NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Effects of Polarity on Grain Boundary Migration in ZnO
Published
Author(s)
Jong S. Lee, Sheldon M. Wiederhorn
Abstract
Boundary migration of ZnO has been investigated using single crystals with defined crystallographic orientations. The migration rate of the basal C planes depended on the crystallographic polarity: Zn-terminated positive (0001)-planes. The migration in the non-polar directon was similar to that in the positive polarity direction. A ledge mechanism is suggested to be responsible for the grain boundary migration. These results explain the development of elongated grains in typical ZnO varistor ceramics.
Lee, J.
and Wiederhorn, S.
(2017),
Effects of Polarity on Grain Boundary Migration in ZnO, American Ceramic Society Bulletin
(Accessed October 15, 2025)