Journal of Ceramic Processing Research

Ceramic Processing Research Center (한양대학교 세라믹연구소)
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Use of copper tungsten oxide as a liquid phase sintering aid for barium hexaferrite

  • Fisher, John G. (School of Materials Science and Engineering, Chonnam National University) ;
  • Le, Phan Gia (School of Materials Science and Engineering, Chonnam National University) ;
  • Meng, Meng (School of Materials Science and Engineering, Chonnam National University) ;
  • Heo, Sang-Hyeon (School of Materials Science and Engineering, Chonnam National University) ;
  • Bak, Tae-Jin (School of Materials Science and Engineering, Chonnam National University) ;
  • Moon, Byeol-Lee (School of Materials Science and Engineering, Chonnam National University) ;
  • Park, In-San (School of Materials Science and Engineering, Chonnam National University) ;
  • Lee, Dong-Kyu (School of Materials Science and Engineering, Chonnam National University) ;
  • Lee, Wu-Hui (School of Materials Science and Engineering, Chonnam National University)
  • Published : 2018.10.01
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Abstract

The sintering behavior of $BaFe_{12}O_{19}$ with the addition of one and three weight % of $CuWO_4$ as a liquid phase sintering aid is studied. Samples are sintered in the temperature range $900-1250^{\circ}C$ and the effect of $CuWO_4$ addition on density, microstructure, phase composition and magnetic properties is examined. Compared to $BaFe_{12}O_{19}$ with no sintering aid addition, addition of 1 wt % $CuWO_4$ retards densification. Addition of 3 wt % $CuWO_4$ promotes densification at lower sintering temperatures but retards densification at temperatures > $1050^{\circ}C$. Three wt % $CuWO_4$ addition induces the formation of $BaWO_4$ and $Ba_3WFe_2O_9$ secondary phases at temperatures ${\geq}1100^{\circ}C$. Addition of $CuWO_4$ causes a decrease in saturation magnetization, remanent magnetization and coercivity.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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