DocumentCode
2526844
Title
SrTiO3 capacitor-varistor ceramics exhibiting surface effect
Author
Jianying, Li ; Shengtao, Li ; Fuyi, Liu ; Yan, Zhuang
Author_Institution
State Key Lab. of Electr. Insulation for Power Equipment, Xi´´an Jiaotong Univ., China
Volume
2
fYear
2000
fDate
2000
Firstpage
974
Abstract
The electrical properties and microstructure of SrTiO3 capacitor-varistor ceramics sintered in different atmospheres are investigated. The results show that samples sintered in a strong reducing atmosphere of 25%N2+75%H2 and heat-treated in air have a low-resistive core with a high-resistive surface layer around it, which we name the surface effect. XPS results reveal that the surface effect results from an oxygen diffusion process during heat treatment
Keywords
X-ray photoelectron spectra; ceramics; heat treatment; reduction (chemical); scanning electron microscopy; self-diffusion; semiconductor materials; sintering; strontium compounds; surface conductivity; N2-H2; O diffusion process; SEM; SrTiO3; SrTiO3 capacitor-varistor ceramics; XPS results; electrical properties; heat treatment; high-resistive surface layer; low-resistive core; microstructure; sintering atmosphere; strong reducing atmosphere; surface effect; Atmosphere; Atmospheric measurements; Ceramics; Grain size; Lattices; Semiconductivity; Surface cracks; Temperature; Varistors; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location
Xi´an
Print_ISBN
0-7803-5459-1
Type
conf
DOI
10.1109/ICPADM.2000.876393
Filename
876393
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