keramischem Brenner
000044059 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2005
000044059 300__ $$a201 S.
000044059 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis
000044059 3367_ $$0PUB:(DE-HGF)3$$2PUB:(DE-HGF)$$aBook
000044059 3367_ $$02$$2EndNote$$aThesis
000044059 3367_ $$2DRIVER$$adoctoralThesis
000044059 3367_ $$2BibTeX$$aPHDTHESIS
000044059 3367_ $$2DataCite$$aOutput Types/Dissertation
000044059 3367_ $$2ORCID$$aDISSERTATION
000044059 4900_ $$0PERI:(DE-600)2414853-2$$819347$$aBerichte des Forschungszentrums Jülich$$v4171$$x0944-2952
000044059 502__ $$aAachen, Techn. Hochsch., Diss., 2005$$bDr. (FH)$$cTechn. Hochsch. Aachen$$d2005
000044059 500__ $$aRecord converted from VDB: 12.11.2012
000044059 520__ $$aThe development of mercury–free metal halide lamps requires a modification of the burner vessel design and of the metal halide filling, compared to mercury–containing lamp types. Metal halides as NaI, TlI, DyI$_{3}$ are added to discharge lamps in order to achieve a line–rich emission spectrum, resembling the sunlight. While evaporating, several chemical reactions occur among the inserted metal halides. Thus infecting the properties of light generation in a metal halide lamp. Further a corrosion attack on the burner vessel is observed due to chemical reactions of metal halides with the wall material Polycrystalline Alumina (PCA). In order to enhance the properties of light generation, it is aimed to describe the lamps in a thermodynamic model. Therefore statements on the light colour and the efficiency can be made. A complete thermodynamic data set of both gas and liquid phase reactions is required. Within the scope of the work in hand thermodynamic data for the formation of homo and hetero complexes as well as for chemical activities and excess enthalpies in metal halide systems were determined. A further reactive component is added to the chemical system of a metal halide lamp due to the mercury replacement Zn/ZnI$_{2}$. Interactions between Zn/ZnI$_{2}$ and metal halides cause the formation of new gas phase species, which were identified. Their influence on the properties of light generation and on corrosion was investigated. Therefore annealing experiments were conducted to elucidate the high–temperature corrosion of PCA. The observed corrosion phenomena were interpreted with respect to the principles of chemical transport. Model calculations using the beforehand determined data were accomplished to support the interpretation of the results, the annealing experiments obtained.
000044059 536__ $$0G:(DE-Juel1)FUEK248$$2G:(DE-HGF)$$aWerkstoffsysteme für Kraftwerke$$cE03$$x0
000044059 655_7 $$aHochschulschrift$$xDissertation (FH)
000044059 8564_ $$uhttps://juser.fz-juelich.de/record/44059/files/Juel_4171_Ohnesorge.pdf$$yOpenAccess
000044059 909CO $$ooai:juser.fz-juelich.de:44059$$pdnbdelivery$$pVDB$$pdriver$$popen_access$$popenaire
000044059 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000044059 9141_ $$y2005
000044059 9131_ $$0G:(DE-Juel1)FUEK248$$bEnergie$$kE03$$lRationelle Energieumwandlung$$vWerkstoffsysteme für Kraftwerke$$x0
000044059 9201_ $$0I:(DE-Juel1)VDB2$$d31.12.2006$$gIWV$$kIWV-2$$lWerkstoffstruktur und Eigenschaften$$x0
000044059 970__ $$aVDB:(DE-Juel1)62408
000044059 9801_ $$aFullTexts
000044059 980__ $$aVDB
000044059 980__ $$aJUWEL
000044059 980__ $$aConvertedRecord
000044059 980__ $$aphd
000044059 980__ $$aI:(DE-Juel1)IEK-2-20101013
000044059 980__ $$aUNRESTRICTED
000044059 980__ $$aFullTexts
000044059 981__ $$aI:(DE-Juel1)IMD-1-20101013
000044059 981__ $$aI:(DE-Juel1)IEK-2-20101013