BARIUM TITANATE PROPERTIES ENHANCED BY ATTRITION MILLING
Апстракт
Barium titanate powder was prepared by soft chemical process from polymeric
precursors (modified Pechini process). The obtained BT powder was nanosized with
primary particles ~ 74 nm, but factor of agglomeration (Fagg) pointed on existence of
agglomerates ~ 6 �����m. It is well known that agglomerates could influence on setback of
materials structure and properties. In order to de-agglomerate nanopowder and to
improve BT properties, attrition milling was performed.
Barium titanate powder was treated in attrition mill with zirconia media for 1h in
2% polyacrylic acid. Milling induced reduction of agglomerates in size and number.
Characterization of both starting (BT) and milled (BTA) powders was performed. The
comparison of obtained results showed enhancement of powders properties generated by
attrition milling. To investigate the effect of milling on electrical properties of ceramics,
both BT powders were uniaxially pressed and sintered at 1300°C for 8 h in air. The
density... of BTA ceramics was 95 % of theoretical value and 90 % of BT. Temperature
dependence of relative permittivity showed three structural transitions characteristic for
ferroelectric BT ceramics. The temperature transition from ferroelectric to paraelectric
was found to be at 120°C for BT and 122°C for BTA. Dielectric constant value was
around 6700 for BTA which is much higher value in comparison with non-treated BT
where permittivity was 1340. Dielectric losses were below 0.03 for both BT ceramics.
Кључне речи:
Barium titanate / chemical process from polymeric precursors / Milling / Dielectric constant / ferroelectric to paraelectricИзвор:
The Second Early Stage Researchers Workshop” COST MP0904 - SIMUFER Novi Sad, Serbia, November 16-18, 2011, Programme and book of abstracts, p 116, 2011Издавач:
- Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Vijatović Petrović, Mirjana AU - Bobić, Jelena AU - Banys, Juras AU - Stojanović, Biljana AU - Bowen, Paul PY - 2011 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2741 AB - Barium titanate powder was prepared by soft chemical process from polymeric precursors (modified Pechini process). The obtained BT powder was nanosized with primary particles ~ 74 nm, but factor of agglomeration (Fagg) pointed on existence of agglomerates ~ 6 �����m. It is well known that agglomerates could influence on setback of materials structure and properties. In order to de-agglomerate nanopowder and to improve BT properties, attrition milling was performed. Barium titanate powder was treated in attrition mill with zirconia media for 1h in 2% polyacrylic acid. Milling induced reduction of agglomerates in size and number. Characterization of both starting (BT) and milled (BTA) powders was performed. The comparison of obtained results showed enhancement of powders properties generated by attrition milling. To investigate the effect of milling on electrical properties of ceramics, both BT powders were uniaxially pressed and sintered at 1300°C for 8 h in air. The density of BTA ceramics was 95 % of theoretical value and 90 % of BT. Temperature dependence of relative permittivity showed three structural transitions characteristic for ferroelectric BT ceramics. The temperature transition from ferroelectric to paraelectric was found to be at 120°C for BT and 122°C for BTA. Dielectric constant value was around 6700 for BTA which is much higher value in comparison with non-treated BT where permittivity was 1340. Dielectric losses were below 0.03 for both BT ceramics. PB - Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia C3 - The Second Early Stage Researchers Workshop” COST MP0904 - SIMUFER Novi Sad, Serbia, November 16-18, 2011, Programme and book of abstracts, p 116 T1 - BARIUM TITANATE PROPERTIES ENHANCED BY ATTRITION MILLING UR - https://hdl.handle.net/21.15107/rcub_rimsi_2741 ER -
@conference{ author = "Vijatović Petrović, Mirjana and Bobić, Jelena and Banys, Juras and Stojanović, Biljana and Bowen, Paul", year = "2011", abstract = "Barium titanate powder was prepared by soft chemical process from polymeric precursors (modified Pechini process). The obtained BT powder was nanosized with primary particles ~ 74 nm, but factor of agglomeration (Fagg) pointed on existence of agglomerates ~ 6 �����m. It is well known that agglomerates could influence on setback of materials structure and properties. In order to de-agglomerate nanopowder and to improve BT properties, attrition milling was performed. Barium titanate powder was treated in attrition mill with zirconia media for 1h in 2% polyacrylic acid. Milling induced reduction of agglomerates in size and number. Characterization of both starting (BT) and milled (BTA) powders was performed. The comparison of obtained results showed enhancement of powders properties generated by attrition milling. To investigate the effect of milling on electrical properties of ceramics, both BT powders were uniaxially pressed and sintered at 1300°C for 8 h in air. The density of BTA ceramics was 95 % of theoretical value and 90 % of BT. Temperature dependence of relative permittivity showed three structural transitions characteristic for ferroelectric BT ceramics. The temperature transition from ferroelectric to paraelectric was found to be at 120°C for BT and 122°C for BTA. Dielectric constant value was around 6700 for BTA which is much higher value in comparison with non-treated BT where permittivity was 1340. Dielectric losses were below 0.03 for both BT ceramics.", publisher = "Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia", journal = "The Second Early Stage Researchers Workshop” COST MP0904 - SIMUFER Novi Sad, Serbia, November 16-18, 2011, Programme and book of abstracts, p 116", title = "BARIUM TITANATE PROPERTIES ENHANCED BY ATTRITION MILLING", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2741" }
Vijatović Petrović, M., Bobić, J., Banys, J., Stojanović, B.,& Bowen, P.. (2011). BARIUM TITANATE PROPERTIES ENHANCED BY ATTRITION MILLING. in The Second Early Stage Researchers Workshop” COST MP0904 - SIMUFER Novi Sad, Serbia, November 16-18, 2011, Programme and book of abstracts, p 116 Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia.. https://hdl.handle.net/21.15107/rcub_rimsi_2741
Vijatović Petrović M, Bobić J, Banys J, Stojanović B, Bowen P. BARIUM TITANATE PROPERTIES ENHANCED BY ATTRITION MILLING. in The Second Early Stage Researchers Workshop” COST MP0904 - SIMUFER Novi Sad, Serbia, November 16-18, 2011, Programme and book of abstracts, p 116. 2011;. https://hdl.handle.net/21.15107/rcub_rimsi_2741 .
Vijatović Petrović, Mirjana, Bobić, Jelena, Banys, Juras, Stojanović, Biljana, Bowen, Paul, "BARIUM TITANATE PROPERTIES ENHANCED BY ATTRITION MILLING" in The Second Early Stage Researchers Workshop” COST MP0904 - SIMUFER Novi Sad, Serbia, November 16-18, 2011, Programme and book of abstracts, p 116 (2011), https://hdl.handle.net/21.15107/rcub_rimsi_2741 .