nvestigation of Vapor Phase Thin Film Deposition and Interfacial Reaction in Bismuth Oxide Glass/YSZ System
Date Issued
2007
Date
2007
Author(s)
Chen, Yu-Ju
DOI
en-US
Abstract
A complient sealing glass-ceramic with the following properties is needed for the preparation of solid oxide fuel cell (SOFC), The design of the sealing material to have a glass transition temperature (Tg) slightly lower than operation temperature (To), good match of the coefficient of thermal expansion (CTE) with SOFC components, chemically inert at To, non-electrical conductive and good wetting for gas tight is tough and a great challenge in engineering aspects. This study included tow major subjects. One is used ion-beam sputtering deposition (IBSD), sputtered oxide or metal targets on various ZrO2 substrates, which included Si (100) wafer and porous NiO/YSZ composite disk. The other is preparation of two sealing glasses, Pb- and Bi-Zn-Si-B-oxides, and analyze the crystallization behaviors have been conducted. X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM) with energy dispersive spectroscopy (EDS) were employed to study the best performance is contact with YSZ at 600-650oC for at least 10 hr, but the microstructural and phase evolution of the films and glasses. The results show that porous YSZ thin films with columnar crystalline structure on NiO/YSZ substrate or in amorphous state on Si wafer were observed. One Pb-free glass (B4 glass) has the microcracks induced by crystallization and CTE mismatch may play a negative role for the sealing. The discussion on the influence by different targets, substrates, phase transformation. Electric conductivity will be discussed.
Subjects
燃料
電池
薄膜
封裝玻璃
無鉛玻璃
Bi-Zn-Si-B 氧化物玻璃
相變化
SOFC
thin film
sealing glass
Pb-free
glass ceramics
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R93527005-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):b1206d70b91432fbfbaa5e3daf61a870