000137010 001__ 137010
000137010 005__ 20240708132825.0
000137010 037__ $$aFZJ-2013-03496
000137010 041__ $$aEnglish
000137010 1001_ $$0P:(DE-Juel1)129641$$aMücke, Robert$$b0$$eCorresponding author$$ufzj
000137010 1112_ $$a13th International Conference of the European Ceramic Society$$cLimoges$$d2013-06-23 - 2013-06-27$$gECerS XIII$$wFrance
000137010 245__ $$aGreen film characterisation by optical profilometry
000137010 260__ $$c2013
000137010 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1376647156_26802$$xAfter Call
000137010 3367_ $$033$$2EndNote$$aConference Paper
000137010 3367_ $$2DataCite$$aOther
000137010 3367_ $$2ORCID$$aLECTURE_SPEECH
000137010 3367_ $$2DRIVER$$aconferenceObject
000137010 3367_ $$2BibTeX$$aINPROCEEDINGS
000137010 520__ $$aPacking density, roughness, and drying stresses of green ceramic layers determine the mechanical and micro structural properties after final sintering. Utilising laser profilometry, the green density of screen printed layers (20-50 µm) were determined with an accuracy of 0.1-0.2% theoretical density. Several effects that affect the accuracy of the results were taken into account and are discussed (e.g. waviness of substrate, penetration depth of the laser beam, deformation of the substrate due to drying stresses). The method can be applied on all layer materials and thick-film deposition methods with a dried thickness of 10 µm or larger that either allow a removal of the applied layer or do not deform the substrate during the coating process. In a case study, the influence of ink parameters (grain size 0.1..0.5 µm, solid content, binder, and dispersing agent) on the green density was studied systematically for electrolyte screen printing inks (8 mol.-% yttria stabilised zirconia = 8YSZ) typically used in solid oxide fuel cell applications. Additional characterisation of the drying stresses by substrate bending measurements and the roughness, together with rheological data, allowed further interpretation of the data and an understanding of how varying ink components influence the state of the dried layer. It could be shown that a minimal binder content is required to achieve acceptable green densities whereas the solid content in well de-agglomerated inks has only little influence. Ethyl cellulose binder was found both to act as a dispersant (especially for larger grain sizes) and to exert high tensile stresses on the particles, thereby contributing to a higher green density. Drying stresses up to 10 MPa were measured for a binder with a short chain length and 2 MPa for a binder with longer chain length. Pre-calcination of the powder and the presence of dispersants, in particular for small grain sizes, significantly increased the film densities. Combing the favourable parameters, the highest green density achieved was 63% theoretical density.
000137010 536__ $$0G:(DE-HGF)POF2-122$$a122 - Power Plants (POF2-122)$$cPOF2-122$$fPOF II$$x0
000137010 536__ $$0G:(DE-Juel1)SOFC-20140602$$aSOFC - Solid Oxide Fuel Cell (SOFC-20140602)$$cSOFC-20140602$$fSOFC$$x1
000137010 7001_ $$0P:(DE-Juel1)129636$$aMenzler, Norbert H.$$b1$$ufzj
000137010 7001_ $$0P:(DE-Juel1)129670$$aVaßen, Robert$$b2$$ufzj
000137010 7001_ $$0P:(DE-Juel1)129594$$aBuchkremer, Hans Peter$$b3$$ufzj
000137010 909CO $$ooai:juser.fz-juelich.de:137010$$pVDB
000137010 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129641$$aForschungszentrum Jülich GmbH$$b0$$kFZJ
000137010 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129636$$aForschungszentrum Jülich GmbH$$b1$$kFZJ
000137010 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129670$$aForschungszentrum Jülich GmbH$$b2$$kFZJ
000137010 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129594$$aForschungszentrum Jülich GmbH$$b3$$kFZJ
000137010 9131_ $$0G:(DE-HGF)POF2-122$$1G:(DE-HGF)POF2-120$$2G:(DE-HGF)POF2-100$$3G:(DE-HGF)POF2$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lRationelle Energieumwandlung und -nutzung$$vPower Plants$$x0
000137010 9141_ $$y2013
000137010 920__ $$lno
000137010 9201_ $$0I:(DE-Juel1)IEK-1-20101013$$kIEK-1$$lWerkstoffsynthese und Herstellungsverfahren$$x0
000137010 980__ $$aconf
000137010 980__ $$aVDB
000137010 980__ $$aUNRESTRICTED
000137010 980__ $$aI:(DE-Juel1)IEK-1-20101013
000137010 981__ $$aI:(DE-Juel1)IMD-2-20101013