Magnetic properties and domain patterns of amorphous powder cores produced by the cold-pressing

冷压非晶磁粉芯的磁性能和磁畴图

• 批准号: 12650329
• 负责人: YAGI Masaaki
• 金额: $ 2.3万
• 依托单位: Sojo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650329/
• 关键词: amorphous powder; soft magnetic core; cold-pressing; sintering; low core loss; choking coil; 磁区構造; 成形体; 磁区観察

Amorphous Fe-Cr-Si-B-C powder cores with glass binders were produced by cold-pressing and sintering at relatively high temperatures below crystallization temperature. The density of the core obtained was about 80%. The magnetic properties of toroidal samples 30 mm in diameter were measured. For the core pressed at 2 GPa, room temperature and sintered at 460℃×20 min in air, the initial permeability in the frequency range up to 1 MHz for Hm = 5 mOe was about 100, and the core loss at 100 kHz for Bm = 0.1 T was 500 kW/m^3. These values were comparable with those of hot-pressed amorphous powder cores, which had been previously reported. Compared with a commercial Sendust powder core widely used for choking coils and fly-back transformers, the initial permeability was approximately equal and the core loss was 30% lower. Furthermore, the domain patterns of the amorphous core were observed and their relation to the magnetic properties was discussed.

以玻璃为粘结剂，采用冷压烧结工艺，在低于晶化温度的高温下烧结，制备了非晶Fe-Cr-Si-B-C粉芯。所获得的芯的密度为约80%。测量了直径为30 mm的环形样品的磁性能。对于在2GPa、室温下压制并在空气中460℃×20 min烧结的磁芯，在Hm = 5 MoE的频率范围内，直到1 MHz的初始磁导率约为100，在Bm = 0.1 T的频率范围内，100 kHz的磁芯损耗为500 kW/m^3。这些值与先前报道的热压无定形粉末芯的值相当。与广泛用于扼流线圈和回扫变压器的商用Sendust粉芯相比，初始磁导率大致相等，铁损降低30%。此外，还观察到了非晶磁芯的磁畴图案，并讨论了它们与磁性能的关系。

项目成果

I.Endo et al.: "Magnetic Properties of Compressed Amorphous Powder Cores and their Application to a Fly-back Converter"IEEE Transaction on Magnetics. 36(to be published). (2000)

I.Endo 等人：“压缩非晶磁粉芯的磁性及其在反激式转换器中的应用”IEEE 磁性学汇刊。

I.Endo, R.Okuno, H.Satake, I.Otsuka, H.Yamamoto, A.Shintani, M.Yoshino, M.Yagi: "Production of Amorphous Soft Magnetic Powder by the New Water Atomization Process SWAP (Japan)"Journal of the Japan Society of Powder and Powder Metallurgy. Vol.48, No.8. 697

I.Endo、R.Okuno、H.Satake、I.Otsuka、H.Yamamoto、A.Shintani、M.Yoshino、M.Yagi：“采用新水雾化工艺 SWAP 生产非晶软磁粉（日本）”

I.Endo et al.: "Magnetic Properties of Compressed Amorphous Powder Cores and their Application to a Fly-back Converter"IEEE Transaction on Magnetics. 36. 3421-3423 (2000)

I.Endo 等人：“压缩非晶磁粉芯的磁性及其在反激式转换器中的应用”IEEE 磁性学汇刊。

八木正昭 ほか: "常温成形法を用いたFe基アモルファス粉末成形磁心の磁気特性"日本応用磁気学会誌. 26・4-2(掲載予定). 4 (2002)

Masaaki Yagi等：“使用室温成型法的铁基非晶粉末成型磁芯的磁性能”日本应用磁学学会杂志26・4-2（待出版）。

八木正昭 ほか: "常温成形法を用いたFe基アモルファス粉末成形磁心の磁気特性"日本応用磁気学会誌. 26・4-2. 513-517 (2002)

Masaaki Yagi等人：“使用室温成型法的铁基非晶粉末成型磁芯的磁性能”日本应用磁学学会杂志26・4-2（2002年）。