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Effect of Mechanical Constraints in Thin Ceramic LTCC / PZT Multilayers on the Polarization Behavior of the Embedded PZT
Author(s) -
Neumeister Peter,
Eßlinger Sophia,
Gebhardt Sylvia,
Schönecker Andreas,
Flössel Markus
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12218
Subject(s) - materials science , poling , polarization (electrochemistry) , sintering , ceramic , shrinkage , thermal expansion , composite material , thermal , optoelectronics , ferroelectricity , dielectric , chemistry , physics , meteorology
The effect of direct integration of PZT into LTCC by sintering on its polarization behavior is studied. Due to the typically small thermal expansion of PZT , compressive stresses are expected after cooling, which should promote poling. However, measurements show a strongly reduced remanent polarization compared to free PZT . Analysis of thermal expansion reveals that thermal shrinkage of the PZT is larger than that of LTCC . The impact of this finding on the poling behavior is simulated for the LTCC / PZT module, confirming the experimental observations and allowing for conclusions concerning the suitability of the PZT for integration into LTCC structures.