Electrical properties of barium bismuth titanate
Apstrakt
Family of bismuth oxides was discovered more than 50 years ago by Aurivillius [1]. Recently, there has been renewed interest in the properties of the Aurivillius phases as temperature-stable ferro-piezoelectrics [2]. Several bismuth-layered crystal structures and their properties have been investigated in detail. However, a lot of aspects of the preparation and properties of barium bismuth titanate, BaBi4Ti4O15 [BBiT] remain unexplored, whereas being promising candidate for high-temperature piezoelectric applications, memory application and ferroelectric nonvolatile memories (Fe-RAM). In present work, BBiT was prepared by solid state reaction from mixture of oxide: BaO, TiO2 and Bi2O3 which was, previously, milled for 6 h. Mixture was heated at 750 oC for 4 h and after that sintered at 1130 oC for 1 h. The values of Tc, dielectric constant (ε), the loss tangent (tanδ), degree of relaxation behavior (∆T relaxor) and degree of diffuseness of the material (γ) are summarized in Table below.... The degree of relaxation behavior is found to be only 15 K, which suggests the shift of Tc with frequency is not much distinct in BBiT ceramics. A modified Curie-Weiss relationship is used to study the diffuseness behavior of a ferroelectric phase transition where value of γ indicates the degree of diffuseness of BBiT material. The dielectric relaxation rate foollow the Vogel-Fulcher relation with activation energy = 0.013eV, relaxation frequency = 2.09×108 Hz, and freezing temperature = 378 oC. All this parametars indicate that BBiT is a relaxor ferroelectric.
Ključne reči:
bismuth oxides / bismuth-layered crystal / piezoelectric applications / Vogel-Fulcher relation / dielectric relaxationIzvor:
VIII students meeting, processing and Application of Ceramics, December 2-5, 2009, Novi Sad, Serbia, Programme and book of abstracts, p 41-42, 2009Izdavač:
- Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - CONF AU - Bobić, Jelena AU - Vijatović Petrović, Mirjana AU - Greičius, Simonas AU - Stojanović, Biljana AU - Banys, Juras PY - 2009 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2733 AB - Family of bismuth oxides was discovered more than 50 years ago by Aurivillius [1]. Recently, there has been renewed interest in the properties of the Aurivillius phases as temperature-stable ferro-piezoelectrics [2]. Several bismuth-layered crystal structures and their properties have been investigated in detail. However, a lot of aspects of the preparation and properties of barium bismuth titanate, BaBi4Ti4O15 [BBiT] remain unexplored, whereas being promising candidate for high-temperature piezoelectric applications, memory application and ferroelectric nonvolatile memories (Fe-RAM). In present work, BBiT was prepared by solid state reaction from mixture of oxide: BaO, TiO2 and Bi2O3 which was, previously, milled for 6 h. Mixture was heated at 750 oC for 4 h and after that sintered at 1130 oC for 1 h. The values of Tc, dielectric constant (ε), the loss tangent (tanδ), degree of relaxation behavior (∆T relaxor) and degree of diffuseness of the material (γ) are summarized in Table below. The degree of relaxation behavior is found to be only 15 K, which suggests the shift of Tc with frequency is not much distinct in BBiT ceramics. A modified Curie-Weiss relationship is used to study the diffuseness behavior of a ferroelectric phase transition where value of γ indicates the degree of diffuseness of BBiT material. The dielectric relaxation rate foollow the Vogel-Fulcher relation with activation energy = 0.013eV, relaxation frequency = 2.09×108 Hz, and freezing temperature = 378 oC. All this parametars indicate that BBiT is a relaxor ferroelectric. PB - Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia C3 - VIII students meeting, processing and Application of Ceramics, December 2-5, 2009, Novi Sad, Serbia, Programme and book of abstracts, p 41-42 T1 - Electrical properties of barium bismuth titanate UR - https://hdl.handle.net/21.15107/rcub_rimsi_2733 ER -
@conference{ author = "Bobić, Jelena and Vijatović Petrović, Mirjana and Greičius, Simonas and Stojanović, Biljana and Banys, Juras", year = "2009", abstract = "Family of bismuth oxides was discovered more than 50 years ago by Aurivillius [1]. Recently, there has been renewed interest in the properties of the Aurivillius phases as temperature-stable ferro-piezoelectrics [2]. Several bismuth-layered crystal structures and their properties have been investigated in detail. However, a lot of aspects of the preparation and properties of barium bismuth titanate, BaBi4Ti4O15 [BBiT] remain unexplored, whereas being promising candidate for high-temperature piezoelectric applications, memory application and ferroelectric nonvolatile memories (Fe-RAM). In present work, BBiT was prepared by solid state reaction from mixture of oxide: BaO, TiO2 and Bi2O3 which was, previously, milled for 6 h. Mixture was heated at 750 oC for 4 h and after that sintered at 1130 oC for 1 h. The values of Tc, dielectric constant (ε), the loss tangent (tanδ), degree of relaxation behavior (∆T relaxor) and degree of diffuseness of the material (γ) are summarized in Table below. The degree of relaxation behavior is found to be only 15 K, which suggests the shift of Tc with frequency is not much distinct in BBiT ceramics. A modified Curie-Weiss relationship is used to study the diffuseness behavior of a ferroelectric phase transition where value of γ indicates the degree of diffuseness of BBiT material. The dielectric relaxation rate foollow the Vogel-Fulcher relation with activation energy = 0.013eV, relaxation frequency = 2.09×108 Hz, and freezing temperature = 378 oC. All this parametars indicate that BBiT is a relaxor ferroelectric.", publisher = "Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia", journal = "VIII students meeting, processing and Application of Ceramics, December 2-5, 2009, Novi Sad, Serbia, Programme and book of abstracts, p 41-42", title = "Electrical properties of barium bismuth titanate", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2733" }
Bobić, J., Vijatović Petrović, M., Greičius, S., Stojanović, B.,& Banys, J.. (2009). Electrical properties of barium bismuth titanate. in VIII students meeting, processing and Application of Ceramics, December 2-5, 2009, Novi Sad, Serbia, Programme and book of abstracts, p 41-42 Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia.. https://hdl.handle.net/21.15107/rcub_rimsi_2733
Bobić J, Vijatović Petrović M, Greičius S, Stojanović B, Banys J. Electrical properties of barium bismuth titanate. in VIII students meeting, processing and Application of Ceramics, December 2-5, 2009, Novi Sad, Serbia, Programme and book of abstracts, p 41-42. 2009;. https://hdl.handle.net/21.15107/rcub_rimsi_2733 .
Bobić, Jelena, Vijatović Petrović, Mirjana, Greičius, Simonas, Stojanović, Biljana, Banys, Juras, "Electrical properties of barium bismuth titanate" in VIII students meeting, processing and Application of Ceramics, December 2-5, 2009, Novi Sad, Serbia, Programme and book of abstracts, p 41-42 (2009), https://hdl.handle.net/21.15107/rcub_rimsi_2733 .