Granule size-dependent sinterability of aurivillius-based ceramics

Abstract

\({\text{B}\text{i}}_{4}{\text{T}\text{i}}_{3}{\text{O}}_{12}\), Sr\({\text{B}\text{i}}_{4}{\text{T}\text{i}}_{4}{\text{O}}_{15}\) and Sr\({\text{B}\text{i}}_{2}{\text{N}\text{b}}_{2}{\text{O}}_{9}\) compounds were synthesized by the solid-state reaction method. Phase purity was assessed using high-resolution and conventional X-ray techniques. The calcined powder was sieved through different mesh sizes before being compacted into pellets and then sintered. Ceramics arising from powder retained within the 50–75 μm range, when exposed to 1100 °C (\({\text{B}\text{i}}_{4}{\text{T}\text{i}}_{3}{\text{O}}_{12}\)) and 1200 °C (Sr\({\text{B}\text{i}}_{4}{\text{T}\text{i}}_{4}{\text{O}}_{15}\) and Sr\({\text{B}\text{i}}_{2}{\text{N}\text{b}}_{2}{\text{O}}_{9}\)) for 3 h, achieved a high densification leading to improved sintering process. Based on the dielectric constant and dielectric loss, granulometric separation might be an effective vector for enhancing dielectric properties.