Ultra-long single-crystalline alpha-Si3N4 nanowires: Derived from a polymeric precursor

    Authors

    W. Y. Yang; Z. P. Xie; J. J. Li; H. Z. Miao; L. G. Zhang;L. N. An

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    CATALYST-ASSISTED PYROLYSIS; SILICON-NITRIDE; CARBON NANOTUBES; NANORODS; CERAMICS; CARBIDE; GROWTH; DENSE; Materials Science, Ceramics

    Abstract

    Single-crystalline alpha-Si3N4 nanowires were synthesized by thermal decomposition of a polysilazane preceramic polymer using FeCl2 powders as catalyst. The nanowires, which are 20-40 nm in diameter and up to several mm in length, possess smooth surfaces and uniform diameters along the entire length and contain no detectable structural defects such as dislocation or stacking faults. The study also revealed that all nanowires grow along |100| direction. The growth of the nanowires is attributed to a novel solid-liquid-gas-solid reaction/crystallization process. The mechanism that governs the formation of nanowires rather than nanobelts is discussed.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    88

    Issue/Number

    6

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    1647

    Last Page

    1650

    WOS Identifier

    WOS:000229410300050

    ISSN

    0002-7820

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