Reactive intermediate phase cold sintering in strontium titanate.

ABSTRACT: Dense (>96% theoretical) strontium titanate ceramics were fabricated at 950 °C (conventional sintering temperature > 1400 °C) using a reactive intermediate phase cold sintering process. An aqueous solution of SrCl₂ mixed with TiO₂ nanoparticles was added to SrTiO₃ powders and pressed at 180 °C to obtain a highly compacted green body. During the post-press heating step at 950 °C, the TiO₂ and SrCl₂ create in-filling micro-reactions around each grain resulting in dense (>96%) SrTiO₃ ceramics. Nano- and micron-sized starting powders were used, demonstrating that this reactive intermediate phase cold sintering route can densify a wide range of starting powder sizes, as it not reliant on an amorphous-to-crystalline precipitation

SUBMITTER: Boston R 

PROVIDER: S-EPMC9080801 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature