DocumentCode :
906848
Title :
New Synthetic Route of Z-Type (Ba 
Co 
Fe  and its magnetic properties were characterized and compared to the sol-gel (SGP) and the conventional ceramic (CCP) processed Z-type Ba hexaferrite with two-step calcination. We have used 71.2% pure M-type (BaFe<sub>12</sub>O<sub>19</sub>) and 83.8% pure Y-type (Ba<sub>2</sub>Co<sub>2</sub>Fe<sub>12</sub>O<sub>22</sub>) precursors to synthesize Z-type by the MCP. As a result, 77.8% pure Co<sub>2</sub>Z hexaferrite particles were obtained. The purities of Co<sub>2</sub>Z hexaferrite particles processed by SGP and CCP were 75.1% and 70.7%, respectively. It was found that purity of Z-phase was controllable by purity of M- and Y-type precursor particles in the MCP. Loss tan delta of sintered MCP Co<sub>2</sub>Z decreased from 0.17 at 50 MHz to 0.068 at 300 MHz, while loss tan delta of sintered SGP and CCP Co<sub>2</sub>Z were 0.12 and 0.09 at 300 MHz. It is found that this loss tan delta is controllable by the purity of Z-phase and sintering process. These results imply that our new process is potentially applicable to synthesis of any other hexaferrites and also cost-effective.</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>barium compounds; calcination; cobalt compounds; magnetisation; sintering; sol-gel processing; Ba<sub>3</sub>Co<sub>2</sub>Fe<sub>24</sub>O<sub>41</sub>; Z-type barium hexaferrite particle synthesis; conventional ceramics; magnetic properties; magnetization; mixing-calcination process; sintering; sol-gel process; <formula formulatype=)
$hbox{Co}_{2}hbox{Z}$ ; Barium ferrite; Z-type; hexaferrite;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2009.2018883
Filename :
4957805
Link To Document :
