Magnetoceramics from the Bulk Pyrolysis of Polysilazane Cross-Linked by Polyferrocenylcarbosilanes with Hyperbranched Topology

    Authors

    J. Kong; M. M. Kong; X. F. Zhang; L. X. Chen;L. N. An

    Comments

    Authors: contact us about adding a copy of your work at [email protected]

    Abbreviated Journal Title

    ACS Appl. Mater. Interfaces

    Keywords

    magnetoceramics; polymeric precursors; hyperbranched; cross-linker; POLYMER-DERIVED CERAMICS; MAGNETIC-PROPERTIES; ORGANOMETALLIC POLYMERS; SILICON-CARBIDE; SICN; FIBERS; TEMPERATURE; FABRICATION; COMPOSITES; PRECURSOR; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary

    Abstract

    In this contribution, we report a novel strategy for the synthesis of nanocrystal-containing magnetoceramics with an ultralow hysteresis loss by the pyrolysis of commercial polysilazane cross-linked with a functional metallopolymer possessing hyperbranched topology. The usage of hyperbranched polyferrocenylcarbosilane offers either enhanced ceramic yield or magnetic functionality of pyrolyzed ceramics. The ceramic yield was enhanced accompanied by a decreased evolution of hydrocarbons and NH3 because of the cross-linking of precursors and the hyperbranched cross-linker. The nucleation of Fe5Si3 from the reaction of iron atoms with Si-C-N amorphous phase promoted the formation of alpha-Si3N4 and SiC crystals. After annealing at 1300 degrees C, stable Fe3Si crystals were generated from the transformation of the metastable Fe5Si3 phase. The nanocrystal-containing ceramics showed good ferromagnetism with an ultralow (close to 0) hysteresis loss. This method is convenient for the generation of tunable functional ceramics using a commercial polymeric precursor cross-linked by a metallopolymer with a designed topology.

    Journal Title

    Acs Applied Materials & Interfaces

    Volume

    5

    Issue/Number

    20

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    10367

    Last Page

    10375

    WOS Identifier

    WOS:000326212900069

    ISSN

    1944-8244

    Share

    COinS
     

    Accessibility Statement

    This item was created or digitized prior to April 24, 2027, or is a reproduction of legacy media created before that date. It is preserved in its original, unmodified state specifically for research, reference, or historical recordkeeping. In accordance with the ADA Title II Final Rule, the University Libraries provides accessible versions of archival materials upon request. To request an accommodation for this item, please submit an accessibility request form.