Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of strontium ferrite magnetic powder and injection magnetic powder containing strontium ferrite magnetic powder
The invention relates to the technical field of injection magnetic powder, and discloses a preparation method of strontium ferrite magnetic powder and injection magnetic powder containing the strontium ferrite magnetic powder. Pre-sintering is performed; adding nitroxide free radical modified oleic acid for ball milling modification; rolling is conducted; sintering is performed; and adding a grinding aid for vibration grinding. The injection magnetic powder is prepared by mixing large-particle powder A and small-particle powder B, the particle size distribution is as follows: D50 is 2.3-3.0 [mu] m, D90 is 8.5-9.5 [mu] m, and the average particle size is 3.3-5 [mu] m; the span value of the particle size distribution is 3.0 to 3.35. The orientation degree and morphology of the large-particle strontium ferrite magnetic powder are improved through the steps of ball milling modification and vibration milling, the large-particle strontium ferrite magnetic powder is mixed with the small-particle strontium ferrite magnetic powder to prepare the injection magnetic powder with specific particle size distribution, it is guaranteed that the magnetic powder has high compaction density, meanwhile, the fluidity of the magnetic powder is improved, and the magnetic powder can be recycled. And the magnet has good magnetic performance and mechanical performance.
本发明涉及注射磁粉技术领域，公开了一种锶铁氧体磁粉的制备方法及包含其的注射磁粉，锶铁氧体磁粉的制备方法步骤为：配料；预烧；加入氮氧自由基改性油酸进行球磨改性；辊压；烧结；加入助磨剂进行振磨。注射磁粉由大颗粒的粉料A和小颗粒的粉料B混合制成，粒度分布为：D50为2.3~3.0μm，D90为8.5~9.5μm，平均粒度为3.3~5μm；粒度分布的span值为3.0~3.35。本发明通过球磨改性和振磨步骤对大颗粒锶铁氧体磁粉的取向度和形貌进行改进，并将其与小颗粒锶铁氧体磁粉混合制成具有特定粒度分布的注射磁粉，在保证磁粉具有高的压实密度的同时，提升了其流动性，使磁体具有良好的磁性能和机械性能。
Preparation method of strontium ferrite magnetic powder and injection magnetic powder containing strontium ferrite magnetic powder
The invention relates to the technical field of injection magnetic powder, and discloses a preparation method of strontium ferrite magnetic powder and injection magnetic powder containing the strontium ferrite magnetic powder. Pre-sintering is performed; adding nitroxide free radical modified oleic acid for ball milling modification; rolling is conducted; sintering is performed; and adding a grinding aid for vibration grinding. The injection magnetic powder is prepared by mixing large-particle powder A and small-particle powder B, the particle size distribution is as follows: D50 is 2.3-3.0 [mu] m, D90 is 8.5-9.5 [mu] m, and the average particle size is 3.3-5 [mu] m; the span value of the particle size distribution is 3.0 to 3.35. The orientation degree and morphology of the large-particle strontium ferrite magnetic powder are improved through the steps of ball milling modification and vibration milling, the large-particle strontium ferrite magnetic powder is mixed with the small-particle strontium ferrite magnetic powder to prepare the injection magnetic powder with specific particle size distribution, it is guaranteed that the magnetic powder has high compaction density, meanwhile, the fluidity of the magnetic powder is improved, and the magnetic powder can be recycled. And the magnet has good magnetic performance and mechanical performance.
本发明涉及注射磁粉技术领域，公开了一种锶铁氧体磁粉的制备方法及包含其的注射磁粉，锶铁氧体磁粉的制备方法步骤为：配料；预烧；加入氮氧自由基改性油酸进行球磨改性；辊压；烧结；加入助磨剂进行振磨。注射磁粉由大颗粒的粉料A和小颗粒的粉料B混合制成，粒度分布为：D50为2.3~3.0μm，D90为8.5~9.5μm，平均粒度为3.3~5μm；粒度分布的span值为3.0~3.35。本发明通过球磨改性和振磨步骤对大颗粒锶铁氧体磁粉的取向度和形貌进行改进，并将其与小颗粒锶铁氧体磁粉混合制成具有特定粒度分布的注射磁粉，在保证磁粉具有高的压实密度的同时，提升了其流动性，使磁体具有良好的磁性能和机械性能。
Preparation method of strontium ferrite magnetic powder and injection magnetic powder containing strontium ferrite magnetic powder
一种锶铁氧体磁粉的制备方法及包含其的注射磁粉
MA XIAOWEI (Autor:in) / YANG TIANBO (Autor:in) / KIM HO-GYUN (Autor:in) / LIAN JIANGBIN (Autor:in) / LOU WANGYONG (Autor:in) / SONG YANGJIE (Autor:in) / WANG JINGLIE (Autor:in) / ZHOU YUEDE (Autor:in) / YUAN YUKAI (Autor:in)
04.04.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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