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Evaporation of Silver during Cofiring with Barium Titanate
Author(s) -
Chen ChinYi,
Tuan WeiHsing
Publication year - 2000
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.1151-2916.2000.tb01451.x
Subject(s) - materials science , alloy , sintering , evaporation , melting point , dielectric , silver nitrate , cofiring , diffusion , barium titanate , chemical engineering , ceramic capacitor , metallurgy , composite material , capacitor , ceramic , chemistry , optoelectronics , physics , organic chemistry , quantum mechanics , voltage , engineering , thermodynamics , combustion
Silver and Ag‐Pd alloy are cofired with BaTiO 3 ‐based dielectrics during the manufacturing of capacitors. The diffusion of silver into BaTiO 3 during sintering is very slow. However, the vapor pressure of silver is high at temperatures greater than the melting point of silver (960°C). The effect of the evaporation of silver during the sintering with BaTiO 3 at 1200°, 1250°, and 1290°C is investigated in the present study. The silver vapor can transport through the pore channel of the dielectrics to a distance of a few hundred micrometers. The melting point of Ag‐Pd alloy is higher than that of silver; therefore, the transportation of silver vapor from Ag‐Pd alloy is hardly observed at temperatures >1200°C.