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Carbonation reaction of (Ca, Mg)O protective layer on plasma display panel
Author(s) -
Motoyama Yasushi,
Kato Daisuke,
Saito Nobuo,
Seki Masahiko
Publication year - 2013
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.148
Subject(s) - carbonation , plasma display , power consumption , annealing (glass) , plasma , materials science , layer (electronics) , chemical engineering , analytical chemistry (journal) , chemistry , composite material , electrode , environmental chemistry , power (physics) , thermodynamics , physics , quantum mechanics , engineering
We have been applying a low discharge voltage (Ca, Mg)O protective layer to plasma display panels to reduce their power consumption. However, (Ca, Mg)O is highly reactive with CO 2 , and the resulting carbonate formation during high‐temperature panel sealing in air impairs the low discharge voltage characteristic. We investigated the mechanism of the carbonation reaction that occurs on a (Ca, Mg)O surface during annealing in air at 450°C and found that the CO 2 diffuses through the formed CaCO 3 layer and that a (Ca, Mg)O + CO 2 → CaCO 3 + MgO reaction then occurs. This carbonation reaction evidently stops when the growing MgO finally forms a layer at all boundaries between the CaCO 3 and (Ca, Mg)O regions.