放电等离子烧结Bi、Ce掺杂钇铁石榴石陶瓷的微观结构与磁性能

doi:10.11896/cldb.22070054

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Abstract Yttrium iron garnet (Y₃Fe₅O₁₂, YIG) is a soft ferrite material with a cubic crystal structure. YIG has the Faraday effect and low ferromagnetic resonance linewidth, so it has broad application prospects in microwave magneto-optics. In this paper, Y_2.6-xBi_0.4Ce_xFe₅O₁₂ (x=0.1, 0.2) powder was successfully prepared by ball milling and pre-sintering, and then prepared into ceramics at lower temperature by spark plasma sintering (SPS). The phase analysis of the ceramic surface and inner layer was carried out by X-ray diffractometer, the morphology of powder and ceramic was observed by scanning electron microscope, and the static magnetic properties of the samples were tested by vibrating sample magnetometer. The experimental results show that the pre-sintering temperature is reduced to 1 050 ℃ due to the incorporation of Bi element. Using spark plasma sintering method, Bi, Ce-YIG ceramics with less pores and apparent densities of 5.358 5 g/cm³ and 5.446 9 g/cm³ were prepared at 1 050 ℃, 60 MPa, and holding time for 4 min. This paper realizes low temperature rapid sintering of YIG ceramics. The incorporation of Ce increases the saturation magnetization of Y_2.6-xBi_0.4Ce_xFe₅O₁₂ (x=0.1, 0.2) powder ceramics. The saturation magnetization of the powder is 23.01 emu/g and 25.96 emu/g, respectively, which is beneficial to the miniaturization of magneto-optical devices. The minimum ferromagnetic resonance linewidth of Bi,Ce-YIG ceramics is 140.5 Oe, which is beneficial to the low loss of the device in microwave applications.

Key words： yttrium iron garnet ceramic spark plasma sintering low temperature rapid sintering static magnetic property

Published: 25 February 2024 Online: 2024-03-01

CLC number:

O737

Fund:Project of 9th Institute of China Electronics Technology Group Corporation(2022SK-007)and the Project of State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology(21fksy27).

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	YE Dengjian
	DAI Bo

Cite this article:

YE Dengjian,DAI Bo. Microstructure and Magnetic Properties of Bi, Ce-YIG Ceramic Sintered by Spark Plasma Sintering[J]. Materials Reports, 2024, 38(4): 22070054-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22070054 OR http://www.mater-rep.com/EN/Y2024/V38/I4/22070054

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