Effects Associated with Confined Geometry in Nanocomposites Based on Mesoporous 2D-SBA-15 and 3D-SBA-15 Matrices Containing Sodium Nitrite Nanoparticles
- Авторлар: Naberezhnov A.A.1, Stukova E.V.2, Alekseeva O.A.3, Novikova S.A.4, Franz A.5
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Мекемелер:
- Ioffe Institute
- Amur State University
- Peter the Great St. Petersburg Polytechnic University
- Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences
- Helmholtz Zentrum Berlin
- Шығарылым: Том 64, № 12 (2019)
- Беттер: 1866-1871
- Бөлім: Electrophysics
- URL: https://journals.rcsi.science/1063-7842/article/view/204953
- DOI: https://doi.org/10.1134/S106378421912020X
- ID: 204953
Дәйексөз келтіру
Аннотация
Temperature dependences of the ferroelectric order parameter for nanostructured sodium nitrite under heating and cooling were obtained by analyzing the temperature evolution of diffraction spectra of neutron scattering by composites obtained by introducing sodium nitrite into pores of mesoporous 2D-SBA-15 (the average pore diameter is 69(4) Å) and 3D-SBA-15 (94(5) Å) matrices. It was demonstrated that the phase transition to the paraelectric phase in the process of heating occurs at TC = 433 ± 1 K in both nanocomposite materials. It was found that these sizes decrease at approaching to the ferroelectric phase transition point on heating. Temperature hysteresis (~15–20 K) in the temperature dependence of the order parameter between the heating and cooling regimes was revealed.
Авторлар туралы
A. Naberezhnov
Ioffe Institute
Хат алмасуға жауапты Автор.
Email: alex.nabereznov@mail.ioffe.ru
Ресей, St. Petersburg, 194021
E. Stukova
Amur State University
Email: alex.nabereznov@mail.ioffe.ru
Ресей, Blagoveshchensk, 675027
O. Alekseeva
Peter the Great St. Petersburg Polytechnic University
Email: alex.nabereznov@mail.ioffe.ru
Ресей, St. Petersburg, 195251
S. Novikova
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences
Email: alex.nabereznov@mail.ioffe.ru
Ресей, Krasnoyarsk, 660036
A. Franz
Helmholtz Zentrum Berlin
Email: alex.nabereznov@mail.ioffe.ru
Германия, Berlin, 14109
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