Influence of mechanical activation on synthesis and properties of the MgO-TiO2 system

2007
Authors
Petrović, VeraMaričić, Aleksa

Labus, Nebojša

Ristić, Momčilo M.
Contributors
Ristić, Momčilo M.Article (Published version)
Metadata
Show full item recordAbstract
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.
Keywords:
sintering / MgO / TiO2 / dielectric constant / quality factor / specific electrical resistivitySource:
Science of Sintering, 2007, 31, 1, 59-65Publisher:
- Belgrade : International Institute for the Science of Sintering
DOI: 10.2298/SOS0701059P
ISSN: 1820-7413 (Online); 0350-820X
WoS: 000247123000008
Scopus: 2-s2.0-70849104590
Institution/Community
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 .