Electrical properties of La- and Mn- Doped Barium Titanate
Abstract
Substitution of the barium or titanium ion with small concentrations of ions with a similar radius could lead to structure and microstructure changes and furthermore modification of dielectric and ferroelectric properties. The possibility of easy substitution is enabled due to the capability of the perovskite structure to host different sized ions in the BT lattice. Doping of BaTiO3 (BT) ceramics is very important due to possibility to obtain different materials with required electrical characteristics [1].
Lanthanum was used as a donor dopant and it commonly substitutes Ba in the lattice of barium titanate. Since La has different valence than Ba this change produces a charge imbalance. Therefore, the charge compensation requires the production of the electron, electron holes or vacancies in the material influencing the electrical properties [1]. On the other hand, manganese was believed to substitute Ti and acts as an acceptor with unstable valence, from Mn2+, Mn3+ to Mn4+. Simultan...eous substitution of lanthanum and manganese is expected to maintain charge neutrality without requiring creation of defects if all the Mn ions exist in the trivalent state [2, 3].
In this work, barium titanate doped with 0.3 mol% lanthanum (BTL) and simultaneously doped with 0.3 mol% lanthanum and 0.1 mol % manganese (BTLM) ceramics was investigated. The influence of dopants on structure change, grain size reduction and microstructure development was analyzed. The effect of dopants on dielectric properties and resistivity was studied.
Keywords:
Barium titanate / Doping / perovskite structure / dielectric properties / vacanciesSource:
3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39, 2012Publisher:
- 3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39
Funding / projects:
- Synthesis of nanopowders and processing of ceramics and nanocomposites with specific electric and magnetic properties for application in integrated passive components (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45021)
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Institution/Community
Institut za multidisciplinarna istraživanjaTY - CONF AU - Vijatović Petrović, Mirjana AU - Bobić, Jelena AU - Banys, Juras AU - Stojanović, Biljana PY - 2012 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/3054 AB - Substitution of the barium or titanium ion with small concentrations of ions with a similar radius could lead to structure and microstructure changes and furthermore modification of dielectric and ferroelectric properties. The possibility of easy substitution is enabled due to the capability of the perovskite structure to host different sized ions in the BT lattice. Doping of BaTiO3 (BT) ceramics is very important due to possibility to obtain different materials with required electrical characteristics [1]. Lanthanum was used as a donor dopant and it commonly substitutes Ba in the lattice of barium titanate. Since La has different valence than Ba this change produces a charge imbalance. Therefore, the charge compensation requires the production of the electron, electron holes or vacancies in the material influencing the electrical properties [1]. On the other hand, manganese was believed to substitute Ti and acts as an acceptor with unstable valence, from Mn2+, Mn3+ to Mn4+. Simultaneous substitution of lanthanum and manganese is expected to maintain charge neutrality without requiring creation of defects if all the Mn ions exist in the trivalent state [2, 3]. In this work, barium titanate doped with 0.3 mol% lanthanum (BTL) and simultaneously doped with 0.3 mol% lanthanum and 0.1 mol % manganese (BTLM) ceramics was investigated. The influence of dopants on structure change, grain size reduction and microstructure development was analyzed. The effect of dopants on dielectric properties and resistivity was studied. PB - 3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39 C3 - 3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39 T1 - Electrical properties of La- and Mn- Doped Barium Titanate UR - https://hdl.handle.net/21.15107/rcub_rimsi_3054 ER -
@conference{ author = "Vijatović Petrović, Mirjana and Bobić, Jelena and Banys, Juras and Stojanović, Biljana", year = "2012", abstract = "Substitution of the barium or titanium ion with small concentrations of ions with a similar radius could lead to structure and microstructure changes and furthermore modification of dielectric and ferroelectric properties. The possibility of easy substitution is enabled due to the capability of the perovskite structure to host different sized ions in the BT lattice. Doping of BaTiO3 (BT) ceramics is very important due to possibility to obtain different materials with required electrical characteristics [1]. Lanthanum was used as a donor dopant and it commonly substitutes Ba in the lattice of barium titanate. Since La has different valence than Ba this change produces a charge imbalance. Therefore, the charge compensation requires the production of the electron, electron holes or vacancies in the material influencing the electrical properties [1]. On the other hand, manganese was believed to substitute Ti and acts as an acceptor with unstable valence, from Mn2+, Mn3+ to Mn4+. Simultaneous substitution of lanthanum and manganese is expected to maintain charge neutrality without requiring creation of defects if all the Mn ions exist in the trivalent state [2, 3]. In this work, barium titanate doped with 0.3 mol% lanthanum (BTL) and simultaneously doped with 0.3 mol% lanthanum and 0.1 mol % manganese (BTLM) ceramics was investigated. The influence of dopants on structure change, grain size reduction and microstructure development was analyzed. The effect of dopants on dielectric properties and resistivity was studied.", publisher = "3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39", journal = "3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39", title = "Electrical properties of La- and Mn- Doped Barium Titanate", url = "https://hdl.handle.net/21.15107/rcub_rimsi_3054" }
Vijatović Petrović, M., Bobić, J., Banys, J.,& Stojanović, B.. (2012). Electrical properties of La- and Mn- Doped Barium Titanate. in 3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39 3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39.. https://hdl.handle.net/21.15107/rcub_rimsi_3054
Vijatović Petrović M, Bobić J, Banys J, Stojanović B. Electrical properties of La- and Mn- Doped Barium Titanate. in 3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39. 2012;. https://hdl.handle.net/21.15107/rcub_rimsi_3054 .
Vijatović Petrović, Mirjana, Bobić, Jelena, Banys, Juras, Stojanović, Biljana, "Electrical properties of La- and Mn- Doped Barium Titanate" in 3rd Workshop COST MP0904, 23. April 2012, Vilnius, Lithuania, Programme and book of abstracts , p 39 (2012), https://hdl.handle.net/21.15107/rcub_rimsi_3054 .