Paper Title:
Preferential Orientation Dependent Mechanical and Electrical Properties in Naβ-Alumina Ceramics
  Abstract

Nab-alumina is a two- dimensional ionic conductor in which conducting planes of Na+ ion are separated by insulating spinel block layers. For practical use, Nab- alumina needs not only high ionic conductivity but also mechanical reliability. Therefore, we prepared preferentially oriented Nab-alumina ceramics by hot pressing and evaluated the ionic conductivity and mechanical strength. The ionic conductivity perpendicular to the c-axis-oriented plane was five times higher than that parallel to c-axis. From the preferentially oriented Nab-alumina ceramics three types of test pieces were cut for a three-point bending test. In one type of test piece, the longest side was parallel to the hot-pressing direction, while the longest sides were perpendicular to that direction in the other types of test pieces. The latter test pieces showed mechanical strength 1.5 times that of the former.

  Info
Periodical
Edited by
Masaru Miyayama, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki
Pages
147-150
DOI
10.4028/www.scientific.net/KEM.301.147
Citation
A. Kishimoto, K. Shimokawa, "Preferential Orientation Dependent Mechanical and Electrical Properties in Naβ-Alumina Ceramics", Key Engineering Materials, Vol. 301, pp. 147-150, 2006
Online since
January 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: X.D. Li, Larry Wang, Tetsuhiko Onda, T. Akao, Motozo Hayakawa
Abstract:Centrifugal casting method was used to fabricate composites with graded structures in alumina-zirconia system. The composition profiles of...
293
Authors: Eniko Volceanov, Ştefania Motoc, Adrian Volceanov, Rodica M. Neagu, Cristian Coman
2283
Authors: Won Seung Cho, Yeon Chul Yoo, Chin Myung Whang, Nam Hee Cho, Woon Suk Hwang, Jun Gyu Kim, Young Jae Kwon
Abstract:Porous alumina bodies were successfully prepared by spark plasma sintering of alumina powders with different amounts of graphite, and by...
1056
Authors: Jie Liu, Long Quan Shao, Yuan Fu Yi, Bin Deng, Wei Wei Zhang, Li Min Dong, Hong Chen Liu, Jie Mo Tian, Ning Wen
Abstract:Objective: To study the effects of presintering temperature and temperature rise speed on the physical and mechanical properties of...
549
Authors: Bao Yu Du, Bo Zhao, Tie Lin Duan
Chapter 6: Mechanical Design and Manufacture Technology (2)
Abstract:Physical and mechanical properties as well as microstructure of zirconia toughened alumina ceramics with different zirconia content were...
485