Paper Titles
Innovation in SiAlON Ceramics
p.137
Seeds Innovation and Bearing Applications of Silicon Nitride Ceramics
p.147
Recent Developments in SiAlON Research in New Zealand
p.153
Ca-SiAlON Glasses: Effects of Fluorine on Glass Formation and Properties
p.165
Development of SiAlON - From Mechanical to Optical Applications
p.173
The Effect of SiAlON Precursor Nanostructurization in a Planetary Mill on the Properties of Sintered Ceramics
p.179
Effect of Diluents on Post-Reaction Sintering of Silicon Nitride Ceramics
p.185
Plastic Deformation of Silicon Nitride Nano-Ceramics
p.189
Synthesis and Microstructural Evaluation of SiC-AlN Composites
p.193

Development of SiAlON - From Mechanical to Optical Applications

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Abstract:

Various rare-earth-doped α-SiAlON powders with high purity were prepared to study mechanical and optical properties of SiAlON-based functional materials in connection with ionic radius and electronic structure of rare-earth elements. Single phase rare-earth-doped α-SiAlON powders were obtained at a temperature as low as 1873 K by heating powder mixtures of rare-earth oxide, AlN and highly active ultrafine amorphous Si3N4. Bending strength of highly dense rare-earth-doped α/β-SiAlON-based ceramics was increased with decreasing radii of rare-earth ions, i.e., Yb-SiAlON-based ceramics exhibited excellent high-temperature strength and oxidation resistance caused by the small ionic radius of ytterbium. As for optical application, α-SiAlON is an excellent host lattice with good thermal and chemical stability for doping rare-earth element which activates photoluminescence. Europium-doped Ca-α-SiAlON phosphor formulated as CaxEuy(Si,Al)12(O,N)16 (where 0

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Innovation in Ceramic Science and Engineering View Preview

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Periodical:

Key Engineering Materials (Volume 352)

Pages:

173-178

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.352.173

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Online since:

August 2007

Authors:

Tetsuo Yamada, Takeshi Yamao, Shinichi Sakata

Keywords:

Emission, Mechanical Property, Oxidation Resistance, Oxynitride, Phosphor, Photoluminescence (PL), ß-SiAlON, Strength

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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