Influence of mechanical activation on synthesis and properties of the MgO-TiO2 system
2007
Аутори
Petrović, VeraMaričić, Aleksa
Labus, Nebojša
Ristić, Momčilo M.
Остала ауторства
Ristić, Momčilo M.Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Materials applied in electronics such as multilayer capacitors are an important field of ceramic materials. Magnesium titanate based dielectric materials are used for producing type-I capacitors. A common way of obtaining this material is a solid-state reaction during reaction sintering. The process of sintering can be enhanced if mechanical activation precedes. In this work starting powders of magnesium carbonate (MgCO3) and titanium dioxide (TiO2) with a rutile crystal modification were weighed to attain a 1:1 molar MgCO3:TiO2 ratio. Mechanical activation of the starting mixture was performed by high energy ball milling using ZrO balls and vessels with a ball to powder mass ratio of 40:1. The observed grinding times were 15, 30, 60 and 120 minutes. Powder characterization was conducted using X ray powder diffraction, DTA analysis up to 1000 o C and particle morphology changes were observed with Scanning Electron Microscopy. Isothermal sintering of compacted powders was conducted at 1...100ºC during 30, 60 and 180 minutes. For specimens synthesized in such a manner, microwave dielectric properties were measured, quality factor Q, specific electrical resistivity (ρ) and the dielectric constant (Єr). In this work we explain the influence of mechanical activation on the MgCO3-TiO2 system leading to titanate formation during sintering, as well as induced changes in microwave dielectric properties.
Кључне речи:
sintering / MgO / TiO2 / dielectric constant / quality factor / specific electrical resistivityИзвор:
Science of Sintering, 2007, 31, 1, 59-65Издавач:
- Belgrade : International Institute for the Science of Sintering
DOI: 10.2298/SOS0701059P
ISSN: 1820-7413; 0350-820X
WoS: 000247123000008
Scopus: 2-s2.0-70849104590
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Petrović, Vera AU - Maričić, Aleksa AU - Labus, Nebojša AU - Ristić, Momčilo M. PY - 2007 UR - https://dais.sanu.ac.rs/123456789/224 AB - Materials applied in electronics such as multilayer capacitors are an important field of ceramic materials. Magnesium titanate based dielectric materials are used for producing type-I capacitors. A common way of obtaining this material is a solid-state reaction during reaction sintering. The process of sintering can be enhanced if mechanical activation precedes. In this work starting powders of magnesium carbonate (MgCO3) and titanium dioxide (TiO2) with a rutile crystal modification were weighed to attain a 1:1 molar MgCO3:TiO2 ratio. Mechanical activation of the starting mixture was performed by high energy ball milling using ZrO balls and vessels with a ball to powder mass ratio of 40:1. The observed grinding times were 15, 30, 60 and 120 minutes. Powder characterization was conducted using X ray powder diffraction, DTA analysis up to 1000 o C and particle morphology changes were observed with Scanning Electron Microscopy. Isothermal sintering of compacted powders was conducted at 1100ºC during 30, 60 and 180 minutes. For specimens synthesized in such a manner, microwave dielectric properties were measured, quality factor Q, specific electrical resistivity (ρ) and the dielectric constant (Єr). In this work we explain the influence of mechanical activation on the MgCO3-TiO2 system leading to titanate formation during sintering, as well as induced changes in microwave dielectric properties. PB - Belgrade : International Institute for the Science of Sintering T2 - Science of Sintering T1 - Influence of mechanical activation on synthesis and properties of the MgO-TiO2 system SP - 59 EP - 65 VL - 31 IS - 1 DO - 10.2298/SOS0701059P UR - https://hdl.handle.net/21.15107/rcub_dais_224 ER -
@article{ author = "Petrović, Vera and Maričić, Aleksa and Labus, Nebojša and Ristić, Momčilo M.", year = "2007", abstract = "Materials applied in electronics such as multilayer capacitors are an important field of ceramic materials. Magnesium titanate based dielectric materials are used for producing type-I capacitors. A common way of obtaining this material is a solid-state reaction during reaction sintering. The process of sintering can be enhanced if mechanical activation precedes. In this work starting powders of magnesium carbonate (MgCO3) and titanium dioxide (TiO2) with a rutile crystal modification were weighed to attain a 1:1 molar MgCO3:TiO2 ratio. Mechanical activation of the starting mixture was performed by high energy ball milling using ZrO balls and vessels with a ball to powder mass ratio of 40:1. The observed grinding times were 15, 30, 60 and 120 minutes. Powder characterization was conducted using X ray powder diffraction, DTA analysis up to 1000 o C and particle morphology changes were observed with Scanning Electron Microscopy. Isothermal sintering of compacted powders was conducted at 1100ºC during 30, 60 and 180 minutes. For specimens synthesized in such a manner, microwave dielectric properties were measured, quality factor Q, specific electrical resistivity (ρ) and the dielectric constant (Єr). In this work we explain the influence of mechanical activation on the MgCO3-TiO2 system leading to titanate formation during sintering, as well as induced changes in microwave dielectric properties.", publisher = "Belgrade : International Institute for the Science of Sintering", journal = "Science of Sintering", title = "Influence of mechanical activation on synthesis and properties of the MgO-TiO2 system", pages = "59-65", volume = "31", number = "1", doi = "10.2298/SOS0701059P", url = "https://hdl.handle.net/21.15107/rcub_dais_224" }
Petrović, V., Maričić, A., Labus, N.,& Ristić, M. M.. (2007). Influence of mechanical activation on synthesis and properties of the MgO-TiO2 system. in Science of Sintering Belgrade : International Institute for the Science of Sintering., 31(1), 59-65. https://doi.org/10.2298/SOS0701059P https://hdl.handle.net/21.15107/rcub_dais_224
Petrović V, Maričić A, Labus N, Ristić MM. Influence of mechanical activation on synthesis and properties of the MgO-TiO2 system. in Science of Sintering. 2007;31(1):59-65. doi:10.2298/SOS0701059P https://hdl.handle.net/21.15107/rcub_dais_224 .
Petrović, Vera, Maričić, Aleksa, Labus, Nebojša, Ristić, Momčilo M., "Influence of mechanical activation on synthesis and properties of the MgO-TiO2 system" in Science of Sintering, 31, no. 1 (2007):59-65, https://doi.org/10.2298/SOS0701059P ., https://hdl.handle.net/21.15107/rcub_dais_224 .