低磁矩大功率复合微波石榴石铁氧体的研究
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摘要
采用传统氧化物法制备了低磁矩大功率复合微波石榴石铁氧体YGdCaVInIG系列，并对影响其性能参数的因素作了研究。
实验发现，Mn可以有效降低材料的介电损耗和磁损耗，并在一定的范围内M_s稍有减小；Al可以明显降低材料的M_s，但也对居里温度T_c有巨大影响；适量Gd含量可以得到室温附近的抵消点，从而有效改善材料的温度稳定性。
实验还发现，采用无水乙醇作为球磨弥散剂，能有效改善材料的介电和磁性能；适当提高烧结温度，可以提高样品的密度，从而改善样品的性能，但过高烧结温度会引起低熔点离子挥发，使样品性能恶化，实验证明最佳烧结温度在1350～1360℃左右。
样品在被测量频率范围内，性能稳定。其主要性能参数为：f=9.5GHz时，⊿H_k≈160A／cm，⊿H≈500e；f=200MHz时，tanδ_e＜2×10~(-4)，ε′≈15～17，ε″＜5×10~(-3)：f=900MHz时，tanδ_e＜9×10~(-5)，ε′≈15～16，ε″＜4.5×10~(-3)。我们已经成功研制出适用于f=200MHz的低磁矩大功率复合微波石榴石铁氧体。
In the thesis, we have prepared a series of composite microwave garnet ferrite of low magnetic moment and high power by the conventional ceramic technique. And the key factors that influence its properties are researched.
As a result, we find that Mn substitution can decrease its dielectric loss and magnetic loss greatly with a lightly changed intensity of saturation magnetization, that Al substitution can decrease its intensity of saturation magnetization and Curie temperature greatly and that we can improve its temperature stability by obtaining a compensation point at about room temperature with suitable Gd content.
We also find that the samples' dielectric and magnetic properties can be effectually improved if we use absolute alcohol as ball-milling dispersing medium. In addition, we can improve the samples' properties by moderately raising the sintering temperature to raise its density, too. But exorbitant sintering temperature can volatilize some ions of low melting point and worsen the samples' properties in turn. We have proved that the best sintering temperature is about 1350癈~1360癈.
At last, we find that the samples' properties are lightly affected by the working frequency in the range measured. And we can conclude that we have successfully prepared the composite microwave garnet ferrite of low magnetic moment and high power for use at f=200MHz.
实验发现，Mn可以有效降低材料的介电损耗和磁损耗，并在一定的范围内M_s稍有减小；Al可以明显降低材料的M_s，但也对居里温度T_c有巨大影响；适量Gd含量可以得到室温附近的抵消点，从而有效改善材料的温度稳定性。
实验还发现，采用无水乙醇作为球磨弥散剂，能有效改善材料的介电和磁性能；适当提高烧结温度，可以提高样品的密度，从而改善样品的性能，但过高烧结温度会引起低熔点离子挥发，使样品性能恶化，实验证明最佳烧结温度在1350～1360℃左右。
样品在被测量频率范围内，性能稳定。其主要性能参数为：f=9.5GHz时，⊿H_k≈160A／cm，⊿H≈500e；f=200MHz时，tanδ_e＜2×10~(-4)，ε′≈15～17，ε″＜5×10~(-3)：f=900MHz时，tanδ_e＜9×10~(-5)，ε′≈15～16，ε″＜4.5×10~(-3)。我们已经成功研制出适用于f=200MHz的低磁矩大功率复合微波石榴石铁氧体。
In the thesis, we have prepared a series of composite microwave garnet ferrite of low magnetic moment and high power by the conventional ceramic technique. And the key factors that influence its properties are researched.
As a result, we find that Mn substitution can decrease its dielectric loss and magnetic loss greatly with a lightly changed intensity of saturation magnetization, that Al substitution can decrease its intensity of saturation magnetization and Curie temperature greatly and that we can improve its temperature stability by obtaining a compensation point at about room temperature with suitable Gd content.
We also find that the samples' dielectric and magnetic properties can be effectually improved if we use absolute alcohol as ball-milling dispersing medium. In addition, we can improve the samples' properties by moderately raising the sintering temperature to raise its density, too. But exorbitant sintering temperature can volatilize some ions of low melting point and worsen the samples' properties in turn. We have proved that the best sintering temperature is about 1350癈~1360癈.
At last, we find that the samples' properties are lightly affected by the working frequency in the range measured. And we can conclude that we have successfully prepared the composite microwave garnet ferrite of low magnetic moment and high power for use at f=200MHz.
引文
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[2]都有为，铁氧体，南京：江苏科学技术出版社，(1996)
[3]廖绍彬，铁磁学(下册)，北京：科学出版社，(1988)
[4]宛德福，马兴隆，磁性物理学，成都：电子科技大学出版社，(1994)
[5]胡国光，磁性材料，合肥：安徽大学内部参考资料，(1990)
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[7]M.Pardavi-Horvath, P.E.Wigen, IEEE Trans. on Mag., 23.5 (1987) 3730
[8]志全(译), IEEE Trans. on Mag., 10.3 (1974) 613
[9]后植(译), Abstracts of the Sixth Annual Conference on Magnetics in Japan, (1974) 81
[10]陈国华(译), AIP Conference Proceedings N:34 MMM-Intermag Conference, (1976) 265
[11]P. R(?)schmann, IEEE Trans. on Mag., 17.6 (1981) 2973
[12]P. R(?)schmann, IEEE Trans. on Mag., 20.5 (1984) 1213
[13]D.Rodic, M.Mitric, et al., J.M.M.M., 232 (2001) 1
[14]Y.Y. Song, S.C.Yu, W.T. Kim, et al., J.M.M.M., 177-181 (1998) 257
[15]胡国光等，功能材料，27．5 (1996) 443
[16]姚学标等，硅酸盐学报，25．2 (1997) 230
[17]姚学标等，功能材料，31．3 (2000) 267
[18]夏爱林等，磁性材料及器件，33．4 (2002) 4
[19]韩志全等，磁性材料及器件，26．3 (1995) 1
[20]韩志全等，磁性材料及器件，28．4 (1997) 11
[21]任仕晶等，第10届全国磁学和磁性材料会议论文集，(1999) 425
[22]徐茂忠等，第10届全国磁学和磁性材料会议论文集，(1999) 427
[23]韩志全，物理学报，48增刊 (1999) 291
[24]韩志全，磁性材料及器件，30．5 (1999) 1
[25]C.E.Patton, Phys. Rev., 179 (1969) 352
[26]Q.H.Vrehen, J. Appl. Phys., 40 (1969) 1849
[27]韩志全，磁性材料及器件，19．1 (1988) 16
[28]蒋微波等，磁性材料及器件，26．3 (1995) 41
[29]许小文等，磁性材料及器件，29．3 (1998) 25
[30]韩志全等，磁性材料及器件，32．5 (2001) 10
[31]P.E. Seiden, et al., J. Appl. Phys., 31.7 (1960) 1291
[32]陈仁杰等，磁性材料及器件，33．6 (2002) 15
[33]G.Winkler, et al., Philips. Res. Repts., 27 (1972) 151
[34]D. Rodic, M.Mitric, et al., J.M.M.M., 191 (1999) 137
[35]柴光惠(译)，J.Appl.Phys.,49.3 (1978) 2019
[36]F. Grasset, et al., J.M.M.M., 234 (2001) 409
[37]A.Snezhko, J.Englich, et al., J.M.M.M., 234 (2001) 227
[38]S.Geller, et al., Phys. Rev., 148 (1966) 522
[39]Bell, Syst. Tech., J43 (1964) 565
[40]Leo, J. Appl. Phys., 37 (1966) 1083
[41]E.Schlomann, et al., IEEE Trans. on Mag., 1 (1965) 168
[42]余梅等，物理学报，34．1 (1985) 39
[2]都有为，铁氧体，南京：江苏科学技术出版社，(1996)
[3]廖绍彬，铁磁学(下册)，北京：科学出版社，(1988)
[4]宛德福，马兴隆，磁性物理学，成都：电子科技大学出版社，(1994)
[5]胡国光，磁性材料，合肥：安徽大学内部参考资料，(1990)
[6]张药西等，国外近期专利及论文：铁氧体译文集(下册)，北京：798厂情报室出版，(1992) 9～16
[7]M.Pardavi-Horvath, P.E.Wigen, IEEE Trans. on Mag., 23.5 (1987) 3730
[8]志全(译), IEEE Trans. on Mag., 10.3 (1974) 613
[9]后植(译), Abstracts of the Sixth Annual Conference on Magnetics in Japan, (1974) 81
[10]陈国华(译), AIP Conference Proceedings N:34 MMM-Intermag Conference, (1976) 265
[11]P. R(?)schmann, IEEE Trans. on Mag., 17.6 (1981) 2973
[12]P. R(?)schmann, IEEE Trans. on Mag., 20.5 (1984) 1213
[13]D.Rodic, M.Mitric, et al., J.M.M.M., 232 (2001) 1
[14]Y.Y. Song, S.C.Yu, W.T. Kim, et al., J.M.M.M., 177-181 (1998) 257
[15]胡国光等，功能材料，27．5 (1996) 443
[16]姚学标等，硅酸盐学报，25．2 (1997) 230
[17]姚学标等，功能材料，31．3 (2000) 267
[18]夏爱林等，磁性材料及器件，33．4 (2002) 4
[19]韩志全等，磁性材料及器件，26．3 (1995) 1
[20]韩志全等，磁性材料及器件，28．4 (1997) 11
[21]任仕晶等，第10届全国磁学和磁性材料会议论文集，(1999) 425
[22]徐茂忠等，第10届全国磁学和磁性材料会议论文集，(1999) 427
[23]韩志全，物理学报，48增刊 (1999) 291
[24]韩志全，磁性材料及器件，30．5 (1999) 1
[25]C.E.Patton, Phys. Rev., 179 (1969) 352
[26]Q.H.Vrehen, J. Appl. Phys., 40 (1969) 1849
[27]韩志全，磁性材料及器件，19．1 (1988) 16
[28]蒋微波等，磁性材料及器件，26．3 (1995) 41
[29]许小文等，磁性材料及器件，29．3 (1998) 25
[30]韩志全等，磁性材料及器件，32．5 (2001) 10
[31]P.E. Seiden, et al., J. Appl. Phys., 31.7 (1960) 1291
[32]陈仁杰等，磁性材料及器件，33．6 (2002) 15
[33]G.Winkler, et al., Philips. Res. Repts., 27 (1972) 151
[34]D. Rodic, M.Mitric, et al., J.M.M.M., 191 (1999) 137
[35]柴光惠(译)，J.Appl.Phys.,49.3 (1978) 2019
[36]F. Grasset, et al., J.M.M.M., 234 (2001) 409
[37]A.Snezhko, J.Englich, et al., J.M.M.M., 234 (2001) 227
[38]S.Geller, et al., Phys. Rev., 148 (1966) 522
[39]Bell, Syst. Tech., J43 (1964) 565
[40]Leo, J. Appl. Phys., 37 (1966) 1083
[41]E.Schlomann, et al., IEEE Trans. on Mag., 1 (1965) 168
[42]余梅等，物理学报，34．1 (1985) 39