An impact of the molar ratio of Na2O/K2O on nanomechanical properties of glaze materials containing zirconium oxide

An impact of the molar ratio of Na2O/K2O on nanomechanical properties of glaze materials containing zirconium oxide

In this paper the nanomechanical properties of three groups of glass-ceramic materials were measured. The materials designated from the multicomponent system: SiO2-Al2O3-CaO-MgO-Na2O-K2O and the difference between them was the molar ratio of sodium oxide to potassium oxide, equal to, respectively 5....

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Bibliographic Details
Published in:Journal of alloys and compounds Vol. 815; p. 152411
Main Authors: Pasiut, Katarzyna, Partyka, Janusz, Bućko, Mirosław M., Grandys, Marek, Kurpaska, Łukasz, Piekarczyk, Wojciech
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 30-01-2020
Elsevier BV
Subjects:
Aluminum oxide
Ceramics industry
Chemical composition
Crystal structure
Crystallinity
Glass ceramics
Glass-ceramic materials
Mechanical properties
Nanomechanical properties
Organic chemistry
Phase composition
Potassium
Silicon dioxide
Sodium
Young’s modulus
Zirconium
Zirconium oxide
Zirconium oxides
Zirconium silicate
Young’s modulus
Zirconium silicate
Zirconium oxide
Nanomechanical properties
Glass-ceramic materials
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Summary:In this paper the nanomechanical properties of three groups of glass-ceramic materials were measured. The materials designated from the multicomponent system: SiO2-Al2O3-CaO-MgO-Na2O-K2O and the difference between them was the molar ratio of sodium oxide to potassium oxide, equal to, respectively 5.45; 1.19; and 0.77. Zirconium oxide was added to those materials, in three different amounts (1.5; 3; 6 wt%). The obtained materials were characterized by the XRD method. The materials were also observed by means of a scanning electron microscope. The chemical compositions of amorphous and crystalline phases were analyzed by the EDS measurements. It has been discovered that the amorphous phase contains small amounts of zirconium cations, which positively affect its mechanical properties as confirmed by the results of a nanomechanical study. In addition, the presence of zirconium silicate and zirconium oxides in the phase composition improves mechanical properties. It was also shown that the molar ratio of alkali oxides (sodium oxide to potassium oxide) influences the amount of crystalline phase, i.e. mainly zirconium silicate. Sodium oxide, in contrast to potassium oxide, promotes the formation of more crystals in the analyzed materials and improves nanomechanical properties. •The influence of Na2O/K2O molar ratio and added zirconium oxide on the presence of crystalline phases.•The influence of the addition of zirconium oxide on the nanomechanical properties.•The influence of Na2O/K2O molar ratio on the nanomechanical properties.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.152411