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Effect of Water Vapor on Dielectric Loss in MgO
Author(s) -
JOHNSON HOWARD B.,
JOHNSON OWEN W.,
CUTLER IVAN B.
Publication year - 1966
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.1151-2916.1966.tb13292.x
Subject(s) - water vapor , dielectric , dielectric loss , conductivity , ion , partial pressure , porosity , materials science , absorption of water , absorption (acoustics) , analytical chemistry (journal) , mineralogy , vapour pressure of water , hydroxide , chemistry , inorganic chemistry , composite material , environmental chemistry , organic chemistry , oxygen , optoelectronics
A dielectric loss study of porous MgO indicates that H 2 O absorption on MgO probably leads to the formation of surface defects as well as hydroxide ions. The ac conductivity, σ ac followed the equation σ ac =σ 1 + KP H2O 0.27 from 550° to 800°C when the water partial pressure was varied between 7 × 10 −5 and 3 × 10 −2 atm.