Peculiar properties of phase transitions in Na0.5Bi0.5TiO3−0.06BaTiO3 lead-free relaxor ferroelectrics seen via acoustic emission
| Autor: | E. Mojaev, Michael Roth, Evgeniy Dul'kin, Jenia Tiagunova |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Range (particle radiation) Phase transition Materials science Condensed matter physics 02 engineering and technology Dielectric Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Acoustic emission visual_art 0103 physical sciences visual_art.visual_art_medium Intermediate temperature General Materials Science Ceramic 0210 nano-technology Burns temperature |
| Zdroj: | Functional Materials Letters. 10:1750048 |
| ISSN: | 1793-7213 1793-6047 |
| DOI: | 10.1142/s1793604717500485 |
| Popis: | Na[Formula: see text]Bi[Formula: see text]TiO3-0.06BaTiO3 relaxor ferroelectrics (RFEs) ceramic samples were investigated by means of dielectric and acoustic emission methods in the temperature range of 70–350[Formula: see text]C and in dependence on frequency. Dielectric curve exhibits two anomalies: strongly dispersive the local maximum, within 130–180[Formula: see text]C and slightly dispersive the smeared high-temperature maximum within 300–310[Formula: see text]C. Acoustic emission exhibits the five groups of bursts: near 123[Formula: see text]C, 150–180[Formula: see text]C, near 225[Formula: see text]C, 300–310[Formula: see text]C and 327[Formula: see text]C. The first and third groups of acoustic emission bursts correspond to phase transitions of R[Formula: see text]c-P[Formula: see text]bm phases coexisting in this temperature, range, while the fourth and fifth groups of acoustic emission bursts correspond to P[Formula: see text]bm-P[Formula: see text] /mbm-Pm[Formula: see text] m phase transitions. The second group of acoustic emission bursts corresponds to strongly dispersive local maximum at which no phase transition has been proved in Na[Formula: see text]Bi[Formula: see text]TiO3-0.06BaTiO3. The existence and the location of the intermediate temperature, [Formula: see text], in Na[Formula: see text]Bi[Formula: see text]TiO3-0.06BaTiO3 compound are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|