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A study on behavior of inorganic impurities in water tree
Author(s) -
Kumazawa Takao,
Nakagawa Wataru,
Tsurumaru Hidekazu
Publication year - 2005
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20198
Subject(s) - impurity , tree (set theory) , blank , analytical chemistry (journal) , materials science , natural abundance , chemistry , environmental chemistry , composite material , mathematics , chromatography , organic chemistry , mathematical analysis , mass spectrometry
It is well known that water tree propagation in XLPE cable is significantly influenced by inorganic impurities in water. Therefore, we investigated both changes in concentration and deviation of isotopic content of inorganic elements in XLPE samples by water tree experiments in a clean environment. The concentration of several kinds of elements (e.g., Li, Na, Mg, Al, K, Ca, Fe, Ni, Pb, and Bi) in water‐treed sample showed anomalous increase or decrease dependent on cation (K + , Na + , or Ag + ) in water solution compared with blank or original samples. Furthermore, the isotopic content of Zn deviated over 6% from natural abundance. These results suggest that water tree propagation is related to unknown physical or electro‐chemical reactions. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 153(2): 1–13, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20198