XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
192
T1: P–59
The influence of the addition of zirconium oxide on the structure of raw
porcelain glazes
Katarzyna Pasiut
1
, Janusz Partyka
1
, Maciej Sitarz
1
, Magdalena Leśniak
1
,
Mirosław Bućko
1
, and Piotr Jeleń
1
1
AGH University of Science and Technology, Faculty of Materials Science and Ceramics,
al. A. Mickiewicza 30, 30-059 Kraków, Poland, e-mail: kpasiut@agh.edu.pl
The growing demands for the ceramic glazes create the necessity for more detailed research
on the influence of oxides on the properties of ready-prepared glazes. The complexity of multi
oxides systems of glazes causes difficulties in analysed this system and make some problems to
describe the influence of adding oxides on the glazes. The interaction between the single oxides
included in the composition of glaze should also be analysed. The presence of each oxides, even
in small amounts, could have a significant impact on properties of obtained glaze.
The structure of ceramic glazes for firing process between 1220 and 1240°C. The glazes
were characterised by a constant ratio molar of SiO
2
/Al
2
O
3
=3, CaO/MgO=1 and Na
2
O/K
2
O=1.
Zirconium oxide was added in three different amounts: 1.5; 3; 6; 12 and 24% (weight
percentage). The structure in these glazes was described based on the results from X-ray
analysis infrared spectroscopy (FIR, MIR) and Raman spectroscopy. The results of this research
present noticeable effect of added zirconium oxide on the structure of analysed glazes.
Keywords: zirconium oxide; glazes; glass-ceramic materials; Raman spectroscopy
Acknowledgment
This research work has been carried out thanks to financing in the framework of NCBiR (Polish National
Research and Development Committee) program PBS1/B5/17/2012.
XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
193
T1: P–60
Spectroscopic methods in the study of properties of ceramic glazes
Magdalena Leśniak
1
, Janusz Partyka
1
, and Maciej Sitarz
1
1
Faculty of Materials Science and Ceramics, AGH University of Science and Technology,
Mickiewicza 30 Ave., 30-059 Krakow, Poland, e-mail: mlesniak@agh.edu.pl
Ceramic glaze is coating of vitreous or glass-crystalline substance, which has been fused on
ceramic body through firing. Ceramic glazes must be matched to materials with different
chemical and physical properties, melted at different temperatures and showed specific final
properties, so there is a multitude of different glaze compositions [1, 2].
Ceramic glazes are silicate glasses due to the chemical composition. Knowledge of the glass
structure and the role of individual oxides can be used to characteristic of ceramic glazes. The
main components of the aluminosilicate ceramic glazes are silica (SiO
2
) and alumina (Al
2
O
3
),
which under certain conditions can be replaced silicon ions [3]. Zinc oxide (ZnO) is another
oxide often used in the production of ceramic glazes. Zinc oxide may be a flux, improved the
covering effect of glazes and crystallized as zinc silicate Zn
2
SiO
4
(crystalline glazes) [4]. The
basic problem in the design of zinc - aluminosilicate glazes is the lack in knowledge of the role
of zinc ions in structure of the ceramic glazes.
In this study, the influence of variable content of zinc oxide (0, 5,10,15 and 20 % wt.) on the
structure, microstructure and selected properties of aluminosilicate ceramic glazes, firing
temperature up to 1250°C, from SiO
2
-Al
2
O
3
-CaO-MgO-K
2
O-Na
2
O-ZnO system with variable
SiO
2
/Al
2
O
3
molar ratio (5–11) were examined. Analysis of the phase composition (XRD)
showed a variety. Amorphous (transparent) as well as glass-ceramic glazes (matte) were
obtained. Spectroscopic studies (FTIR, Raman spectroscopy, MAS NMR) have provided
information that zinc ions in the glassy phase of all glazes are modified ions.
The obtained data on the structure and microstructure of glazes were correlated with results
of thermal tests (DTA, DL, HSM). It allowed to define the properties of zinc-aluminosilicate
ceramic glazes at high temperature. The properties of glazes after firing have also been studied,
e.g. gloss, roughness, chemical resistance.
Keywords: ceramic glazes; ZnO; structure; microstructure; properties of glazes
Acknowledgment
This work was supported by the National Science Centre, Poland Grant No 2015/19/N/ST8/00486.
References
[1] D.R. Eppler, R.A. Eppler, Glazes and Glass Coatings, The American Ceramic Society, Westerville,
Ohio 2000.
[2] J.E. Shelby, Introduction to Glass Science and Technology, Athenaeum Press Ltd, UK, 1997.
[3] K.T. Bechgaard, G. Scannell, et al., J. Non-Cryst. Solid. 470 (2017) 145
[4] J. Partyka , M. Leśniak, Ceram. Int. 42 (2016) 8513.
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