TY  - JOUR
AU  - Branković, Zorica
AU  - Milošević, Olivera
AU  - Poleti, Dejan
AU  - Karanović, Ljiljana C.
AU  - Uskoković, D
PY  - 2000
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/55
AB  - ZnO varistors with non-linearity coefficients reaching 50 and low values of the leakage current (similar to0.01 A/m(2)), were obtained by a method referred to as "direct mixing of constituent phases". The method is based on sintering of a mixture of the constituent phases with the following compositions: ZnO phase uniformly doped with Co2+ and Mn2+; intergranular phase: gamma -Bi2O3 stabilized with Mn2+ or Zn2+; spinel phase: Zn1.971Ni0.090Co0.030Cr0.247Mn0.090Sb0.545O4 AS proved, the obtained varistors are composed of the same phases as those introduced into the system. The influence of composition as well as milling and sintering parameters on the varistor characteristics were investigated. Some varistor powder mixtures were intensively milled before sintering. As a result, high density ceramics with higly homogeneous microstructure were obtained after sintering.
PB  - Japan Inst Metals & Materials, Sendai
T2  - Materials Transactions Jim
T1  - ZnO varistors prepared by direct mixing of constituent phases
EP  - 1231
IS  - 9
SP  - 1226
VL  - 41
DO  - 10.2320/matertrans1989.41.1226
ER  - 

@article{
author = "Branković, Zorica and Milošević, Olivera and Poleti, Dejan and Karanović, Ljiljana C. and Uskoković, D",
year = "2000",
abstract = "ZnO varistors with non-linearity coefficients reaching 50 and low values of the leakage current (similar to0.01 A/m(2)), were obtained by a method referred to as "direct mixing of constituent phases". The method is based on sintering of a mixture of the constituent phases with the following compositions: ZnO phase uniformly doped with Co2+ and Mn2+; intergranular phase: gamma -Bi2O3 stabilized with Mn2+ or Zn2+; spinel phase: Zn1.971Ni0.090Co0.030Cr0.247Mn0.090Sb0.545O4 AS proved, the obtained varistors are composed of the same phases as those introduced into the system. The influence of composition as well as milling and sintering parameters on the varistor characteristics were investigated. Some varistor powder mixtures were intensively milled before sintering. As a result, high density ceramics with higly homogeneous microstructure were obtained after sintering.",
publisher = "Japan Inst Metals & Materials, Sendai",
journal = "Materials Transactions Jim",
title = "ZnO varistors prepared by direct mixing of constituent phases",
pages = "1231-1226",
number = "9",
volume = "41",
doi = "10.2320/matertrans1989.41.1226"
}

Branković, Z., Milošević, O., Poleti, D., Karanović, L. C.,& Uskoković, D.. (2000). ZnO varistors prepared by direct mixing of constituent phases. in Materials Transactions Jim
Japan Inst Metals & Materials, Sendai., 41(9), 1226-1231.
https://doi.org/10.2320/matertrans1989.41.1226

Branković Z, Milošević O, Poleti D, Karanović LC, Uskoković D. ZnO varistors prepared by direct mixing of constituent phases. in Materials Transactions Jim. 2000;41(9):1226-1231.
doi:10.2320/matertrans1989.41.1226 .

Branković, Zorica, Milošević, Olivera, Poleti, Dejan, Karanović, Ljiljana C., Uskoković, D, "ZnO varistors prepared by direct mixing of constituent phases" in Materials Transactions Jim, 41, no. 9 (2000):1226-1231,
https://doi.org/10.2320/matertrans1989.41.1226 . .

TY  - JOUR
AU  - Ignjatović, Nenad
AU  - Branković, Zorica
AU  - Dramicanin, M
AU  - Nedeljković, Jovan M.
AU  - Uskoković, D
PY  - 1998
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/43
AB  - TiO2 and ZnO thin films were prepared by dip-coating method from TiCl4, and Zn(NO3)(2) precursor solutions, respectively. Basic parameters of the process such as temperature of thermal treatment, heating and cooling regimes, and number of cycles required for obtaining uniformly coated substrates were defined. Microstructural analysis showed that at least 20 cycles must be repeated to obtain a completely covered substrate and continual film of TiO2 at 823 K. In the case of TiO2 film thermally treated at 723 K even n=30 was not enough to produce a continual film. Preparation of continual film of ZnO requires at least n=22, at 773 K. Microstructure and roughness of the prepared films were investigated by AFM method.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Advanced Materials and Processes: Yucomat Ii
T1  - Preparation of TiO2 and ZnO thin films by dip-coating method
EP  - 152
SP  - 147
VL  - 282-2
DO  - 10.4028/www.scientific.net/MSF.282-283.147
ER  - 

@article{
author = "Ignjatović, Nenad and Branković, Zorica and Dramicanin, M and Nedeljković, Jovan M. and Uskoković, D",
year = "1998",
abstract = "TiO2 and ZnO thin films were prepared by dip-coating method from TiCl4, and Zn(NO3)(2) precursor solutions, respectively. Basic parameters of the process such as temperature of thermal treatment, heating and cooling regimes, and number of cycles required for obtaining uniformly coated substrates were defined. Microstructural analysis showed that at least 20 cycles must be repeated to obtain a completely covered substrate and continual film of TiO2 at 823 K. In the case of TiO2 film thermally treated at 723 K even n=30 was not enough to produce a continual film. Preparation of continual film of ZnO requires at least n=22, at 773 K. Microstructure and roughness of the prepared films were investigated by AFM method.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Advanced Materials and Processes: Yucomat Ii",
title = "Preparation of TiO2 and ZnO thin films by dip-coating method",
pages = "152-147",
volume = "282-2",
doi = "10.4028/www.scientific.net/MSF.282-283.147"
}

Ignjatović, N., Branković, Z., Dramicanin, M., Nedeljković, J. M.,& Uskoković, D.. (1998). Preparation of TiO2 and ZnO thin films by dip-coating method. in Advanced Materials and Processes: Yucomat Ii
Trans Tech Publications Ltd, Durnten-Zurich., 282-2, 147-152.
https://doi.org/10.4028/www.scientific.net/MSF.282-283.147

Ignjatović N, Branković Z, Dramicanin M, Nedeljković JM, Uskoković D. Preparation of TiO2 and ZnO thin films by dip-coating method. in Advanced Materials and Processes: Yucomat Ii. 1998;282-2:147-152.
doi:10.4028/www.scientific.net/MSF.282-283.147 .

Ignjatović, Nenad, Branković, Zorica, Dramicanin, M, Nedeljković, Jovan M., Uskoković, D, "Preparation of TiO2 and ZnO thin films by dip-coating method" in Advanced Materials and Processes: Yucomat Ii, 282-2 (1998):147-152,
https://doi.org/10.4028/www.scientific.net/MSF.282-283.147 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Poleti, Dejan
AU  - Karanović, Ljiljana C.
AU  - Uskoković, D
PY  - 1998
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/44
AB  - The method of directed synthesis of the constituent phases (DSCP) was applied to investigate the influence of spinel phase composition on characteristics of ZnO varistors. Six varistor mixtures differing only in chemical composition of the spinel phase were prepared. The phase ratio as well as the compositions of ZnO and intergranular gamma-Bi2O3 phases were the same in all samples. Characterization of prepared varistors was performed by X-ray diffraction, SEM and electrical measurements. It was shown that it is possible, in certain cases, to estimate additive redistribution taking into account changes in lattice constants of ZnO, spinel phases and varistor composition. Comparison of six different raristor mixtures shows that it is possible to reduce the number of components of the system if all main constituents of the varistor microstructure are still present. Results confirmed advantages of the DSCP method in preparation of varistors of required phase composition and properties.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Advanced Materials and Processes: Yucomat Ii
T1  - Influence of spinel phase composition on ZnO varistors properties
EP  - 232
SP  - 225
VL  - 282-2
DO  - 10.4028/www.scientific.net/MSF.282-283.225
ER  - 

@article{
author = "Branković, Zorica and Poleti, Dejan and Karanović, Ljiljana C. and Uskoković, D",
year = "1998",
abstract = "The method of directed synthesis of the constituent phases (DSCP) was applied to investigate the influence of spinel phase composition on characteristics of ZnO varistors. Six varistor mixtures differing only in chemical composition of the spinel phase were prepared. The phase ratio as well as the compositions of ZnO and intergranular gamma-Bi2O3 phases were the same in all samples. Characterization of prepared varistors was performed by X-ray diffraction, SEM and electrical measurements. It was shown that it is possible, in certain cases, to estimate additive redistribution taking into account changes in lattice constants of ZnO, spinel phases and varistor composition. Comparison of six different raristor mixtures shows that it is possible to reduce the number of components of the system if all main constituents of the varistor microstructure are still present. Results confirmed advantages of the DSCP method in preparation of varistors of required phase composition and properties.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Advanced Materials and Processes: Yucomat Ii",
title = "Influence of spinel phase composition on ZnO varistors properties",
pages = "232-225",
volume = "282-2",
doi = "10.4028/www.scientific.net/MSF.282-283.225"
}

Branković, Z., Poleti, D., Karanović, L. C.,& Uskoković, D.. (1998). Influence of spinel phase composition on ZnO varistors properties. in Advanced Materials and Processes: Yucomat Ii
Trans Tech Publications Ltd, Durnten-Zurich., 282-2, 225-232.
https://doi.org/10.4028/www.scientific.net/MSF.282-283.225

Branković Z, Poleti D, Karanović LC, Uskoković D. Influence of spinel phase composition on ZnO varistors properties. in Advanced Materials and Processes: Yucomat Ii. 1998;282-2:225-232.
doi:10.4028/www.scientific.net/MSF.282-283.225 .

Branković, Zorica, Poleti, Dejan, Karanović, Ljiljana C., Uskoković, D, "Influence of spinel phase composition on ZnO varistors properties" in Advanced Materials and Processes: Yucomat Ii, 282-2 (1998):225-232,
https://doi.org/10.4028/www.scientific.net/MSF.282-283.225 . .