Microstructure evolution and phase transition in Er doped BaTiO3 ceramics
Апстракт
The Er doped BaTiO3 ceramics, with different Er2O3 content, ranging from 0.01 to 1.0 wt% Er, were investigated regarding their microstructural and dielectric characteristics in this paper. Doped BaTiO3 were prepared by using conventional method of solid state sintering at 1380 °C for four hours. SEM analysis of Er/BaTiO3 doped ceramics showed that in samples doped with a rareearth ions low level, the grain size ranged from 20-40 μm, while with the higher dopant concentration the abnormal grain growth is inhibited and the grain size ranged between 2-10μm. Dielectric measurements were carried out as a function of temperature up to180°C at different frequencies. The low doped samples sintered at 1380 °C, display the high value of dielectric permittivity at room temperature, 2160 for 0.01 Er/BaTiO3. A nearly flat permittivity-response was obtained in specimens with higher additive content. Using a Curie-Weiss low and modified Curie-Weiss low the Curie constant C, Curie temperature Tc and a... critical exponent of nonlinearity γ were calculated. The Curie temperature of doped samples were ranged from 126 to 130 °C. The Curie constant for all series of samples decrease with increase of dopant concentration and the lowest values were mesured from samples doped with 0.01 wt% of aditive. The obtained value of γ pointed out that the specimens have almost sharp phase transition.
Кључне речи:
BaTiO3 / barium titanate / Er doping / microstructureИзвор:
Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade, 2013, 20-20Издавач:
- Belgrade : Serbian Ceramic Society
Напомена:
- II Serbian Ceramic Society Conference - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
Колекције
Институција/група
VinčaTY - CONF AU - Paunović, Vesna AU - Mitić, Vojislav V. AU - Miljković, Miroslav AU - Živković, Ljiljana PY - 2013 UR - http://dais.sanu.ac.rs/123456789/412 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7425 AB - The Er doped BaTiO3 ceramics, with different Er2O3 content, ranging from 0.01 to 1.0 wt% Er, were investigated regarding their microstructural and dielectric characteristics in this paper. Doped BaTiO3 were prepared by using conventional method of solid state sintering at 1380 °C for four hours. SEM analysis of Er/BaTiO3 doped ceramics showed that in samples doped with a rareearth ions low level, the grain size ranged from 20-40 μm, while with the higher dopant concentration the abnormal grain growth is inhibited and the grain size ranged between 2-10μm. Dielectric measurements were carried out as a function of temperature up to180°C at different frequencies. The low doped samples sintered at 1380 °C, display the high value of dielectric permittivity at room temperature, 2160 for 0.01 Er/BaTiO3. A nearly flat permittivity-response was obtained in specimens with higher additive content. Using a Curie-Weiss low and modified Curie-Weiss low the Curie constant C, Curie temperature Tc and a critical exponent of nonlinearity γ were calculated. The Curie temperature of doped samples were ranged from 126 to 130 °C. The Curie constant for all series of samples decrease with increase of dopant concentration and the lowest values were mesured from samples doped with 0.01 wt% of aditive. The obtained value of γ pointed out that the specimens have almost sharp phase transition. PB - Belgrade : Serbian Ceramic Society C3 - Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade T1 - Microstructure evolution and phase transition in Er doped BaTiO3 ceramics SP - 20 EP - 20 UR - https://hdl.handle.net/21.15107/rcub_vinar_7425 ER -
@conference{ author = "Paunović, Vesna and Mitić, Vojislav V. and Miljković, Miroslav and Živković, Ljiljana", year = "2013", abstract = "The Er doped BaTiO3 ceramics, with different Er2O3 content, ranging from 0.01 to 1.0 wt% Er, were investigated regarding their microstructural and dielectric characteristics in this paper. Doped BaTiO3 were prepared by using conventional method of solid state sintering at 1380 °C for four hours. SEM analysis of Er/BaTiO3 doped ceramics showed that in samples doped with a rareearth ions low level, the grain size ranged from 20-40 μm, while with the higher dopant concentration the abnormal grain growth is inhibited and the grain size ranged between 2-10μm. Dielectric measurements were carried out as a function of temperature up to180°C at different frequencies. The low doped samples sintered at 1380 °C, display the high value of dielectric permittivity at room temperature, 2160 for 0.01 Er/BaTiO3. A nearly flat permittivity-response was obtained in specimens with higher additive content. Using a Curie-Weiss low and modified Curie-Weiss low the Curie constant C, Curie temperature Tc and a critical exponent of nonlinearity γ were calculated. The Curie temperature of doped samples were ranged from 126 to 130 °C. The Curie constant for all series of samples decrease with increase of dopant concentration and the lowest values were mesured from samples doped with 0.01 wt% of aditive. The obtained value of γ pointed out that the specimens have almost sharp phase transition.", publisher = "Belgrade : Serbian Ceramic Society", journal = "Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade", title = "Microstructure evolution and phase transition in Er doped BaTiO3 ceramics", pages = "20-20", url = "https://hdl.handle.net/21.15107/rcub_vinar_7425" }
Paunović, V., Mitić, V. V., Miljković, M.,& Živković, L.. (2013). Microstructure evolution and phase transition in Er doped BaTiO3 ceramics. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade Belgrade : Serbian Ceramic Society., 20-20. https://hdl.handle.net/21.15107/rcub_vinar_7425
Paunović V, Mitić VV, Miljković M, Živković L. Microstructure evolution and phase transition in Er doped BaTiO3 ceramics. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade. 2013;:20-20. https://hdl.handle.net/21.15107/rcub_vinar_7425 .
Paunović, Vesna, Mitić, Vojislav V., Miljković, Miroslav, Živković, Ljiljana, "Microstructure evolution and phase transition in Er doped BaTiO3 ceramics" in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade (2013):20-20, https://hdl.handle.net/21.15107/rcub_vinar_7425 .