TY  - CONF
AU  - Ristić, Momčilo M.
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Bykov, O. I.
AU  - Vasilkovskaya, M. A.
AU  - Klochkov, L. O.
AU  - Timofeeva, I. I.
PY  - 2009
UR  - https://dais.sanu.ac.rs/123456789/622
AB  - Lately a great attention is spared development of materials, possessing high stable dielectric properties. Among such materials a considerable place is occupied by titanates of metal series, including titanate of magnesium. In the present work titanates of magnesium got by co-operation at the high temperatures of magnesium oxides (MgO) and titanium oxides (TiO2) , taken in correlation 2:1. To improve the interaction of components it was investigated influence of time of foregrinding of initial components  – magnesium and titanium oxides on composition of sintering material. After grinding during 5 and 10 minutes phase composition does not change practically. After 20 minutes of grinding along with the phases described higher the washed out weak lines appear reflections which behave to the phase of TiO2 with an orthorhombic structure. At the increase of grinding lime intensity of X-ray reflection lines from the orthorhombic oxide of titan is grown. Pays attention on itself a fact that from data [1 ] orthorhombic phase ofTiO2 with the structure of type ?- PbO2 is formed in the conditions of high pressures. Format10n of it at grinding testifies to deformation influence on the particles of the process. On the same points to the fact that after grinding of powders already during 10 minutes the x-ray reflection lines from all phases begin to broaden and with the increase of grinding time broadening of lines is grown. Weak and washed out reflection lines of phase MgTiO) is appeared after 80 and 120 minutes of grinding. It is possible to suppose that forming of high pressure orthorhombic phase TiO2 is necessary precondition to begin formation of triple rhombohedral phase of magnesium titanate MgTiO) .
At the same time the start of magnesium titanate forming at grinding of oxides powders mixtures is accompanied with weakening of reflection lines intensity from the anatase TiO2, At all annealing temperatures (900, 1000, \100 °c) was noticed that d-spaced distances and the crystalline grate periods of magnesium titanate MgTiO, change accordingly, increased with the increase of foregrinding time. It points out the connection possesses the area of homogeneity, what the state diagram of the system MgO - Ti02 also testifies [2] . Possibility to make changes of magnesium titanate composition MgTi03 by a change time of mechanochemical rough-down of initial oxides mixtures can create pre-conditions and also for varying of properties, necessary for different application and devices domains this connection is used. A preliminary grade promotes also to forming of sppinel phase for magnesium titanate Mg,TiO4' as brings in imperfectness in oxides, facilitating interaction betwcen them.
PB  - Kiev
C3  - International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book
T1  - Forming of titanium titnate
SP  - 121
EP  - 122
UR  - https://hdl.handle.net/21.15107/rcub_dais_622
ER  - 

@conference{
author = "Ristić, Momčilo M. and Obradović, Nina and Filipović, Suzana and Bykov, O. I. and Vasilkovskaya, M. A. and Klochkov, L. O. and Timofeeva, I. I.",
year = "2009",
abstract = "Lately a great attention is spared development of materials, possessing high stable dielectric properties. Among such materials a considerable place is occupied by titanates of metal series, including titanate of magnesium. In the present work titanates of magnesium got by co-operation at the high temperatures of magnesium oxides (MgO) and titanium oxides (TiO2) , taken in correlation 2:1. To improve the interaction of components it was investigated influence of time of foregrinding of initial components  – magnesium and titanium oxides on composition of sintering material. After grinding during 5 and 10 minutes phase composition does not change practically. After 20 minutes of grinding along with the phases described higher the washed out weak lines appear reflections which behave to the phase of TiO2 with an orthorhombic structure. At the increase of grinding lime intensity of X-ray reflection lines from the orthorhombic oxide of titan is grown. Pays attention on itself a fact that from data [1 ] orthorhombic phase ofTiO2 with the structure of type ?- PbO2 is formed in the conditions of high pressures. Format10n of it at grinding testifies to deformation influence on the particles of the process. On the same points to the fact that after grinding of powders already during 10 minutes the x-ray reflection lines from all phases begin to broaden and with the increase of grinding time broadening of lines is grown. Weak and washed out reflection lines of phase MgTiO) is appeared after 80 and 120 minutes of grinding. It is possible to suppose that forming of high pressure orthorhombic phase TiO2 is necessary precondition to begin formation of triple rhombohedral phase of magnesium titanate MgTiO) .
At the same time the start of magnesium titanate forming at grinding of oxides powders mixtures is accompanied with weakening of reflection lines intensity from the anatase TiO2, At all annealing temperatures (900, 1000, \100 °c) was noticed that d-spaced distances and the crystalline grate periods of magnesium titanate MgTiO, change accordingly, increased with the increase of foregrinding time. It points out the connection possesses the area of homogeneity, what the state diagram of the system MgO - Ti02 also testifies [2] . Possibility to make changes of magnesium titanate composition MgTi03 by a change time of mechanochemical rough-down of initial oxides mixtures can create pre-conditions and also for varying of properties, necessary for different application and devices domains this connection is used. A preliminary grade promotes also to forming of sppinel phase for magnesium titanate Mg,TiO4' as brings in imperfectness in oxides, facilitating interaction betwcen them.",
publisher = "Kiev",
journal = "International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book",
title = "Forming of titanium titnate",
pages = "121-122",
url = "https://hdl.handle.net/21.15107/rcub_dais_622"
}

Ristić, M. M., Obradović, N., Filipović, S., Bykov, O. I., Vasilkovskaya, M. A., Klochkov, L. O.,& Timofeeva, I. I.. (2009). Forming of titanium titnate. in International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book
Kiev., 121-122.
https://hdl.handle.net/21.15107/rcub_dais_622

Ristić MM, Obradović N, Filipović S, Bykov OI, Vasilkovskaya MA, Klochkov LO, Timofeeva II. Forming of titanium titnate. in International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book. 2009;:121-122.
https://hdl.handle.net/21.15107/rcub_dais_622 .

Ristić, Momčilo M., Obradović, Nina, Filipović, Suzana, Bykov, O. I., Vasilkovskaya, M. A., Klochkov, L. O., Timofeeva, I. I., "Forming of titanium titnate" in International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book (2009):121-122,
https://hdl.handle.net/21.15107/rcub_dais_622 .

TY  - CONF
AU  - Ristić, Momčilo M.
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Bykov, O. I.
AU  - Vasilkovskaya, M. A.
AU  - Klochkov, L. O.
AU  - Timofeeva, I. I.
PY  - 2009
UR  - https://dais.sanu.ac.rs/123456789/623
AB  - Complex compounds with oxide phases of Ba, 2n, and 11 are widely used in instrument engineering. It is also important to find such production routes for ceramics, which provide their stable structure and properties. Phase formation was investigated for titan, zirconium and barium oxides mixtures during their sintering, after pretreatment by milling of oxides mixtures with high power planetary-type mill. It was shown that active interaction of transferred oxides is observed after milling in the planetary mill. In addition to the presence of initial oxides, formation of complex compounds (barium and zinc titanates – Ba4Ti12O27 BaTiO3, ZnTiO3) was visible after 10 and 20 minutes of milling. The phase composition did not practically change after milling for 40 and 80 minutes. Furthermore, all reflection lines were strongly broadened and overlapped. Sintering of these mixtures after milling was conducted at temperatures 900, 1000 and 1100 °C for 2 hours on air with heating rate of 10 C/min. The complex oxide phase, close to BaZn2Ti4O11 composition, was found as a result of sintering of powders mixture at 900 °C, powder mixture was pretreated for 5 minutes at planetary mill. In addition, phases of ZnTiO3 and BaTiO3 were present. These phases were preserved for long-continued milling, but main components' ratio changed. The formation of BaZn2Ti4O11 phase with changes of interplanar spacings was investigated with variation of time of milling and sintering at temperatures of 1000 and 1100 °C. The Zn2TiO4 cubic phase was also present, its amount decreases only after 80 minutes of high power milling and sintering at 1100 °C. Results of our work showed, that for the system of three oxides active interaction was observed already on the high power milling stage. Sintering at the temperatures of 1000 and 1100 °C resulted in formation ofBaZn1Ti40 l1 oxide phase with composition variation in its homogeneity region.
PB  - Kiev
C3  - International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book
T1  - Phase Formation at the Sintering of Sa, Zn, Ti Oxides
SP  - 140
EP  - 140
UR  - https://hdl.handle.net/21.15107/rcub_dais_623
ER  - 

@conference{
author = "Ristić, Momčilo M. and Obradović, Nina and Filipović, Suzana and Bykov, O. I. and Vasilkovskaya, M. A. and Klochkov, L. O. and Timofeeva, I. I.",
year = "2009",
abstract = "Complex compounds with oxide phases of Ba, 2n, and 11 are widely used in instrument engineering. It is also important to find such production routes for ceramics, which provide their stable structure and properties. Phase formation was investigated for titan, zirconium and barium oxides mixtures during their sintering, after pretreatment by milling of oxides mixtures with high power planetary-type mill. It was shown that active interaction of transferred oxides is observed after milling in the planetary mill. In addition to the presence of initial oxides, formation of complex compounds (barium and zinc titanates – Ba4Ti12O27 BaTiO3, ZnTiO3) was visible after 10 and 20 minutes of milling. The phase composition did not practically change after milling for 40 and 80 minutes. Furthermore, all reflection lines were strongly broadened and overlapped. Sintering of these mixtures after milling was conducted at temperatures 900, 1000 and 1100 °C for 2 hours on air with heating rate of 10 C/min. The complex oxide phase, close to BaZn2Ti4O11 composition, was found as a result of sintering of powders mixture at 900 °C, powder mixture was pretreated for 5 minutes at planetary mill. In addition, phases of ZnTiO3 and BaTiO3 were present. These phases were preserved for long-continued milling, but main components' ratio changed. The formation of BaZn2Ti4O11 phase with changes of interplanar spacings was investigated with variation of time of milling and sintering at temperatures of 1000 and 1100 °C. The Zn2TiO4 cubic phase was also present, its amount decreases only after 80 minutes of high power milling and sintering at 1100 °C. Results of our work showed, that for the system of three oxides active interaction was observed already on the high power milling stage. Sintering at the temperatures of 1000 and 1100 °C resulted in formation ofBaZn1Ti40 l1 oxide phase with composition variation in its homogeneity region.",
publisher = "Kiev",
journal = "International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book",
title = "Phase Formation at the Sintering of Sa, Zn, Ti Oxides",
pages = "140-140",
url = "https://hdl.handle.net/21.15107/rcub_dais_623"
}

Ristić, M. M., Obradović, N., Filipović, S., Bykov, O. I., Vasilkovskaya, M. A., Klochkov, L. O.,& Timofeeva, I. I.. (2009). Phase Formation at the Sintering of Sa, Zn, Ti Oxides. in International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book
Kiev., 140-140.
https://hdl.handle.net/21.15107/rcub_dais_623

Ristić MM, Obradović N, Filipović S, Bykov OI, Vasilkovskaya MA, Klochkov LO, Timofeeva II. Phase Formation at the Sintering of Sa, Zn, Ti Oxides. in International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book. 2009;:140-140.
https://hdl.handle.net/21.15107/rcub_dais_623 .

Ristić, Momčilo M., Obradović, Nina, Filipović, Suzana, Bykov, O. I., Vasilkovskaya, M. A., Klochkov, L. O., Timofeeva, I. I., "Phase Formation at the Sintering of Sa, Zn, Ti Oxides" in International conference on sintering : dedicated to 40th anniversary of IISS, September 7-11, 2009, Kiev, Ukraine  : conference program : abstract book (2009):140-140,
https://hdl.handle.net/21.15107/rcub_dais_623 .

TY  - JOUR
AU  - Ristić, Momčilo M.
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Bykov, A. I.
AU  - Vasil'kovskaya, M. A.
AU  - Klochkov, L. A.
AU  - Timofeeva, I. I.
PY  - 2009
UR  - https://dais.sanu.ac.rs/123456789/3459
AB  - The paper examines the phase formation in the mechanochemical treatment and subsequent annealing of TiO 2 and MgO mixtures. It is established that the MgTiO 3 phase forms during annealing of the above powder mixtures at 900, 1000, and 1100°C. Preliminary grinding of oxides in a high-energy planetary-ball mill after annealing produces the MgTiO 3 phase within its homogeneity range. The lattice parameters are determined at the boundary of the homogeneity region. Preliminary grinding of the oxide mixture produces the spinel-type Mg 2TiO 4 phase. © 2009 Springer Science+Business Media, Inc.
PB  - Springer
T2  - Powder Metallurgy and Metal Ceramics
T1  - Formation of magnesium titanates
SP  - 371
EP  - 374
VL  - 48
IS  - 7-8
DO  - 10.1007/s11106-009-9157-0
UR  - https://hdl.handle.net/21.15107/rcub_dais_3459
ER  - 

@article{
author = "Ristić, Momčilo M. and Obradović, Nina and Filipović, Suzana and Bykov, A. I. and Vasil'kovskaya, M. A. and Klochkov, L. A. and Timofeeva, I. I.",
year = "2009",
abstract = "The paper examines the phase formation in the mechanochemical treatment and subsequent annealing of TiO 2 and MgO mixtures. It is established that the MgTiO 3 phase forms during annealing of the above powder mixtures at 900, 1000, and 1100°C. Preliminary grinding of oxides in a high-energy planetary-ball mill after annealing produces the MgTiO 3 phase within its homogeneity range. The lattice parameters are determined at the boundary of the homogeneity region. Preliminary grinding of the oxide mixture produces the spinel-type Mg 2TiO 4 phase. © 2009 Springer Science+Business Media, Inc.",
publisher = "Springer",
journal = "Powder Metallurgy and Metal Ceramics",
title = "Formation of magnesium titanates",
pages = "371-374",
volume = "48",
number = "7-8",
doi = "10.1007/s11106-009-9157-0",
url = "https://hdl.handle.net/21.15107/rcub_dais_3459"
}

Ristić, M. M., Obradović, N., Filipović, S., Bykov, A. I., Vasil'kovskaya, M. A., Klochkov, L. A.,& Timofeeva, I. I.. (2009). Formation of magnesium titanates. in Powder Metallurgy and Metal Ceramics
Springer., 48(7-8), 371-374.
https://doi.org/10.1007/s11106-009-9157-0
https://hdl.handle.net/21.15107/rcub_dais_3459

Ristić MM, Obradović N, Filipović S, Bykov AI, Vasil'kovskaya MA, Klochkov LA, Timofeeva II. Formation of magnesium titanates. in Powder Metallurgy and Metal Ceramics. 2009;48(7-8):371-374.
doi:10.1007/s11106-009-9157-0
https://hdl.handle.net/21.15107/rcub_dais_3459 .

Ristić, Momčilo M., Obradović, Nina, Filipović, Suzana, Bykov, A. I., Vasil'kovskaya, M. A., Klochkov, L. A., Timofeeva, I. I., "Formation of magnesium titanates" in Powder Metallurgy and Metal Ceramics, 48, no. 7-8 (2009):371-374,
https://doi.org/10.1007/s11106-009-9157-0 .,
https://hdl.handle.net/21.15107/rcub_dais_3459 .