Masasuke TAKATA
Hot Spot Phenomenon of Ceramics and its Application
Dr. Masasuke Takata
Japan Fine Ceramics Center£¨JFCC£©
Abstract
The present authors demonstrated that a local area of a GdBa2Cu3O7-¥ä (Gd-123) ceramic rod glows orange once a voltage exceeding a certain value is applied to the rod at room temperature [1]. The glowing area was named a hot spot. After the appearance of the hot spot, the current decreases with decreasing oxygen partial pressure (Po2) in ambient atmosphere, which acts as an oxygen sensor without the need for any heating system [2] .
References:
[1] T. Okamoto, B. Huybrechts and M. Takata, Jpn. J. Appl. Phys., 33 (1994) L1212. [2] M. Takata, Y. Noguchi, Y. Kurihara, T. Okamoto and B. Huybrechts, Bull. Mater. Sci., 22 (1999) 593.
Dr. Masasuke Takata
Japan Fine Ceramics Center£¨JFCC£©
Abstract
The present authors demonstrated that a local area of a GdBa2Cu3O7-¥ä (Gd-123) ceramic rod glows orange once a voltage exceeding a certain value is applied to the rod at room temperature [1]. The glowing area was named a hot spot. After the appearance of the hot spot, the current decreases with decreasing oxygen partial pressure (Po2) in ambient atmosphere, which acts as an oxygen sensor without the need for any heating system [2] .
References:
[1] T. Okamoto, B. Huybrechts and M. Takata, Jpn. J. Appl. Phys., 33 (1994) L1212. [2] M. Takata, Y. Noguchi, Y. Kurihara, T. Okamoto and B. Huybrechts, Bull. Mater. Sci., 22 (1999) 593.