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Bonding of Zirconia and Lanthanum Chromite by Co‐firing
Author(s) -
Smith David S.,
Sayer Michael,
Roeder P.,
Smith A.,
Odier P.
Publication year - 1989
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.1151-2916.1989.tb06121.x
Subject(s) - chromite , cubic zirconia , lanthanum , materials science , sintering , ceramic , impurity , metallurgy , phase (matter) , shrinkage , talc , mineralogy , composite material , inorganic chemistry , chemistry , organic chemistry
Zirconia has been bonded to lanthanum chromite by co‐firing. The ceramic bodies are joined during sintering with an applied pressure of less than 0.1 MPa. This technique facilitates the formation of a junction phase which involves the impurity silica. During firing at 1500°C, silica is driven from zirconia and lanthanum chromite to the junction region, where it combines with calcia as well as other components to form a liquid phase. The liquid phase relaxes stresses due to differential shrinkage of the two bodies and, on cooling, solidifies, thus bonding lanthanum chromite to zirconia.