Far Eastern Federal University, Vladivostok, Russia:

I. G. Trukhina, Master's Degree Student (Chair of Materials Science and Material Technology)
Yu. N. Mansurov, Professor, Head of a Chair of Materials Science and Material Technology, e-mail: yulbarsmans@gmail.com
V. P. Reva, Assistant Professor (Chair of Materials Science and Material Technology)
V. A. Pimenov, Assistant (Chair of Materials Science and Material Technology)

The aim of the research was to investigate structure and morphology of samples of composite materials based on nanotubes, containing TiO₂ – ZrO₂ – SiO₂, and to analyze dependence of their structure on components ratio and annealing temperature. Template method was used to obtain composite nanomaterials, representing nanostructured TiO₂ – ZrO₂ – SiO₂ oxide tubes with diameter from 1 to 3 μm and length from 10 to 300 μm. Nanotubes are formed of nanocrystallites with the size from 10 to 25 nm. Thickness of the nanotubes’ walls is about 300 nm. The TiO₂ – ZrO₂ – SiO₂ composites, obtained by the sol-gel method at carbonic fibrous template with contents of ZrO₂ up to 5.6% and annealing temperature from 550 to 850 ^oС, are formed of nanoparticles with an anatase structured lattice. Composites contain 1.0–23.4% of SiO₂ which have no effect on crystal structure of nanoparticles, but which is presented as an amorphous phase, covering them. It was defined that controllable variation of ZrO₂ content in the new TiO₂ – ZrO₂ – SiO₂ composite as well as an annealing temperature allows to synthesize materials with different morphology and crystal structure of nanoparticles, comprising these materials. It was defined that the maximum allowable content of ZrO₂ with respect to the total mass of a composite, which provides the balance between obtaining small anatase nanoparticles and keeping the microtubes themselves integrated during annealing at the temperatures from 550 to 800 ^оС, amounts to 5–6%.

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3. Nanotubes and Nanosheets: Functionalization and Applications of Boron Nitride and Other Nanomaterials. Editor: Ying (Ian) Chen. Boca Raton, Florida, USA : CRC Press, 2015. pp. 451–452.
4. Mansurov Yu. N. Trekh- i chetyrekhkomponentnye diagrammy sostoyaniya na osnove alyuminiya (Three-and four-component state diagrams on the basis of aluminium). Tashkent : Spectrumscope, 2011. 104 p.
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