Poster presented at the III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 201

Filipović, Suzana

Kachlik, Martin

Kosanović, Darko

Maca, Karel

Mitrić, Miodrag

Obradović, Nina

Paunović, Vesna

Pavlović, Vladimir B.

Pouchly, V.

VinaR - Repository of the Vinča Institute of Nuclear Sciences

Properties of magnesium titanate ceramic obtained by  
two stage sintering 
  
S. Filipovic1, N. Obradovic1, V. B. Pavlovic1, D. Kosanovic1, M. Mitric2, V. Paunovic3,  
V. Pouchly4, M. Kachlik4, K. Maca4 
1 Institute of Technical Science of SASA, 11000 Belgrade, Serbia, 
2 “Vinča” Institute of Nuclear Sciences, University of Belgrade, 11001 Belgrade, Serbia, 
3 Faculty for Electronics, University of Nis, 18000 Nis, Serbia, 
4 CEITEC BUT, Brno University of Technology, Technicka 10, 61600 Brno, Czech Republic 
  
  Abstract 
  
        The aim of this paper was investigation of 
structural and electrical properties of magnesium 
titanate ceramic obtained mechanochemically and 
subjected to two stage sintering process. Mixtures 
of MgO and TiO2 were treated in a planetary ball 
mill for several time intervals ranging from 0 to 
160 minutes. Powders prepared in this way were 
two stage sintered, at 1400 oC in air in the first 
stage, and then post-sintered by pressure assisted 
technique Hot Isostatic Pressing (HIP) at 1280 oC in 
argon atmosphere with a pressure of 200 MPa. X-
ray diffraction was performed in order to 
established phase composition of obtained 
ceramics. Densities of sintered samples were 
measured by Archimedes method. The values ​​of 
density were over 96 % of theoretical one and pure 
MgTiO3 phase was observed. Morphology of 
sintered bodies was investigated by SEM, and 
micrographs indicate the final sintering stage and 
very dense ceramics. Electrical measurements were 
performed in the microwave field of frequency. 
 
Fig. 1. X-Ray diffraction patterns 
MT0- MgTiO3, MgO, MgTi2O5 
MT10- MgTiO3(96,5%), MgTi2O5(3,5%) 
MT40- MgTiO3(100%) 
MT80- MgTiO3(100%) 
MT160- MgTiO3(83%), MgTi2O5(17%) 
 
 
 
MT10 
-Close porosity  
-Small dots 
-Rest of other phase 
 
-Sintering of agglomerates, polygonal shaped 
pores because of agglomerates presence 
- Compact structure with closed 
spherical pores 
 
-Compact structure with some rare closed 
pores 
MT40 
Electrical properties at frequency of 1GHz 
MT80 MT160 
Fig. 2. SEM micrographes of sintered samples 
Relative and absolute densities of samples 
sintered by HIP at 1280°C for 3 h in Ar. 
ε r 
 
Q 
MT0 37,3 1,3 
MT10 
 
35,8 2,8 
MT40 59,5 2,9 
MT80 36,6 2,4 
MT160 54,9 2,7 
ε r 
 
Q 
MT0 23,5 1,0 
MT10 43,7 1,4 
MT40 44,5 4,4 
MT80 41,8 1,3 
MT160 40,1 4,6 
Electrical properties at frequency of 2,5 GHz 
Conclusion 
 
          Two-stage sintered ceramics obtained shows extremely high density, over 96% for samples activated 160 minutes. X-ray diffraction 
pattern shows that pure MgTiO3 phase is present in green bodies activated for 40 and 80 minutes. Presence of closed porosity, seen at SEM 
micrographs, along with pores of spherical shape suggests the final stage of sintering. Comparing the values of εr and Q we can conclude that 
the best values reach a sample MT40. It is because presence of second phase in others samples (MgTi2O5) produces lower values of investigated 
electrical properties.  
 


Properties of Magnesium Titanate Ceramic Obtained by Two Stage Sintering

The aim of this paper was investigation of structural and electrical properties of magnesium titanate ceramic obtained mechanochemically and subjected to two stage sintering process. Mixtures of MgO and TiO2 were treated in a planetary ball mill for several time intervals ranging from 0 to 160 minutes. Powders prepared in this way were two stage sintered, at 1400 °C in air in the first stage, and then post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 °C in argon atmosphere with a pressure of 200 MPa. X-ray diffraction was performed in order to established phase composition of obtained ceramics. Densities of sintered samples were measured by Archimedes method. The values of density were over 96 % of theoretical one and pure MgTiO3 phase was observed. Morphology of sintered bodies was investigated by SEM, and micrographs indicate the final sintering stage and very dense ceramics. Electrical measurements were performed in the microwave field of frequency

Serbian Academy of Science and Arts Digital Archive (DAIS)

   Serbian Ceramic Society Conference ADVANCED CERAMICS AND APPLICATION III New Frontiers in Multifunctional Material Science and Processing                 Serbian Ceramic Society Institute of Technical Sciences of SASA Institute of Chemistry Technology and Metallurgy Institute of Physics Institute for Technology of Nuclear and Other Raw Mineral Materials Institute for Testing of Materials  Archeological Institute of SASA     PROGRAM AND THE BOOK OF ABSTRACTS                    Serbian Academy of Sciences and Arts, Knez Mihailova 35 Sep 29th - Oct 1st, 2014, Belgrade, Serbia    Book title: Serbian Ceramic Society Conference - ADVANCED CERAMICS AND APPLICATION III: Program and the Book of Abstracts   Publisher: Serbian Ceramic Society  Editors: Prof.dr Vojislav Mitić Prof. dr Olivera Milošević Dr Nina Obradovic Dr Lidija Mančić  Technical Editor: Prof. dr Olivera Milošević  Printing:  Serbian Academy of Sciences and Arts,  Knez Mihailova 35, Belgrade Format Pop Lukina 15, Belgrade   Edition:  150 copies  Sculptural Concretes: Rajko D. Blažić,  High School-Academy for Arts and Conservation, Serbian Ortodox Church, Belgrade, Serbia  CIP - Каталогизација у публикацији Народна библиотека Србије, Београд  666.3/.7(048) 66.017/.018(048)  SERBIAN Ceramic Society (Belgrade). Conference (3rd ; 2014 ; Beograd) Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014 ; [organized by] Serbian Ceramic Society ... [et al.] ; [editors Vojislav Mitić ... et al.]. - Belgrade : Serbian Ceramic Society, 2014 (Belgrade : Serbian Academy of Sciences and Arts). – 139 str. ; 30 cm  Tiraž 150.  ISBN 978-86-915627-2-4  1. Serbian Ceramic Society (Belgrade) a) Керамика - Апстракти b) Наука о         материјалима - Апстракти c) Наноматеријали  - Апстракти  COBISS.SR-ID 209985036 The Third Serbian Ceramic Society Conference »Advanced Ceramics and Application III« September 29-October 1, 2014, Serbian Academy of Sciences and Arts, Knez Mihailova 35, Belgrade, Serbia   118  PS2-36  Properties of Magnesium Titanate Ceramic Obtained by Two Stage Sintering  S. Filipovic1, N. Obradovic1, V. B. Pavlovic1, D. Kosanovic1, M. Mitric2, V. Paunovic3,  V. Pouchly4, M. Kachlik4, K. Maca4  1Institute of Technical Science of SASA, 11000 Belgrade, Serbia 2“Vinča” Institute of Nuclear Sciences, University of Belgrade, 11001 Belgrade, Serbia 3Faculty for Electronics, University of Nis, 18000 Nis, Serbia 4 CEITEC BUT, Brno University of Technology, Technicka 10, 61600 Brno, Czech Republic   The aim of this paper was investigation of structural and electrical properties of magnesium titanate ceramic obtained mechanochemically and subjected to two stage sintering process. Mixtures of MgO and TiO2 were treated in a planetary ball mill for several time intervals ranging from 0 to 160 minutes. Powders prepared in this way were two stage sintered, at 1400 oC in air in the first stage, and then post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 oC in argon atmosphere with a pressure of 200 MPa. X-ray diffraction was performed in order to established phase composition of obtained ceramics. Densities of sintered samples were measured by Archimedes method. The values of density were over 96 % of theoretical one and pure MgTiO3 phase was observed. Morphology of sintered bodies was investigated by SEM, and micrographs indicate the final sintering stage and very dense ceramics. Electrical measurements were performed in the microwave field of frequency.   

English

The aim of this paper was investigation of structural and electrical properties of magnesium titanate ceramic obtained mechanochemically and subjected to two stage sintering process. Mixtures of MgO and TiO2 were treated in a planetary ball mill for several time intervals ranging from 0 to 160 minutes. Powders prepared in this way were two stage sintered, at 1400 °C in air in the first stage, and then post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 °C in argon atmosphere with a pressure of 200 MPa. X-ray diffraction was performed in order to established phase composition of obtained ceramics. Densities of sintered samples were measured by Archimedes method. The values of density were over 96 % of theoretical one and pure MgTiO3 phase was observed. Morphology of sintered bodies was investigated by SEM, and micrographs indicate the final sintering stage and very dense ceramics. Electrical measurements were performed in the microwave field of frequency.III Serbian Ceramic Society Conference - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts; September 29 - October 1, 2014; Belgrad

Repository of the Vinča Nuclear Institute (VinaR)

 
 
 
Serbian Ceramic Society Conference 
ADVANCED CERAMICS AND APPLICATION III 
New Frontiers in Multifunctional Material Science and Processing 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Serbian Ceramic Society 
Institute of Technical Sciences of SASA 
Institute of Chemistry Technology and Metallurgy 
Institute of Physics 
Institute for Technology of Nuclear and Other Raw Mineral Materials 
Institute for Testing of Materials 
 Archeological Institute of SASA 
 
 
 
 
PROGRAM AND THE BOOK OF ABSTRACTS 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Serbian Academy of Sciences and Arts, Knez Mihailova 35 
Sep 29th - Oct 1st, 2014, Belgrade, Serbia 
 
 
 
Book title: Serbian Ceramic Society Conference - ADVANCED CERAMICS AND 
APPLICATION III: Program and the Book of Abstracts  
 
Publisher: 
Serbian Ceramic Society 
 
Editors: 
Prof.dr Vojislav Mitić 
Prof. dr Olivera Milošević 
Dr Nina Obradovic 
Dr Lidija Mančić 
 
Technical Editor: 
Prof. dr Olivera Milošević 
 
Printing:  
Serbian Academy of Sciences and Arts,  
Knez Mihailova 35, Belgrade 
Format 
Pop Lukina 15, Belgrade  
 
Edition:  
150 copies 
 
Sculptural Concretes: Rajko D. Blažić,  High School-Academy for Arts and Conservation, Serbian 
Ortodox Church, Belgrade, Serbia 
 
CIP - Каталогизација у публикацији 
Народна библиотека Србије, Београд 
 
666.3/.7(048) 
66.017/.018(048) 
 
SERBIAN Ceramic Society (Belgrade). Conference (3rd ; 2014 ; Beograd) Advanced Ceramics and 
Application : new frontiers in multifunctional material science and processing : program and the 
book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, 
Belgrade, 2014 ; [organized by] Serbian Ceramic Society ... [et al.] ; [editors Vojislav Mitić ... et 
al.]. - Belgrade : Serbian Ceramic Society, 2014 (Belgrade : Serbian Academy of Sciences and 
Arts). – 139 str. ; 30 cm 
 
Tiraž 150. 
 
ISBN 978-86-915627-2-4 
 
1. Serbian Ceramic Society (Belgrade) 
a) Керамика - Апстракти b) Наука о         
материјалима - Апстракти c) Наноматеријали  
- Апстракти 
 
COBISS.SR-ID 209985036 
The Third Serbian Ceramic Society Conference »Advanced Ceramics and Application III« 
September 29-October 1, 2014, Serbian Academy of Sciences and Arts, Knez Mihailova 35, 
Belgrade, Serbia 
 
 
118 
 
PS2-36 
 
Properties of Magnesium Titanate Ceramic Obtained by Two Stage 
Sintering 
 
S. Filipovic
1
, N. Obradovic
1
, V. B. Pavlovic
1
, D. Kosanovic
1
, M. Mitric
2
, V. Paunovic
3
,  
V. Pouchly
4
, M. Kachlik
4
, K. Maca
4 
 
1
Institute of Technical Science of SASA, 11000 Belgrade, Serbia 
2“Vinča” Institute of Nuclear Sciences, University of Belgrade, 11001 Belgrade, Serbia 
3
Faculty for Electronics, University of Nis, 18000 Nis, Serbia 
4
 CEITEC BUT, Brno University of Technology, Technicka 10, 61600 Brno, Czech Republic 
 
 
The aim of this paper was investigation of structural and electrical properties of magnesium 
titanate ceramic obtained mechanochemically and subjected to two stage sintering process. 
Mixtures of MgO and TiO2 were treated in a planetary ball mill for several time intervals 
ranging from 0 to 160 minutes. Powders prepared in this way were two stage sintered, at 1400 
o
C in air in the first stage, and then post-sintered by pressure assisted technique Hot Isostatic 
Pressing (HIP) at 1280 
o
C in argon atmosphere with a pressure of 200 MPa. X-ray diffraction 
was performed in order to established phase composition of obtained ceramics. Densities of 
sintered samples were measured by Archimedes method. The values of density were over 96 
% of theoretical one and pure MgTiO3 phase was observed. Morphology of sintered bodies 
was investigated by SEM, and micrographs indicate the final sintering stage and very dense 
ceramics. Electrical measurements were performed in the microwave field of frequency. 
  


Digital Repository of the Institute of Technical Sciences of SASA

Properties of magnesium titanate ceramic obtained by  two stage sintering   S. Filipovic1, N. Obradovic1, V. B. Pavlovic1, D. Kosanovic1, M. Mitric2, V. Paunovic3,  V. Pouchly4, M. Kachlik4, K. Maca4 1 Institute of Technical Science of SASA, 11000 Belgrade, Serbia, 2 “Vinča” Institute of Nuclear Sciences, University of Belgrade, 11001 Belgrade, Serbia, 3 Faculty for Electronics, University of Nis, 18000 Nis, Serbia, 4 CEITEC BUT, Brno University of Technology, Technicka 10, 61600 Brno, Czech Republic     Abstract           The aim of this paper was investigation of structural and electrical properties of magnesium titanate ceramic obtained mechanochemically and subjected to two stage sintering process. Mixtures of MgO and TiO2 were treated in a planetary ball mill for several time intervals ranging from 0 to 160 minutes. Powders prepared in this way were two stage sintered, at 1400 oC in air in the first stage, and then post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 oC in argon atmosphere with a pressure of 200 MPa. X-ray diffraction was performed in order to established phase composition of obtained ceramics. Densities of sintered samples were measured by Archimedes method. The values ​​of density were over 96 % of theoretical one and pure MgTiO3 phase was observed. Morphology of sintered bodies was investigated by SEM, and micrographs indicate the final sintering stage and very dense ceramics. Electrical measurements were performed in the microwave field of frequency.  Fig. 1. X-Ray diffraction patterns MT0- MgTiO3, MgO, MgTi2O5 MT10- MgTiO3(96,5%), MgTi2O5(3,5%) MT40- MgTiO3(100%) MT80- MgTiO3(100%) MT160- MgTiO3(83%), MgTi2O5(17%)    MT10 -Close porosity  -Small dots -Rest of other phase  -Sintering of agglomerates, polygonal shaped pores because of agglomerates presence - Compact structure with closed spherical pores  -Compact structure with some rare closed pores MT40 Electrical properties at frequency of 1GHz MT80 MT160 Fig. 2. SEM micrographes of sintered samples Relative and absolute densities of samples sintered by HIP at 1280°C for 3 h in Ar. ε r  Q MT0 37,3 1,3 MT10  35,8 2,8 MT40 59,5 2,9 MT80 36,6 2,4 MT160 54,9 2,7 ε r  Q MT0 23,5 1,0 MT10 43,7 1,4 MT40 44,5 4,4 MT80 41,8 1,3 MT160 40,1 4,6 Electrical properties at frequency of 2,5 GHz Conclusion            Two-stage sintered ceramics obtained shows extremely high density, over 96% for samples activated 160 minutes. X-ray diffraction pattern shows that pure MgTiO3 phase is present in green bodies activated for 40 and 80 minutes. Presence of closed porosity, seen at SEM micrographs, along with pores of spherical shape suggests the final stage of sintering. Comparing the values of εr and Q we can conclude that the best values reach a sample MT40. It is because presence of second phase in others samples (MgTi2O5) produces lower values of investigated electrical properties.   

Properties of Magnesium Titanate Ceramic Obtained by Two Stage Sintering

Abstract

Similar works

Full text

Available Versions

VinaR - Repository of the Vinča Institute of Nuclear Sciences

Serbian Academy of Science and Arts Digital Archive (DAIS)

Repository of the Vinča Nuclear Institute (VinaR)

VinaR - Repository of the Vinča Institute of Nuclear Sciences

Digital Repository of the Institute of Technical Sciences of SASA

Serbian Academy of Science and Arts Digital Archive (DAIS)

AgroSpace

Repository of the Vinča Nuclear Institute (VinaR)

Digital Repository of the Institute of Technical Sciences of SASA