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SYNTHESIS AND CHARACTERIZATION OFSi3N4@Al(OH)3–Y(OH)3CORE-SHELL COMPOSITE PARTIC3LES

Author

Listed:
  • JIE-GUANG SONG

    (College of Materials Science and Engineering, Jiujiang University, Jiujiang 332005, China)

  • GANG-CHANG JI

    (College of Materials Science and Engineering, Jiujiang University, Jiujiang 332005, China)

  • SHI-BIN LI

    (College of Materials Science and Engineering, Jiujiang University, Jiujiang 332005, China)

  • LIAN-MENG ZHANG

    (State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China)

Abstract

Silicon nitride (Si3N4) has attracted substantial interest because of its extreme chemical and physical properties, but the sintering densification ofSi3N4is difficult, and it is easily oxidized in the high-temperature air to impact high-temperature strength, which restricts its applied range. In order to decrease the oxidization and improve the strength ofSi3N4at high temperature, the surface ofSi3N4is coated withAl(OH)3andY(OH)3to synthesisSi3N4@Al(OH)3–Y(OH)3core-shell composite particles. Through TEM, XRD, and BET analysis, when pH is about 9,Si3N4@Al(OH)3–Y(OH)3core-shell composite particles are successfully synthesized by co-precipitation methods. Coating layer is about 200 nm, which is compaction and conformability. Dispersion of coatedSi3N4withAl(OH)3andY(OH)3particles are very good. Synthesis ofSi3N4@Al(OH)3–Y(OH)3core-shell composite powder will lay the foundation for preparing high-performanceYAG/Si3N4multiphase ceramic materials.

Suggested Citation

  • Jie-Guang Song & Gang-Chang Ji & Shi-Bin Li & Lian-Meng Zhang, 2008. "SYNTHESIS AND CHARACTERIZATION OFSi3N4@Al(OH)3–Y(OH)3CORE-SHELL COMPOSITE PARTIC3LES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 15(05), pages 581-585.
    • Handle: RePEc:wsi:srlxxx:v:15:y:2008:i:05:n:s0218625x08011779
    DOI: 10.1142/S0218625X08011779
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