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1 Electron Technology

1 1998

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The effects of sintering additives on sinterability and microwave properities of yttrium iron garnet

100%

Kim W. T. , Song Y. Y. , Yu S. C. , Park J. R. , Lee S. S.

tom Vol. 31, No. 1

121-128

The effects of small addition of either Bi₂O₃ or a mixture of CuO + B₂O₃ on sinterability and microwave properties of yttrium iron garnet (YIG), prepared using a conventional ceramic method, have been studied by means of scanning electron microscopy, X-ray diffractometry, magnetometry and ferromagnetic resonance experiments. Sintering temperature for YIG could be reduced by about 50 K or 150 K by adding small amount of Bi₂O₃ or a mixture of B₂O₃ + CuO. Saturation magnetization and Curie temperature of YIG samples were almost independent of the addition of sintering additives. YIG specimens sintered at 1623 K with 1.5 wt% Bi₂O₃ and YIG sintered at 1523 K with 1.0 wt% of B₂O₃ + CuO mixture showed ferromagnetic resonance linewidth DH of 62 Oe and 58 Oe, respectively, compared with 65 Oe in pure YIG specimen sinterded at 1673 K for 2 hrs.