Oxygen diffusion and defect structure in PTCR-barium titanate

Hajime Haneda; Junzo Tanaka; Takamasa Ishigaki

doi:10.1117/12.237181

26 April 1996 Oxygen diffusion and defect structure in PTCR-barium titanate

Hajime Haneda, Junzo Tanaka, Takamasa Ishigaki

Proceedings Volume 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials; (1996) https://doi.org/10.1117/12.237181
Event: 3rd International Conference on Intelligent Materials, 1996, Lyon, France

Abstract

The diffusivities of oxygen along the grain boundary in the PTCR-samples were greater than those in non-PTCR samples. The grain boundary diffusion characteristics drastically changed at the oxygen partial pressure of appearing the PTCR effect. On the other hand, the volume diffusivities of oxygen ions in both samples have the same value. These results lead that the structural change at grain boundary in polycrystalline barium titanate occurred at the oxidizing prossece and enhanced oxygen grain boundary diffusion. The origin of the barrier layer of the PTCR effect is considered to be same.

Citation Download Citation

Hajime Haneda, Junzo Tanaka, and Takamasa Ishigaki "Oxygen diffusion and defect structure in PTCR-barium titanate", Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); https://doi.org/10.1117/12.237181

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available