Impedance spectroscopy study on polymer‐derived amorphous SiAl CO | Zendy

Cao Yejie | Zendy; Gao Yan | Zendy; An Linan | Zendy

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Impedance spectroscopy study on polymer‐derived amorphous SiAl CO

Author(s) -

Cao Yejie,

Gao Yan,

An Linan

Publication year - 2017

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/jace.14669

Subject(s) - pyrolysis , dielectric spectroscopy , ceramic , materials science , capacitance , phase (matter) , carbon fibers , amorphous solid , electrical impedance , relaxation (psychology) , composite material , chemical engineering , analytical chemistry (journal) , chemistry , organic chemistry , electrical engineering , electrode , composite number , psychology , social psychology , engineering , electrochemistry

The electric behaviors of both free‐carbon phase and ceramic phase in polymer‐derived amorphous silicoaluminum oxycarbide were studied by impedance spectroscopy. The results revealed that the resistance of both ceramic phase and free‐carbon phase are similar to each other and decreased with pyrolysis temperature. Meanwhile, the ceramic phase showed higher capacitance than the free‐carbon phase. With increasing pyrolysis temperature, the capacitance of the ceramic phase drastically decreased, but that of the free‐carbon phase remained similar. Each phase exhibited a relaxation process, which moved to higher frequency with increasing pyrolysis temperature. The results are correlated with the structural evolution of the two phases.

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