Investigation into the interactions between Bi2O3-doped ZnO and AgPd electrode

✍ Scribed by Shu-Ting Kuo; Wei-Hsing Tuan; Yeh-Wu Lao; Chung-Kai Wen; Huey-Ru Chen; Hsin-Yi Lee

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 836 KB
• Volume: 28
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2008.03.036

✦ Synopsis

Bi 2 O 3 -doped ZnO multilayer specimens with inner AgPd electrodes are prepared. The interactions between the Bi 2 O 3 dopants and AgPd electrodes at elevated temperatures are investigated. It is found that during co-firing, two oxide phases, PdO and PdBi 2 O 4 , are formed at 400 • C and 600 • C, respectively, using synchrotron X-ray analysis. The PdBi 2 O 4 phase remains in the multilayer specimens after co-firing. Despite the formation of PdBi 2 O 4 , the Pd content in the AgPd electrodes increases with increasing firing temperature. In contrast, a decrease in Ag content in the electrodes at elevated temperatures is apparent; this is mainly due to the vaporization of Ag. The present study shows that after firing at 1200 • C for 1 h, the inner AgPd electrodes experience degradation due to the formation of PdBi 2 O 4 and the loss of Ag.