Synthesis and thermal stability of ZrO₂@SiO₂ core-shell submicron particles.

ABSTRACT: ZrO₂@SiO₂ core-shell submicron particles are promising candidates for the development of advanced optical materials. Here, submicron zirconia particles were synthesized using a modified sol-gel method and pre-calcined at 400 °C. Silica shells were grown on these particles (average size: ∼270 nm) with well-defined thicknesses (26 to 61 nm) using a seeded-growth Stöber approach. To study the thermal stability of bare ZrO₂ cores and ZrO₂@SiO₂ core-shell particles they were calcined at 450 to 1200 °C. After heat treatments, the particles were characterized by SEM, TEM, STEM, cross-sectional EDX mapping, and XRD. The non-encapsulated, bare ZrO₂ particles predominantly transitioned to the tetragonal phase after pre-calcination at

SUBMITTER: Finsel M 

PROVIDER: S-EPMC9070609 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature