One-step hydrothermal synthesis of yttria-stabilized tetragonal zirconia polycrystalline nanopowders for blue-colored zirconia-cobalt aluminate spinel composite ceramics
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Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A novel approach for the preparation of blue-color giving zirconia nanopowders by doping of 3 mol% Y2O3 through simple one-step hydrothermal process is proposed. A blue-color giving yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) powders were prepared by urea-based solution, zirconium acetate, CoCl2 center dot 6H(2)O and AlCl3 precursors in hydrothermal vessel at 24 h, 150 degrees C and 20 bars. Based on the results, the synthesized bluecolor giving Y-TZP nanopowders have entirely tetragonal structure as mono phase with 3.8 +/- 0.2 nm average grain size and (Y, Co, Al)(x)ZrO2; x <= 0.03 at. with chemical composition. Thermal treatment was also applied to synthesized Y-TZP powders at 1200 degrees C and 1450 degrees C to observe the color evolution. Only sharp blue was obtained in Y-TZP powders resulting the development of zirconia-cobalt aluminate spinel (ZrO2-CoAl2O4) composite ceramic structure for both temperatures after heat-treatment. Herein, not only formation of CoAl2O4 but also incorporation of cobalt (Co) and aluminum (Al) into the Y-TZP grains plays a critical role on evolving of blue color. This synthesized Y-TZP nanopowders can be a good candidate for one-step production of blue-color sintered ZrO2-CoAl2O4 spinel composite ceramics in numerous ceramic applications due to their superior structural and functional properties.
Açıklama
Anahtar Kelimeler
Powders: chemical preparation, Electron microscopy, Microstructure-final, ZrO2
Kaynak
Ceramics International
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
45
Sayı
5
