Binder distribution in ceramic greenware during thermolysis

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb09707.x· OSTI ID:5372497

Cima, M J; Lewis, J A; Devoe, A D ^[1]

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1. Massachusetts Inst. of Tech., Cambridge, MA (USA). Ceramics Processing Research Lab.

Capillary forces were shown to influence the distribution of polymer-plasticizer mixtures within ceramic green bodies during binder thermolysis. Isothermal thermogravimetric analysis was performed on tape-cast sheets of an alumina-poly(vinyl butyral)-dibutyl phthalate composite and direct observations were made of the binder distribution and pore growth after partial pyrolysis. This led to the investigation of a model system, an alumina-eicosane composite, by similar experimental techniques. The early stage of binder removal was found to be similar to the drying of particle beds in which capillary forces draw liquid into the smaller pores at the surface. The morphology of the binder distribution produced by these processes dictates which mass-transfer resistances may be controlling in binder burnout. A model is described that determines the length scale over which capillarity acts based on measurable physical parameters of the binder system and the packing of the ceramic particles.

• OSTI ID: 5372497
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:7; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERAMICS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMPOSITE MATERIALS
DATA
DECOMPOSITION
DISPERSIONS
EXPERIMENTAL DATA
GRAVIMETRIC ANALYSIS
INFORMATION
ISOTHERMAL PROCESSES
MATERIALS
MIXTURES
MORPHOLOGY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARAMETRIC ANALYSIS
POLYMERS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES