Title

Microwave synthesis of homogeneous YAG nanopowder leading to a transparent ceramic

RIS ID

31482

Publication Details

Wang, J., Zheng, S., Zeng, R., Dou, S. Sun, X. (2009). Microwave synthesis of homogeneous YAG nanopowder leading to a transparent ceramic. Journal of the American Ceramic Society, 92 (6), 1217-1223.

Abstract

A homogeneous and extremely fine yttrium aluminum garnet (YAG) precursor powder was synthesized from solutions with a low [urea]/[metal ions] ratio under microwave irradiation, and pure phase YAG was directly crystallized from it at 1173 K. In the presence of sulfate ions, a fibrillar precursor that takes on a dendritic skeleton was generated, and easily dispersible YAG nanopowder with a particle size of 20–30 nm was obtained at 1373 K. A transparent YAG ceramic with fine grains was sintered from this YAG nanopowder at 1973 K for 10 min in a graphite furnace. At the wavelength of 1060 nm, the in-line light transmittance of the YAG ceramic is up to 67%. The mechanism behind the influence of the microwave irradiation and sulfate ions on the characteristics of YAG is thoroughly discussed.

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Link to publisher version (DOI)

http://dx.doi.org/10.1111/j.1551-2916.2009.03086.x