Preparation, characterization and properties of alumina-lithium aluminium borosilicate glass based LTCC tapes
Induja, I. J.; Varma, M. R.; Sebastian, M. T. (2017-10-31)
Induja, I.J., Varma, M.R. & Sebastian, M.T. J Mater Sci: Mater Electron (2017) 28: 14655. https://doi.org/10.1007/s10854-017-7330-7
© Springer Science+Business Media, LLC 2017. This is a post-peer-review, pre-copyedit version of an article published in Journal of Materials Science: Materials in Electronics Vol. 28 Issue 19. The final authenticated version is available online at: https://doi.org/10.1007/s10854-017-7330-7.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2019052016185
Tiivistelmä
Abstract
A new low temperature cofired ceramic (LTCC) tape based on 40 wt% Al₂O₃–60 wt% LABS glass (40Li₂CO₃:10Al₂O₃:30B₂O₃:20SiO₂) has been developed. The dielectric properties of the LABS glass are studied. The structural, dielectric, thermal as well as the chemical compatibility with Ag electrode of the bulk Al₂O₃–LABS sintered at 800 °C are investigated. The room temperature thermal conductivity and CTE of the bulk are 3.80 Wm⁻¹ K⁻¹ and 5.1 ppm/°C respectively. The Al₂O₃–LABS slurry which has a pseudoplastic nature is made into thin sheets using tape casting technique. The green tape has a surface roughness of 293 nm and tensile strength 0.2 MPa. The Al₂O₃–LABS based LTCC tapes are sintered at 775 °C has εᵣ of 4.70 with tanδ 0.005 and τε of +412 ppm/°C at 5 GHz. The results suggest that the Al₂O₃–LABS based LTCC tapes is a possible candidate for LTCC device applications.
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