Production of Si₃N₄/Glass Composites for LTCC Substrate by Aqueous Tape Casting Process

Abstract

In this work, Si3N4/glass sheets were prepared by aqueous tape casting, and the preparation process and properties of green and sintered tapes were discussed thoroughly. The effect of Si3N4 content on the rheological behavior of the slurries was investigated, and the results showed that the viscosity of the slurry increased with the solid loading and all the slurries exhibited shear‐thinning behavior within the entire range of shear rate. Green tapes were fabricated successfully by aqueous tape casting which have excellent properties such as uniform pore distribution, low porosity, and high bulk density. The sintered samples exhibited low shrinkage, and low dielectric constant and loss.

High Performance of Low‐Temperature‐Cofired Ceramic with Al2O3/BN Biphasic Ceramics Based on B2O3–Bi2O3–SiO2–ZnO Glass

“…Moreover, it is also feasible to prepare a multiceramics system to improve heat conduction which can achieve a synergistic effect. There are many other high-thermal-conductivity ceramic fillers used in LTCC, such as aluminum nitride, [7] silicon nitride, [8,9] silicon carbide, and boron nitride. [10] In recent years, BN has been considered as an attractive ceramic filler in thermal, insulated applications and other fields, [11][12][13] due to its remarkable microscopic properties, such as a high thermal conductivity (400 W m À1 K À1 ), [10] promising dielectric material, [14] and wide bandgap (5-6 eV).…”