M.I. Samoylovich - Dr. Sc. (Phys.-Math.), Professor, Head of Department, Central Research Technological Institute «Technomash» (Moscow). E-mail: samoylovich@cnititm.ru A.F. Belyanin - Dr. Sc. (Eng.), Professor, Main Research Scientist, Central Research Technological Institute «Technomash» (Moscow). E-mail: belyanin@cnititm.ru A.S. Bagdasarian - Dr. Sc. (Eng.), Professor, Main Research Scientist, Kotel\'nikov IRE of RAS (Moscow). E-mail: bagdassarian@mail.ru S.A. Bagdasarian - Ph. D. (Eng.), General Director, JSC «Scientific Engineering Center «Technological Developments of Telecommunication and Radio Frequency Identification» (Moscow)

The conditions for the formation of nanocomposites based on the basis of lattice packings SiO2 nanospheres (opal matrices) with included crystallites of lead titanates (PbTiO3 and PbTi3O7) and terbium manganite (TbMn2O5) in interspherical nanospacing are considered. For the formation of nanocomposites used samples opal matrices with dimensions of single-domain regions ≥0,1 mm3; diameter SiO2 nanos-pheres was ~260 nm. Obtained nanocomposites volume >2 cm3 in filling >20% of interspherical nanospacing PbTiO3, PbTi3O7 crystallites size of 16-36 nm and TbMn2O5 - 26-34 nm. Using X ray diffraction and Raman spectroscopy studied composition and structural stability when heated to 550°C nanocomposites, which allowed the identification of a local phase transition with change of the space group. The dependence of the composition of synthesized materials on the conditions of their preparation are submitted.

 

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