High Pressure-XRD study on pure and Fe-doped SnO2 nanoparticles

SERGIO FERRARI; D. SANTAMARIA; C. POPESCU; DANIEL ERRANDONEA; R. VILAPLANA; F. D. SACCONE; FLORENCIA GRINBLAT; A. SEGURA; L. G. PAMPILLO

Campinas

Encuentro; XV Brazilian Materials Research Society meeting; 2016

We performed high pressure X-ray Diffraction experiments on nanoparticles of pure tin dioxide (particle size 30nm) and Fedoped tin dioxide (particle size 18nm). The structural behavior of pure tin dioxide (SnO 2 ) nanoparticles was studied up to 32 GPa whilethe Fe-doped tin dioxide (formula: Fe 0.1 Sn 0.9 O 2 ) nanoparticles were studied up to 19 GPa with X-ray diffraction (synchrotron source). Wehave found that both samples present a structural phase transition from the tetragonal rutile-type (space group P4 2 /mnm) at ambientpressure to an orthorhombic CaCl 2 -type structure (space group Pnnm) at ~13GPa. Additionally, pure SnO 2 presented a cubic phasetransition at ~25 GPa . The cell constants, as well as the bulk modulus and bulk modulus first derivative, are reported.