@conference{
author = "Đorđević, Nataša and Obradović, Nina and Sokić, Miroslav D. and Marković, Branislav and Patarić, Aleksandra and Petronijević, Nela",
year = "2019",
abstract = "The influence of Bi2O3 as a functional additive on the process of obtaining cordierite, 2MgO-2Al2O3-5SiO2 (MAS) was studied by sintering the MgO / Bi2O3 system (sintered at 820 °C and 1100 °C), Al2O3 / Bi2O3 and SiO2 / Bi2O3 (sintered at 1100 °C ), the composition being 80% oxide and 20% Bi2O3. The effects of sintering, composition, and morphology were followed by X-ray diffraction, scanning electron microscopy and EDS analysis. It has been found that, in addition to the liquid phase, Bi2O3 produces intermediate metastable compounds with MgO and Al2O3. The sintering of MAS ceramics with 10% Bi2O3 at 1000 °C, 1100 °C and 1200 °C was also performed. Binary systems MgO / Bi2O3 at 820 ºC and 1100 ºC, Al2O3 / Bi2O3 and SiO2 / Bi2O3 were sintered at 1100 ºC, as well as MgO, Al2O3, SiO2 / Bi2O3 at 1000 ºC, 1100 ºC and 1200 ºC to examine the reaction of the cordierite synthesis. The results show the formation of a liquid phase at 820 °C (melting temperature Bi2O3), as well as the formation of metastable compounds forming MgO and Al2O3 with Bi2O3 at 1100 °C and which diffuse through the liquid phase, thus enabling the mechanism of reaction in the multi-component system to be accelerated from two aspects. By the sintering of a three-component MAS system in the presence of Bi2O3, the existence of cordierite was established. The lowest temperature at which the tracer cordierite was observed (in hexagonal form - indialite) is 1100 °C, while in the sintered system at 1200 ºC the most frequent phase is indialite. This study found that the presence of Bi2O3 in basic cordierite mixture allows the sintering temperature to decrease by ~ 170 ºC relative to the temperature of the formation of cordierite ceramics from the mixture without the presence of functional additives.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia (AMES)",
journal = "Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia",
title = "Bi2O3 influence on electronic ceramics sintering process and final properties",
pages = "60-60",
url = "https://hdl.handle.net/21.15107/rcub_dais_14866"
}