Masters Theses

Abstract

"The zinc iron phosphate system is investigated for use as an enamel for the automotive industry. The thermal properties and chemical durability of the glass-forming region are measured. Compositions are selected based on their oxygen to phosphorus (O/P) ratio at values of 3.5, 3.25, and 3.0. Substitutions of SnO, CuO, Li2O, Na2O, K2O for ZnO and B2O3 for Fe2O3 are used to alter the properties of the base glasses to achieve a particular range of Tg, CTE and durability. The 3.25 and 3.0 O/P glasses are found have too low a durability to be used as an enamel. Within the 3.5 O/P glasses, high iron content produces too high a Tg to be useable. Of the lower iron glasses, the alkali modifiers are able to reduce Tg sufficiently without sacrificing CTE or durability. Li2O increases the tendency of the glass to crystallize so that it does not re-melt and flow. A combination of Na2O and K2O provides the correct range of thermal properties and durability and SEM images show a consistent wetting of the substrate glass. The final glass composition chosen was 5Na2O · 5Na2O · 20.2ZnO · 21.8 Fe2O3 · 48 P2O5. The wetting experiments determined an optimum enameling treatment of 650°C for 5 min"--Abstract, page iii.

Advisor(s)

Brow, Richard K.

Committee Member(s)

Fahrenholtz, William
O'Keefe, Matthew

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 2003

Pagination

ix, 69 pages

Note about bibliography

Includes bibliographical references (pages 67-68).

Rights

© 2003 Kristine Ann Miller, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Library of Congress Subject Headings

Glass-ceramics
Enamel and enameling

Thesis Number

T 8402

Print OCLC #

55222576

Electronic OCLC #

1079420285

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b5088736~S5

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