Masters Theses

Abstract

”An acetate-based polymeric precursor for producing yttrium-stabilized zirconia (YSZ) has been developed. The precursor can be produced under ambient conditions and contains only yttrium and zirconium cations. Dense, crack-free films were fabricated with this precursor on alumina substrates at a rate of 60 nm per deposition, producing polycrystalline YSZ at temperatures as low as 600°C. By varying the annealing conditions, the grain size of these films can range from 20 nm with a regular grain size distribution at 700°C, to 300 nm with a bimodal grain size distribution at 1200°C"--Abstract, page 2.

"Solid-oxide fuel cells (SOFC) use yttrium-stabilized zirconia (YSZ) as the electrolyte. Minimizing the thickness of this electrolyte is crucial for reducing the operating temperature of SOFC’s from 1000°C to below 700°C. In an attempt to fabricate YSZ films between 2 and 5 pm thick, an acetate-based polymeric precursor was combined with colloidal YSZ to produce a composite precursor. This composite precursor was spin-coated onto polished alumina substrates, where the surface coverage was measured by scanning electron microscopy. The films were found to have a regular porosity, caused by the flocculation of the powder, triggered by one of the major constituents of the precursor, yttrium acetate. This effect could not be overcome, making this system unsuitable for producing dense YSZ films"--Abstract, page 33.

Advisor(s)

Huebner, Wayne

Committee Member(s)

Anderson, H. U. (Harlan U.)
Van-De-Mark, Michael R.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 2002

Journal article titles appearing in thesis/dissertation

  • A Novel Yttrium-Stabilized Zirconia Polymeric Precursor for the Production of Thin Films
  • A Colloidal Precursor for the Production of Thick Yttrium-Stabilized Zirconia Films

Pagination

viii, 59 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2002 Roger Marshall Smith, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Library of Congress Subject Headings

Thin films
Thick films
Yttrium
Zirconium oxide

Thesis Number

T 8126

Print OCLC #

52626849

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=b4971507~S5

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