Phase composition and morphology characteristics of ceria-stabilized zirconia powders obtained via sol-gel method with various pH conditions

• Autorzy: Nakonieczny D. S. , Paszenda Z. K. , Basiaga M. , Radko T. , Drewniak S. , Podwórny J. , Bogacz W.

Identyfikatory

DOI

10.5277/ABB-00621-2016-03

• Języki publikacji: EN

Abstrakty

EN

High purity, fine crystalline, degradation-free at low temperature powders have attracted special interest in CAD/CAM prosthetic dentistry full ceramic restorations. This study reports the preparation and characterisation of zirconia-ceria (0.9ZrO20.1CeO2) powders. Materials were obtained from zirconium-n-alkoxide and cerium nitrate hexahydrate in the pH 2–4 and 8–10. Methods: Zirconia-ceria powders were obtained with the sol-gel method in a humid-free environment. Thermal analysis (TGA/DTA) of the as-prepared materials was made for an assessment of its behaviour at elevated temperatures. Specimens were dried at 80°C and calcinated in two stages: at 300°C with soaking time 2.5 h and 850°C with holding time 2.5 h, in order to evaluate the phase transformations. Thermal analyses of the as-dried powders were made for an assessment of its thermal behaviour during heat treatment up to 1000 °C. By X-ray diffraction (XRD), polymorphs of ZrO2 were identified. Additionally, scanning electron microscopy (SEM) and laser particle size distribution (PSD) were involved for characterisation of morphology of the powders. Results: We found a correlation between the pH of the colloidal system and the morphology of the as-obtained powders. Based on analysis (SEM,PSD), structures were identified known as soft and hard agglomerates. Conclusions: In summary, it can be stated differences were found between powder morphology depending on the used pH, which can be crucial for powder densification during sintering and compacting green bodies which, as a consequence, may be crucial for the lifetime of zirconia prostheses. Correlations between phase composition and pH are difficult to grasp, and require further more sophisticated studies.

Słowa kluczowe

EN

sol-gel; bioceramics; zirconia; oxide dopants; thermal properties; powder morphology

PL

zol-żel; bioceramika; tlenek cyrkonu; właściwości termiczne; morfologia proszków

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2017
• Tom: Vol. 19, no. 2
• Strony: 21--30
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr.

Twórcy

autor

Nakonieczny D. S.

• Department of Biomaterials and Medical Devices Engineering, Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelt 40 st., 41-800 Zabrze, Poland

autor

Paszenda Z. K.

• Department of Biomaterials and Medical Devices Engineering, Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelt 40 st., 41-800 Zabrze, Poland

autor

Basiaga M.

• Department of Biomaterials and Medical Devices Engineering, Faculty of Biomedical Engineering, Silesian University of Technology, Roosevelt 40 st., 41-800 Zabrze, Poland

autor

Radko T.

• Institute for Chemical Processing of Coal, Zamkowa Str. 1, 41-803 Zabrze; Poland

autor

Drewniak S.

• Department of Optoelectronics, Silesian University of Technology, B. Krzywoustego st., 2, 44 100 Gliwice, Poland

autor

Podwórny J.

• Refractory Materials Division, Institute of Ceramics and Buildings Materials, Toszecka 99 st., 44-100 Gliwice, Poland

autor

Bogacz W.

• Department of Chemical Engineering and Process Design, Faculty of Chemistry, Silesian University of Technology, M. Strzody 7 st., 44-100 Gliwice, Poland

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).