Title

Effect Of Temperature And Spin-Coating Cycles On Microstructure Evolution For Tb-Substituted Srceo3 Thin Membrane Films

Abstract

Ceramic oxides with perovskite structures (A2+B 4+O3) have been receiving considerable attention in the solid-state electrochemical systems, such as the development of solid oxide fuel cells (SOFCs), gas sensors, and hydrogen (H2) permeable membranes. The goal of this investigation is to process a terbium-doped strontium cerate (SrCe0.95Tb0.053-δ(SCT) thin membrane films by spin-coating using ethylene glycol-based polymeric precursor. Continuous and dense SrCe0.95Tb0.05O3-δ membrane thin films with neither pin-holes nor cracks are reported. The thicknesses of the membrane films are within the range of ∼ 200 nm - 2 μm. For a single spin-coating cycle, the membrane film (200 nm thick) appears to be discontinues. However, the membrane films are dens for multiple spin-coating cycles. The polymeric precursor and the microstructure of the SrCe0.95Tb 0.05O3-δ membranes are characterized using scanning electron microscopy (SEM), focused ion-beam (FIB) microscopy, and x-ray diffraction (XRD). This work reveals that good film quality with uniform texture and homogeneous structure can be produced via spin-coating technique as a function of spin-coating cycles and processing temperature. Also, surface morphology and grain size strongly depend on sintering temperature with even grain size distribution for each sintering temperature. The flexibility of the present process approach demonstrates the capability of precisely controlling the thickness of the ceramic membrane films within a sub-micron range.

Publication Date

12-1-2006

Publication Title

Ceramic Engineering and Science Proceedings

Volume

27

Issue

3

Number of Pages

285-294

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

33845926759 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33845926759

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