LTCC tapes based on Al2O3–BBSZ glass with improved thermal conductivity. Issue 10 (December 2015)

• Record Type: Journal Article
• Authors: Induja, I.J.; Abhilash, P.; Arun, S.; Surendran, K.P.; Sebastian, M.T.
• Is Part Of: Ceramics international. Volume 41:Issue 10(2015)Part A
• Page Start: 13572
• Page End: 13581
• Publication Date: 2015-12
• Subjects: A. Tape casting -- C. Thermal conductivity -- D. Al2O3 -- E. Substrates; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.07.152
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A novel low temperature co-fired ceramic (LTCC) composition consisting of 40 wt% Al2 O3 –60 wt% BBSZ (35Bi2 O3 :32ZnO:27B2 O3 :6SiO2 ) fireable at 850 °C has been developed. The XRD study of the sintered composite shows the presence of Bi24 Si2 O40 and ZnAl2 O4 secondary phases. The bulk samples sintered at 900 °C has dielectric constant ( ε r ) of 11.3 and loss tangent (tan δ ) of 0.001 at 1 MHz. Tapes of the composite have been casted on Mylar ® film and the green tape has a surface roughness of 299 nm and tensile strength of 0.1 MPa. Upon sintering the tapes showed an ε r of 10.9, tan δ of 0.009 and temperature coefficient of dielectric constant ( τ ε ) of 487 ppm/°C at 5 GHz, which are suitable for practical hybrid device applications.