Ho2O3 Additive Effects on BaTiO3 Ceramics Microstructure and Dielectric Properties
2012
Authors
Paunović, VesnaMitić, Vojislav V.
Miljković, Miroslav
Pavlović, Vera P.
Živković, Ljiljana
Contributors
Ristić, Momčilo M.Article
Metadata
Show full item recordAbstract
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.
Keywords:
BaTiO3 / barium titanate / dielectric properties / microstructure / sinteringSource:
Science of Sintering, 2012, 223-233Publisher:
- Belgrade : International Institute for the Science of Sintering
Funding / projects:
- Directed synthesis, structure and properties of multifunctional materials (RS-MESTD-Basic Research (BR or ON)-172057)
DOI: 10.2298/SOS1202223P
ISSN: 1820-7413
WoS: 000318148600010
Scopus: 2-s2.0-84866404412
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VinčaTY - JOUR AU - Paunović, Vesna AU - Mitić, Vojislav V. AU - Miljković, Miroslav AU - Pavlović, Vera P. AU - Živković, Ljiljana PY - 2012 UR - http://dais.sanu.ac.rs/123456789/194 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7364 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 DO - 10.2298/SOS1202223P 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", doi = "10.2298/SOS1202223P" }
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., 223-233. https://doi.org/10.2298/SOS1202223P
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;:223-233. doi:10.2298/SOS1202223P .
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 (2012):223-233, https://doi.org/10.2298/SOS1202223P . .