Stiffening of nanoscale anatase Ti[subscript 0.9]Zr[subscript 0.1]O[subscript 2] upon multiple compression cycles

Journal Article · Tue Oct 07 04:00:00 EDT 2008 · J. Phys. Chem. Solids

DOI:https://doi.org/10.1016/j.jpcs.2008.04.022· OSTI ID:1006865

Holbig, E; Dubrovinsky, L; Miyajima, N; Swamy, V; Wirth, R; Prakapenka, V; Kuznetsov, A ^[1]

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1. Bayreuth

The compression behavior of nanoscale Zr-doped anatase was studied by means of a diamond anvil cell experiment with alternating cycles of compression and decompression in the stability field of anatase (up to 13 GPa). We found that multiple cycles of compression lead to stiffening of the material: Precompressed samples of nanoanatase Ti{sub 0.9}Zr{sub 0.1}O{sub 2} have a higher bulk modulus (K{sub 0} = 249(9) and 266(6) GPa) compared with the sample when compressed for the first time (K{sub 0} = 211(7) GPa). Upon compression, the crystallite size remains the same and the crystalline areas are free of defects. After the experiment, the crystallites are surrounded by amorphous rims, confirming the theoretical prediction by Pischedda et al. [Ultrastability and enhanced stiffness of similar to 6 nm TiO{sub 2} nanoanatase and eventual pressure-induced disorder on the nanometer scale, Phys. Rev. Let. 96 (2006) 035509] for nanoscale anatase, but yielding much lower pressures (12 GPa) for the onset of partial amorphization.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: USDOE
• OSTI ID: 1006865
• Journal Information: J. Phys. Chem. Solids, Journal Name: J. Phys. Chem. Solids Journal Issue: (9) ; 09, 2008 Vol. 69; ISSN 0022-3697; ISSN JPCSAW
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
COMPRESSION
DEFECTS
DOPED MATERIALS
NANOSTRUCTURES
ORDER-DISORDER TRANSFORMATIONS
STABILITY
TITANIUM OXIDES
ZIRCONIUM OXIDES