Masters Theses

Sagnik Saha

Abstract

"New compositions of low temperature black glasses were developed that are suitable as frits for enameling soda-lime silicate (S-L-S) glass substrates. Zinc iron phosphate glasses are of interest for this application because they possess dilatometric low softening points (under 600ºC) and have coefficients of thermal expansion that are compatible with S-L-S glass (in the range 90-110x10⁻⁷/ºC). The development of compositions with excellent chemical durability, particularly in acidic conditions, is also desired. Compositional modification were made to the (Na₂O+K₂O)·ZnO·MnO·Fe₂O₃·P₂O₅ glass system using design of experiments. The compositional boundaries used in the design were based on earlier work at Missouri S&T. The Na₂O:K₂O molar ratio was fixed at 1:1 and the total alkali content was treated as a single compositional variable. Twenty glasses with compositions of ZnO ( up to 20 mol%), MnO ( up to 20 mol%), combined Na₂O and K₂O ( up to 20 mol%), Fe₂O₃ ( 10-30 mol%) and P₂O₅ ( 40-60 mol%) were prepared and characterized. From this initial study, several additional compositions were prepared that had the desired properties for enameling soda-lime silicate glasses. These glass compositions were used for screen printing and firing onto soda lime silicate glasses. The screen printed films were fired at 680ºC for 8 minutes. Glasses of the system (50-x)ZnO.xMnO.50P₂O₅ were prepared with x=0, 10, 20, 30, 40 and glasses of the system (50-x)ZnO.xMn₂O₃.50P₂O₅ were made with x=0,10,20. The thermal properties and chemical durability were determined and UV-Vis spectroscopy was used to characterize these glasses"--Abstract, page iii.

Advisor(s)

Brow, Richard K.

Committee Member(s)

Miller, F. Scott, 1956-
Day, D. E.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Materials Science and Engineering

Sponsor(s)

Ferro Corporation

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2010

Pagination

ix, 58 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2010 Signik Saha, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Enamel and enamelingGlass-ceramics

Thesis Number

T 9753

Print OCLC #

723164783

Electronic OCLC #

658044549

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