TEM analysis of grain boundary phase in Mn-Zn ferrites

Takafumi Satoh, Etsuo Otsuki

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    A control of nano-structure in sintering process is necessary to decrease the power loss of Mn-Zn ferrites. The purpose of this paper is to investigate the forming process of nano-structure during sintering as well as the structural change of spinel matrix and grain boundary which are affected by the oxygen partial pressure of sintering atmosphere by using High-Resolution Transmission Electron Microscopy (HRTEM). As a result, it was revealed by the TEM images (bright, dark-field and lattice-fringe images) and the electron diffraction analyses that the thickness of the grain boundary layers was found to increase with increasing oxygen partial pressure of sintering atmosphere. And the reduction of power loss by adding SiO2 and CaO is thought of due to the formation of highly resisitive grain boundary layers.

    Original languageEnglish
    Pages (from-to)1393-1398
    Number of pages6
    JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
    Volume43
    Issue number12
    DOIs
    Publication statusPublished - 1996 Dec

    Keywords

    • Grain boundary layer
    • HRTEM
    • Mn-Zn ferrite
    • Nano-structure
    • TEM image

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Metals and Alloys
    • Materials Chemistry

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