Open AccessStructural study of thick hexaferrite films
Author(s) -
T. Koutzarova,
Borislava Georgieva,
Svetoslav Kolev,
Chavdar Ghelev,
K. Krezhov,
Daniela Kovacheva,
Bénédicte Vertruyen,
Raphaël Closset,
Lan Maria Tran,
A. Zaleski
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1492/1/012064
Subject(s) - microstructure , materials science , crystallite , hexagonal crystal system , annealing (glass) , morphology (biology) , drop (telecommunication) , metallurgy , composite material , grain size , crystallography , chemistry , telecommunications , biology , computer science , genetics
We present details of the microstructural properties of Y- (Ba 2 Mg 2 Fe 12 O 22 , Ba 0.5 Sr 1.5 Zn 2 Fe 12 O 22 , Ba 0.5 Sr 1.5 Zn 2 Al 0.08 Fe11.92O 22 ) and Z-type (Sr 3 Co 2 Fe 24 O 41 ) hexaferrite thick films deposited by screen printing and drop casting on unpolished polycrystalline Al 2 O 3 substrates. The hexaferrites thick films obtained by drop casting exhibited considerable roughness and porousness compared with those obtained by screen printing. We found that the powders’ morphology significantly affects the microstructure of the thick films formed by screen printing. The microstructural analysis of the thick films shows that their microstructure differs from that of the powders. Further, during the annealing process the grains in the thick films grow and form hexagonal particles, the latter having the largest size, best shape and being best observed in the case of the Ba 2 Mg 2 Fe 12 O 22 film.