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Low temperature sintered yig ferrite based on ltcc technology and preparation method
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A low-temperature sintering and ferrite technology, which is applied in the field of electronic ceramics, can solve the problems of large ferromagnetic resonance line width, difficulty in sintering and densification, and low saturation magnetization, so as to achieve low ferromagnetic resonance line width and reduce lattice activation energy. , the effect of high saturation magnetization
Active Publication Date: 2021-12-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0004] The purpose of the present invention is to solve the problems mentioned in the background art that the low-temperature sintering and densification of YIG is difficult, the ferromagnetic resonance line width is large, and the saturation magnetization is small. Structural design, a YIG ferrite material suitable for LTCC technology with low sintering temperature, low ferromagnetic resonance linewidth and high saturation magnetization and its preparation method are proposed
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[0024] A kind of introduction low melting point compound, adopts multiple ion (Bi 3+ , V 5+ , Li + ) cooperating replacement replaces Y 3+ ﹑ Fe 3+The ions lower the sintering temperature by activating the lattice, supplemented by iron deficiency adjustment, and obtain a low-temperature sintered YIG ferrite material with high density, high saturation magnetization and low ferromagnetic resonance linewidth. The specific steps are as follows:
[0025] Step 1, pre-fired material preparation:
[0026] 1.1 To analyze pure iron oxide (Fe 2 o 3 ), yttrium oxide (Y 2 o 3 ), bismuth trioxide (Bi 2 o 3 ), lithium carbonate (Li 2 CO 3 ) and vanadium pentoxide (V 2 o 5 ) as raw material, according to Y 2.15 Bi 0.85 Fe 5-2x-y Li x V x o 12-1.5y (0
Embodiment 1
[0034] A kind of introduction low melting point compound, adopts multiple ion (Bi 3+ , V 5+ , Li + ) cooperating replacement replaces Y 3+ ﹑ Fe 3+ The ions reduce the sintering temperature by activating the lattice, and supplemented by adjusting the amount of iron deficiency to obtain a low-temperature sintered YIG ferrite material preparation method with high density, high saturation magnetization and low ferromagnetic resonance linewidth. Specific steps are as follows:
[0035] Step 1, pre-fired material preparation:
[0036] 1.1 To analyze pure iron oxide (Fe 2 o 3 ), yttrium oxide (Y 2 o 3 ), bismuth trioxide (Bi 2 o 3 ), lithium carbonate (Li 2 CO 3 ) and vanadium pentoxide (V 2 o 5 ) as raw material, according to chemical formula Y 2.15 Bi 0.85 Fe 5-2x-y Li x V x o 12-1.5y (x=0.03, y=0), ie Y 2.15 Bi 0.85 Fe 4.94 Li 0.03 V 0.03 o 12 After calculating the mass of each raw material, weigh the material, add absolute ethanol as a dispersant, the mas...
Embodiment 2
[0044] Compared with Example 1, this example differs in that: the sintering temperature in step 3.2 is changed to 930° C., and other steps are the same as Example 1.
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Abstract
A low-temperature sintered YIG ferrite based on LTCC technology and a preparation method thereof belong to the technical field of electronic ceramics. The chemical composition of the low-temperature sintered YIG ferrite is: Y 2.15 Bi 0.85 Fe 5‑2x‑ y Li x V x o 12‑1.5y , where 0<x≤0.1, 0≤y≤1. The YIG ferrite obtained by the present invention has a lower sintering temperature, is suitable for LTCC technology, and is beneficial to the manufacture of miniaturized and integrated microwave ferrite devices; at the same time, it also has higher saturation magnetization and lower The ferromagnetic resonance linewidth, the 4πMs of the sample sintered at 900°C at low temperature in Example 5 can reach more than 1900Gs, and the ferromagnetic resonance linewidth can be reduced to around 200Oe.
Description
technical field [0001] The invention belongs to the technical field of electronic ceramics, and in particular relates to a low-temperature sintered YIG ferrite material based on LTCC technology and a preparation method thereof. Background technique [0002] With the development of electronic information technology, electronic devices tend to be miniaturized, integrated and high-frequency. The use of low temperature co-fired ceramics (LTCC) technology to prepare miniaturized and highly integrated microwave devices is an important development direction at present. Yttrium iron garnet (YIG) ferrite material has become the key material of microwave ferrite devices because of its excellent characteristics such as high gyromagnetic properties, low microwave loss and wide frequency range. In order to obtain excellent properties such as high density, low ferromagnetic resonance linewidth, and low dielectric loss, the sintering temperature of YIG materials is generally about 1450°C,...
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