Manufacturing a high performance film of CaO-B2O3-SiO2 glass-ceramic powder with surface modification for LTCC application

The present work was oriented to develop a high-performance film for LTCC application through using a kind of silane coupling agent (SCA) to modify the CBS (CaO-B2O3-SiO2) glass-ceramic powders in tape casting process. The coupling mechanism of the silane coupling agent interacting with the powders was illustrated in detail, and the optimum amount of additions was determined by the infrared transmittance and contact angle experiment. The rheological properties of suspensions, the compactness and tensile breaking strength of the green tape were texted by using a number of quantitative and qualitative instruments. Furthermore, when the green tapes sintered at 820 °C, the sintering characteristics and microwave properties of sintered body with different SCA additions was also analyzed. Based on the experimental results, it revealed that the powders modified by SCA with 1.5 wt% additions could induce the most excellent performance of film, with the density at 1.57 g/cm3 and the tensile strength at 2.57 MPa, possessing the highest density and best microwave properties of sintered body: the density of sintered body was 2.48 g/cm3, the dielectric constant and dielectric loss was εr = 5.93, tanδ=8 × 10−4 at 12 Hz.