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|Title: ||TRANSFORMATION STUDIES OF M-TYPE TO W-TYPE HEXAFERRITE IN BAFE12-2XCO3XO19|
|Authors: ||MANDAL, SK|
|Issue Date: ||1994|
|Publisher: ||CHAPMAN HALL LTD|
|Citation: ||JOURNAL OF MATERIALS SCIENCE, 29(14), 3738-3742|
|Abstract: ||Samples of general formula BaFe12-2xCo3xO19 (x=0.1, 0.3, 0.5) have been synthesized by ceramic as well as citrate gel routes. The X-ray diffraction patterns indicate that M-type phase forms for x=0.1, while W-type phase is favourable for x=0.3 and 0.5. The results tor x=0.3 are particularly interesting. While the X-ray diffraction data show evidence of a monophasic W-type hexaferrite, the magnetic, thermal and microstructural investigations indicate a secondary phase presumably at grain boundaries. Transformation of M- to W-type hexaferrite has been explained in terms of different possibilities such as nucleation of secondary phases, formation of vacancies and different site occupation of ions in the structure.|
|Appears in Collections:||Article|
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