Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics
Апстракт
La/Mn codoped BaTiO3 with different La2O3 content, ranging from 0.1 to 5.0 at% La, was investigated regarding their microstructural and dielectric characteristics. The content of 0.05 at% Mn was constant in all investigated samples. The samples were sintered at 1320°C and 1350°C for two hours. Microstructural studies were done using SEM and EDS analysis. The fine-grained microstructure was obtained even for low content of La. The appearance of secondary abnormal grains with serrated features along grain boundaries was observed in 1.0 at% La-BaTiO3 sintered at 1350°C. Nearly flat permittivity-temperature response was obtained in specimens with 2.0 and 5.0 at% La. Using the modified Curie-Weiss law a critical exponent γ and C' were calculated. The obtained values of γ pointed out the diffuse phase transformation in heavily doped BaTiO3 and great departure from the Curie-Weiss law for low doped ceramics.
Кључне речи:
BaTiO3 / sintering / microstructures / ferroelectric propertiesИзвор:
Processing and Application of Ceramics, 2010, 4, 4, 253-258Издавач:
- Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
Институција/група
Poljoprivredni fakultetTY - JOUR AU - Paunović, Vesna AU - Mitić, Vojislav AU - Pavlović, Vladimir AU - Miljković, Miroslav AU - Živković, Ljiljana PY - 2010 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/2350 AB - La/Mn codoped BaTiO3 with different La2O3 content, ranging from 0.1 to 5.0 at% La, was investigated regarding their microstructural and dielectric characteristics. The content of 0.05 at% Mn was constant in all investigated samples. The samples were sintered at 1320°C and 1350°C for two hours. Microstructural studies were done using SEM and EDS analysis. The fine-grained microstructure was obtained even for low content of La. The appearance of secondary abnormal grains with serrated features along grain boundaries was observed in 1.0 at% La-BaTiO3 sintered at 1350°C. Nearly flat permittivity-temperature response was obtained in specimens with 2.0 and 5.0 at% La. Using the modified Curie-Weiss law a critical exponent γ and C' were calculated. The obtained values of γ pointed out the diffuse phase transformation in heavily doped BaTiO3 and great departure from the Curie-Weiss law for low doped ceramics. PB - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad T2 - Processing and Application of Ceramics T1 - Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics EP - 258 IS - 4 SP - 253 VL - 4 UR - https://hdl.handle.net/21.15107/rcub_agrospace_2350 ER -
@article{ author = "Paunović, Vesna and Mitić, Vojislav and Pavlović, Vladimir and Miljković, Miroslav and Živković, Ljiljana", year = "2010", abstract = "La/Mn codoped BaTiO3 with different La2O3 content, ranging from 0.1 to 5.0 at% La, was investigated regarding their microstructural and dielectric characteristics. The content of 0.05 at% Mn was constant in all investigated samples. The samples were sintered at 1320°C and 1350°C for two hours. Microstructural studies were done using SEM and EDS analysis. The fine-grained microstructure was obtained even for low content of La. The appearance of secondary abnormal grains with serrated features along grain boundaries was observed in 1.0 at% La-BaTiO3 sintered at 1350°C. Nearly flat permittivity-temperature response was obtained in specimens with 2.0 and 5.0 at% La. Using the modified Curie-Weiss law a critical exponent γ and C' were calculated. The obtained values of γ pointed out the diffuse phase transformation in heavily doped BaTiO3 and great departure from the Curie-Weiss law for low doped ceramics.", publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad", journal = "Processing and Application of Ceramics", title = "Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics", pages = "258-253", number = "4", volume = "4", url = "https://hdl.handle.net/21.15107/rcub_agrospace_2350" }
Paunović, V., Mitić, V., Pavlović, V., Miljković, M.,& Živković, L.. (2010). Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics. in Processing and Application of Ceramics Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 4(4), 253-258. https://hdl.handle.net/21.15107/rcub_agrospace_2350
Paunović V, Mitić V, Pavlović V, Miljković M, Živković L. Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics. in Processing and Application of Ceramics. 2010;4(4):253-258. https://hdl.handle.net/21.15107/rcub_agrospace_2350 .
Paunović, Vesna, Mitić, Vojislav, Pavlović, Vladimir, Miljković, Miroslav, Živković, Ljiljana, "Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics" in Processing and Application of Ceramics, 4, no. 4 (2010):253-258, https://hdl.handle.net/21.15107/rcub_agrospace_2350 .