Chemical, structural, and mechanical properties of the LTCC tapes

Abstract

The chemical, structural and mechanical properties of six commercially available low temperature cofire ceramic (LTCC) systems were evaluated using X-ray diffraction, transmission electron microscopy, energy dispersive X-ray Spectroscopy (EDS), 3 and 4 point bend test, wetting angle and tensile testing (on unfired tape). Each of the systems (by manufacturer) was based on a different devitrifying glass-ceramic system, including Wollenstite, Anorthite and Celsian phases, plus expansion modifiers of alumina. For mechanical properties, both the fired strength and performance of the green, unfired tape were evaluated, including the viscoelastic response of unfired tape.