Sintering characteristics of nano-sized yttria-stabilized zirconia powders prepared by spray pyrolysis
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Nano-sized Y2O3-stabilized ZrO2 (YSZ) powders were prepared by the spray pyrolysis of solutions containing citric acid and ethylenediaminetetraacetic acid. The resulting hollow particles were heated at between 600 and 900 ο C and planetary milled to nano-sized powders that showed mixed crystal structures of monoclinic, cubic, and tetragonal phases. Pellets formed from the YSZ powders had fine grains of below 1 µm after sintering at 1300 or 1400 ο C. Sintering at 1500 ο C led to large grains of 2.3 µm.
Abstract
Nano-sized Y2O3-stabilized ZrO2 (YSZ) powders were prepared by the spray pyrolysis of solutions containing citric acid and ethylenediaminetetraacetic acid. The resulting hollow particles were heated at between 600 and 900 ο C and planetary milled to nano-sized powders that showed mixed crystal structures of monoclinic, cubic, and tetragonal phases. Pellets formed from the YSZ powders had fine grains of below 1 µm after sintering at 1300 or 1400 ο C. Sintering at 1500 ο C led to large grains of 2.3 µm.
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