Dispersion of alumina powder in secondary butyl alcohol with a phosphate ester surfactant

Persistent Link:
http://hdl.handle.net/10150/277307
Title:
Dispersion of alumina powder in secondary butyl alcohol with a phosphate ester surfactant
Author:
Tarico, Daniel Joseph, 1965-
Issue Date:
1990
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Most ceramic articles are produced by first dispersing powders in a suitable liquid, forming the dispersion (by casting, molding, extrusion, etc.), drying and then firing the body to its final sintered state. It has been recognized that dispersion characteristics strongly affect the green body which in turn determines properties of fired ceramic, and recently, dispersion science has become quite important in the development of ceramics processes. In this thesis research, colloidal size alumina powder was dispersed in secondary butyl alcohol with a phosphate ester dispersant. Dispersions were produced in an attrition mill and evaluated by viscometry and sedimentation. These dispersions were "optimized" by adjusting surfactant concentration and milling time. Zeta potential measurements indicated stabilization was not purely electrostatic. It was noted that a small amount of water added to the dispersions dramatically affected dispersion rheology. With slight water addition high solids content slurries (40 vol. percent) could be produced with rheological characteristics desirable for casting. Solution conductivity measurements were made to provide insight into the possible mechanism by which water affects dispersion stability.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Materials Science.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Raghavan, Srini

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleDispersion of alumina powder in secondary butyl alcohol with a phosphate ester surfactanten_US
dc.creatorTarico, Daniel Joseph, 1965-en_US
dc.contributor.authorTarico, Daniel Joseph, 1965-en_US
dc.date.issued1990en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractMost ceramic articles are produced by first dispersing powders in a suitable liquid, forming the dispersion (by casting, molding, extrusion, etc.), drying and then firing the body to its final sintered state. It has been recognized that dispersion characteristics strongly affect the green body which in turn determines properties of fired ceramic, and recently, dispersion science has become quite important in the development of ceramics processes. In this thesis research, colloidal size alumina powder was dispersed in secondary butyl alcohol with a phosphate ester dispersant. Dispersions were produced in an attrition mill and evaluated by viscometry and sedimentation. These dispersions were "optimized" by adjusting surfactant concentration and milling time. Zeta potential measurements indicated stabilization was not purely electrostatic. It was noted that a small amount of water added to the dispersions dramatically affected dispersion rheology. With slight water addition high solids content slurries (40 vol. percent) could be produced with rheological characteristics desirable for casting. Solution conductivity measurements were made to provide insight into the possible mechanism by which water affects dispersion stability.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Materials Science.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRaghavan, Srinien_US
dc.identifier.proquest1340309en_US
dc.identifier.bibrecord.b26253197en_US
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