Ho2O3 Additive Effects on BaTiO3 Ceramics Microstructure and Dielectric Properties
2012
Аутори
Paunović, VesnaMitić, Vojislav V.
Miljković, Miroslav
Pavlović, Vera P.
Živković, Ljiljana
Остала ауторства
Ristić, Momčilo M.Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Doped BaTiO 3-ceramics is very interesting for their application as PTCR resistors, multilayer ceramic capacitors, thermal sensors etc. Ho doped BaTiO 3 ceramics, with different Ho 2O 3 content, ranging from 0.01 to 1.0 wt% Ho, were investigated regarding their microstructural and dielectric characteristics. The samples were prepared by the conventional solid state reaction and sintered at 1320° and 1380°C in an air atmosphere for 4 hours. The grain size and microstructure characteristics for various samples and their phase composition was carried out using a scanning electron microscope (SEM) equipped with EDS system. SEM analysis of Ho/BaTiO 3 doped ceramics showed that in samples doped with a rare-earth ions low level, the grain size ranged from 20-30μμm, while with the higher dopant concentration the abnormal grain growth is inhibited and the grain size ranged between 2-10μμm. Dielectric measurements were carried out as a function of temperature up to180 °C. The low doped samples s...intered at 1380 °C, display the high value of dielectric permittivity at room temperature, 2400 for 0.01 Ho/BaTiO 3. A nearly flat permittivity-response was obtained in specimens with higher additive content. Using a Curie-Weiss low and modified CurieWeiss low the Curie constant (C), Curie temperature (Tc) and a critical exponent of nonlinearity (γ) were calculated. The obtained value of γ pointed out that the specimens have almost sharp phase transition.
Кључне речи:
BaTiO3 / barium titanate / dielectric properties / microstructure / sinteringИзвор:
Science of Sintering, 2012, 44, 2, 223-233Издавач:
- Belgrade : International Institute for the Science of Sintering
Финансирање / пројекти:
- Усмерена синтеза, структура и својства мултифункционалних материјала (RS-MESTD-Basic Research (BR or ON)-172057)
DOI: 10.2298/SOS1202223P
ISSN: 1820-7413; 0350-820X
WoS: 000318148600010
Scopus: 2-s2.0-84866404412
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Paunović, Vesna AU - Mitić, Vojislav V. AU - Miljković, Miroslav AU - Pavlović, Vera P. AU - Živković, Ljiljana PY - 2012 UR - https://dais.sanu.ac.rs/123456789/194 AB - Doped BaTiO 3-ceramics is very interesting for their application as PTCR resistors, multilayer ceramic capacitors, thermal sensors etc. Ho doped BaTiO 3 ceramics, with different Ho 2O 3 content, ranging from 0.01 to 1.0 wt% Ho, were investigated regarding their microstructural and dielectric characteristics. The samples were prepared by the conventional solid state reaction and sintered at 1320° and 1380°C in an air atmosphere for 4 hours. The grain size and microstructure characteristics for various samples and their phase composition was carried out using a scanning electron microscope (SEM) equipped with EDS system. SEM analysis of Ho/BaTiO 3 doped ceramics showed that in samples doped with a rare-earth ions low level, the grain size ranged from 20-30μμm, while with the higher dopant concentration the abnormal grain growth is inhibited and the grain size ranged between 2-10μμm. Dielectric measurements were carried out as a function of temperature up to180 °C. The low doped samples sintered at 1380 °C, display the high value of dielectric permittivity at room temperature, 2400 for 0.01 Ho/BaTiO 3. A nearly flat permittivity-response was obtained in specimens with higher additive content. Using a Curie-Weiss low and modified CurieWeiss low the Curie constant (C), Curie temperature (Tc) and a critical exponent of nonlinearity (γ) were calculated. The obtained value of γ pointed out that the specimens have almost sharp phase transition. PB - Belgrade : International Institute for the Science of Sintering T2 - Science of Sintering T1 - Ho2O3 Additive Effects on BaTiO3 Ceramics Microstructure and Dielectric Properties SP - 223 EP - 233 VL - 44 IS - 2 DO - 10.2298/SOS1202223P UR - https://hdl.handle.net/21.15107/rcub_dais_194 ER -
@article{ author = "Paunović, Vesna and Mitić, Vojislav V. and Miljković, Miroslav and Pavlović, Vera P. and Živković, Ljiljana", year = "2012", abstract = "Doped BaTiO 3-ceramics is very interesting for their application as PTCR resistors, multilayer ceramic capacitors, thermal sensors etc. Ho doped BaTiO 3 ceramics, with different Ho 2O 3 content, ranging from 0.01 to 1.0 wt% Ho, were investigated regarding their microstructural and dielectric characteristics. The samples were prepared by the conventional solid state reaction and sintered at 1320° and 1380°C in an air atmosphere for 4 hours. The grain size and microstructure characteristics for various samples and their phase composition was carried out using a scanning electron microscope (SEM) equipped with EDS system. SEM analysis of Ho/BaTiO 3 doped ceramics showed that in samples doped with a rare-earth ions low level, the grain size ranged from 20-30μμm, while with the higher dopant concentration the abnormal grain growth is inhibited and the grain size ranged between 2-10μμm. Dielectric measurements were carried out as a function of temperature up to180 °C. The low doped samples sintered at 1380 °C, display the high value of dielectric permittivity at room temperature, 2400 for 0.01 Ho/BaTiO 3. A nearly flat permittivity-response was obtained in specimens with higher additive content. Using a Curie-Weiss low and modified CurieWeiss low the Curie constant (C), Curie temperature (Tc) and a critical exponent of nonlinearity (γ) were calculated. The obtained value of γ pointed out that the specimens have almost sharp phase transition.", publisher = "Belgrade : International Institute for the Science of Sintering", journal = "Science of Sintering", title = "Ho2O3 Additive Effects on BaTiO3 Ceramics Microstructure and Dielectric Properties", pages = "223-233", volume = "44", number = "2", doi = "10.2298/SOS1202223P", url = "https://hdl.handle.net/21.15107/rcub_dais_194" }
Paunović, V., Mitić, V. V., Miljković, M., Pavlović, V. P.,& Živković, L.. (2012). Ho2O3 Additive Effects on BaTiO3 Ceramics Microstructure and Dielectric Properties. in Science of Sintering Belgrade : International Institute for the Science of Sintering., 44(2), 223-233. https://doi.org/10.2298/SOS1202223P https://hdl.handle.net/21.15107/rcub_dais_194
Paunović V, Mitić VV, Miljković M, Pavlović VP, Živković L. Ho2O3 Additive Effects on BaTiO3 Ceramics Microstructure and Dielectric Properties. in Science of Sintering. 2012;44(2):223-233. doi:10.2298/SOS1202223P https://hdl.handle.net/21.15107/rcub_dais_194 .
Paunović, Vesna, Mitić, Vojislav V., Miljković, Miroslav, Pavlović, Vera P., Živković, Ljiljana, "Ho2O3 Additive Effects on BaTiO3 Ceramics Microstructure and Dielectric Properties" in Science of Sintering, 44, no. 2 (2012):223-233, https://doi.org/10.2298/SOS1202223P ., https://hdl.handle.net/21.15107/rcub_dais_194 .