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SILICON-29 MAS-NMR AND ESR STUDY ON THE EFFECT OF HEAT TREATMENT ON THE STRUCTURE OFSiC−Si3N4COMPOSITE ULTRAFINE PARTICLES

Author

Listed:
  • MASAAKI SUZUKI

    (Hokkaido National Industrial Research Institute, 2–17–2–1, Tsukisamu-higashi, Toyohira-ku, Sapporo 062, Japan)

  • XINGGUO LI

    (Hokkaido National Industrial Research Institute, 2–17–2–1, Tsukisamu-higashi, Toyohira-ku, Sapporo 062, Japan;
    Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • YOSHINORI NAKATA

    (Hokkaido National Industrial Research Institute, 2–17–2–1, Tsukisamu-higashi, Toyohira-ku, Sapporo 062, Japan)

  • HIDEAKI NAGAI

    (Hokkaido National Industrial Research Institute, 2–17–2–1, Tsukisamu-higashi, Toyohira-ku, Sapporo 062, Japan)

  • TAKESHI OKUTANI

    (Hokkaido National Industrial Research Institute, 2–17–2–1, Tsukisamu-higashi, Toyohira-ku, Sapporo 062, Japan)

Abstract

The effect of heat treatment on the structure ofSiC−Si3N4composite ultrafine particles was studied by29SiMAS-NMR and ESR.29SiMAS-NMR and ESR results showed that the local structure changed a little below 1573 K, at which the XRD pattern did not change significantly, but slight increase in crystalline size were observed. When theSiC−Si3N4powder was heat-treated at 1773 K, most nitrogen atoms dissolved into β-SiC lattice were removed from theβ-SiClattice, and the remaining nitrogens were considered to exist in the boundary layer between SiC crystals asSiC3Nunit in the particle.

Suggested Citation

  • Masaaki Suzuki & Xingguo Li & Yoshinori Nakata & Hideaki Nagai & Takeshi Okutani, 1996. "SILICON-29 MAS-NMR AND ESR STUDY ON THE EFFECT OF HEAT TREATMENT ON THE STRUCTURE OFSiC−Si3N4COMPOSITE ULTRAFINE PARTICLES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 85-89.
  • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x9600019x
    DOI: 10.1142/S0218625X9600019X
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