Phase Transitions in Ferroelectric KNO3/Al2O3 Nanocomposites

Autor:	S. V. Baryshnikov, A. Yu. Milinskiy
Rok vydání:	2021
Předmět:	chemistry.chemical_compound Structural phase Phase transition Range (particle radiation) Nanocomposite Materials science chemistry Phase (matter) Oxide Analytical chemistry General Physics and Astronomy Potassium nitrate Ferroelectricity
Zdroj:	Russian Physics Journal. 64:268-275
ISSN:	1573-9228 1064-8887
Popis:	The temperature dependences of the linear dielectric permittivity e′ and the third harmonic coefficient γ3ω for nanocomposites obtained by embedding a KNO3 melt into the pores of Al2O3 oxide films with diameters of 330, 190, and 100 nm are investigated. The measurements were carried out in the heating and cooling modes in the range from room temperature to 463 K. It was found that the structural phase transition from phase II to phase I of potassium nitrate in Al2O3 films shifts towards higher temperatures as compared to bulk KNO3. For KNO3, the ferroelectric phase appears in the pores of 190 and 100 nm both upon heating and upon cooling.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::20c19d7e980fa7bc4bb532c8c14ea920 https://doi.org/10.1007/s11182-021-02325-2 Zobrazit plný text záznamu Plný text ve formátu PDF