TiO2 and Al2O3 based ceramic/glass composites were prepared by a liquid phase sintering method using lead borosilicate (PBS) glass with a deformation temperature of about 627 degrees C. The non-reactive liquid phase sintering (NLPS) was conducted in both systems. there was no crystallization in the TiO2/PBS glass composite and although the crystallization of the anorthite-type phase occurred in the Al2O3/PBS glass composite, this phase might be crystallized from the PBS glass. The linear shrinkage behavior could be interpreted as one stage sintering for both systems. The dielectric constant (epsilon(r)) of the TiO2/PBS glass composite was about 30, implying that an application to filters may therefore he shown to be appropriate. The temperature coefficient of the resonant frequency (tau(f)) however, was +135 ppm/K and in improvement is necessary for the application to LTCC materials. The dielectric constant (epsilon(r)) of the Al2O3/PBS glass composite was about 10 and an application to substrates may be proper.

Keywords: LTCC; Ceramic/glass; TiO2; Al2O3; Lead borosilicate