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Water‐Induced Degradation of Barium Titanate Ceramics Studied by Electrochemical Hydrogen Charging
Author(s) -
Chen Wan Ping,
Jiang Xiang Ping,
Wang Yu,
Peng Zhi,
Chan Helen Lai Wah
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03366.x
Subject(s) - barium titanate , hydrogen , electrolysis of water , materials science , electrolysis , degradation (telecommunications) , electrochemistry , ceramic , cathode , anode , chemical engineering , hydrogen production , inorganic chemistry , electrode , metallurgy , chemistry , electronic engineering , organic chemistry , electrolyte , engineering
Water‐induced degradation of barium titanate (BTO) ceramics has been investigated using electrochemical hydrogen charging, in which the silver electrodes of BTO ceramic specimens are made cathodes in a 0.01 M NaOH solution to evolve hydrogen by electrolysis of water. After 80 h of treatment, the resistance of BTO decreases by ∼3 orders of magnitude, and the dielectric loss obviously increases. The degradation can be explained by the reduction reaction of atomic hydrogen with BTO. Hydrogen acts as a donor in BTO, and electrons are formed by the reduction. It is proposed that the reduction reaction of atomic hydrogen at ambient temperature by electrolysis of water is an important origin for degradation of BTO‐based ceramic devices.