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High-stability garnet microwave ferrite magnetic sheet and preparation method thereof
The invention belongs to the technical field of magnetic materials, and discloses a high-stability garnet microwave ferrite magnetic sheet and a preparation method thereof. The material composition ofthe high-stability garnet microwave ferrite magnetic sheet is Y<3-f-2d-a>GdCa<2d+a>BiFe<5-a-b-c-d-sigma>SnInMnVO<12>, wherein a is more than 0 and no more than 0.7; b is more than 0and no more than 0.7; c is more than 0 and no more than 0.6; d is more than 0 and no more than 1.5; e is more than 0 and no more than 0.6; f is more than 0 and no more than 0.8; and sigma is more than 0 and no more than 0.4. According to the high-stability garnet microwave ferrite magnetic sheet, Bi<3+> ions are added into the material, so the dielectric constant of the material is improved, anda Curie temperature is increased; and in addition, SnO<2>, In<2>O<3>, SnO<2> and In<2>O<3> are added into the material, so the anisotropy coefficient K of the material can be reduced, and the ferromagnetic resonance linewidth Delta(H) of the material is reduced. In terms of the process, high-pressure sintering is adopted to replace normal-pressure sintering, so sintering density is improved, the porosity of the material is reduced, and the ferromagnetic resonance linewidth Delta(H) of the material is reduced. Thus, the problem that the temperature coefficient of the material is poor is solved,and the material is guaranteed to have low ferromagnetic resonance linewidth Delta(H), high dielectric constant and high Curie temperature.
本发明属于磁性材料技术领域，公开了一种高稳定性石榴石微波铁氧体磁片及其制备方法。本发明的高稳定性石榴石微波铁氧体磁片的材料组成为YGdCaBiFe(5‑a‑b‑c‑d‑σ)SnInMnVO，其中，0≤a≤0.7，0≤b≤0.7，0≤c≤0.6，0≤d≤1.5，0≤e≤0.6，0≤f≤0.8，0≤σ≤0.4，所述高稳定性石榴石微波铁氧体磁片通过在材料中添加Bi离子提高材料介电常数，同时提高居里温度，另外在材料中添加SnO、InO，SnO、InO可以降低材料各向异性系数K，降低的材料铁磁共振线宽△H。在工艺上，采用高压烧结代替常压烧结的方式，提高烧结密度，降低材料气孔率，降低材料铁磁共振线宽△H。如此，既解决了材料温度系数差的问题，也保证了材料具备较低的铁磁共振线宽△H，较高的介电常数和居里温度。
High-stability garnet microwave ferrite magnetic sheet and preparation method thereof
The invention belongs to the technical field of magnetic materials, and discloses a high-stability garnet microwave ferrite magnetic sheet and a preparation method thereof. The material composition ofthe high-stability garnet microwave ferrite magnetic sheet is Y<3-f-2d-a>GdCa<2d+a>BiFe<5-a-b-c-d-sigma>SnInMnVO<12>, wherein a is more than 0 and no more than 0.7; b is more than 0and no more than 0.7; c is more than 0 and no more than 0.6; d is more than 0 and no more than 1.5; e is more than 0 and no more than 0.6; f is more than 0 and no more than 0.8; and sigma is more than 0 and no more than 0.4. According to the high-stability garnet microwave ferrite magnetic sheet, Bi<3+> ions are added into the material, so the dielectric constant of the material is improved, anda Curie temperature is increased; and in addition, SnO<2>, In<2>O<3>, SnO<2> and In<2>O<3> are added into the material, so the anisotropy coefficient K of the material can be reduced, and the ferromagnetic resonance linewidth Delta(H) of the material is reduced. In terms of the process, high-pressure sintering is adopted to replace normal-pressure sintering, so sintering density is improved, the porosity of the material is reduced, and the ferromagnetic resonance linewidth Delta(H) of the material is reduced. Thus, the problem that the temperature coefficient of the material is poor is solved,and the material is guaranteed to have low ferromagnetic resonance linewidth Delta(H), high dielectric constant and high Curie temperature.
本发明属于磁性材料技术领域，公开了一种高稳定性石榴石微波铁氧体磁片及其制备方法。本发明的高稳定性石榴石微波铁氧体磁片的材料组成为YGdCaBiFe(5‑a‑b‑c‑d‑σ)SnInMnVO，其中，0≤a≤0.7，0≤b≤0.7，0≤c≤0.6，0≤d≤1.5，0≤e≤0.6，0≤f≤0.8，0≤σ≤0.4，所述高稳定性石榴石微波铁氧体磁片通过在材料中添加Bi离子提高材料介电常数，同时提高居里温度，另外在材料中添加SnO、InO，SnO、InO可以降低材料各向异性系数K，降低的材料铁磁共振线宽△H。在工艺上，采用高压烧结代替常压烧结的方式，提高烧结密度，降低材料气孔率，降低材料铁磁共振线宽△H。如此，既解决了材料温度系数差的问题，也保证了材料具备较低的铁磁共振线宽△H，较高的介电常数和居里温度。
High-stability garnet microwave ferrite magnetic sheet and preparation method thereof
一种高稳定性石榴石微波铁氧体磁片及其制备方法
GUAN WANG (Autor:in) / LYU FEIYU (Autor:in) / WANG YUANZHEN (Autor:in)
22.05.2020
Patent
Elektronische Ressource
Chinesisch
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