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Effect of DC voltage on the microstructure and electrical properties of stabilized-zirconia

โœ Scribed by Xin Guo

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
953 KB
Volume
99
Category
Article
ISSN
0167-2738

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โœฆ Synopsis

Y O and Al O codoped ZrO specimens were treated by a DC voltage of 8 V at 6008C in air. During the treatment, 2 3 2 3 2 electrons were injected from the cathode into the ZrO , thus colour centers were formed. After the treatment, no structure 2 and valence state changes were detected by XRD and XPS, and no obvious microstructure and composition change were observed by TEM and EPMA. However, the bulk resistance was found to greatly increase, which is considered to be the result of the formation of colour centers. The grain-boundary resistance was found to greatly decrease, and this phenomenon may be due to a reduced space-charge potential and the reduced size and amount of the amorphous grain-boundary phase.

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