Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of sintered permanent magnetic ferrite
The invention relates to a preparation method of sintered permanent magnetic ferrite, which is characterized in that a considerable amount of borosilicate glass is added to replace boric acid, and silicon dioxide adopts fine-grained silicon dioxide with the granularity of 0.6-1 mu m. The method specifically comprises the following steps: (1) ball-milling and mixing; (2) wet forming process; and (3) sintering to obtain the sintered Sr permanent magnetic ferrite. After the silicon-boron glass powder is added, the residual magnetism of the permanent magnetic ferrite is greatly improved, the coercive force can be improved by adding the silicon dioxide, the fine-grained silicon dioxide, the pre-sintered material and the silicon-boron glass powder are subjected to wet-process roller ball milling, the fine-grained silicon dioxide can be fully and uniformly distributed around magnet grains, and under the condition of the same addition amount, the coercive force can be improved. The fine-grained silicon dioxide can greatly improve the coercive force under the condition of keeping high residual magnetism, and the comprehensive performance of the magnet is improved. By adopting the method, the sintered permanent magnetic ferrite which is free of boric acid addition, free of cracks and higher in comprehensive performance can be obtained.
一种烧结永磁铁氧体的制备方法，加入相当量的硅硼玻璃取代硼酸，二氧化硅采用粒度为0.6μm‑1μm的细粒度二氧化硅。具体包括以下步骤：（1）球磨混合工序；（2）湿法成型工序；（3）烧结工序，得到烧结Sr永磁铁氧体。硅硼玻璃粉添加后永磁铁氧体剩磁大幅提升，加入二氧化硅，可以提升矫顽力，而本发明选用细粒度二氧化硅，和预烧料、硅硼玻璃粉一起采用湿法滚筒球磨，能够让细粒度二氧化硅充分均匀分布在磁体晶粒周围，在同等添加量的情况下，细粒度二氧化硅能够在保持高剩磁的情况下大幅提升矫顽力，提升磁体的综合性能。采用本发明可以得到无硼酸添加、无裂纹且综合性能更高的烧结永磁铁氧体。
Preparation method of sintered permanent magnetic ferrite
The invention relates to a preparation method of sintered permanent magnetic ferrite, which is characterized in that a considerable amount of borosilicate glass is added to replace boric acid, and silicon dioxide adopts fine-grained silicon dioxide with the granularity of 0.6-1 mu m. The method specifically comprises the following steps: (1) ball-milling and mixing; (2) wet forming process; and (3) sintering to obtain the sintered Sr permanent magnetic ferrite. After the silicon-boron glass powder is added, the residual magnetism of the permanent magnetic ferrite is greatly improved, the coercive force can be improved by adding the silicon dioxide, the fine-grained silicon dioxide, the pre-sintered material and the silicon-boron glass powder are subjected to wet-process roller ball milling, the fine-grained silicon dioxide can be fully and uniformly distributed around magnet grains, and under the condition of the same addition amount, the coercive force can be improved. The fine-grained silicon dioxide can greatly improve the coercive force under the condition of keeping high residual magnetism, and the comprehensive performance of the magnet is improved. By adopting the method, the sintered permanent magnetic ferrite which is free of boric acid addition, free of cracks and higher in comprehensive performance can be obtained.
一种烧结永磁铁氧体的制备方法，加入相当量的硅硼玻璃取代硼酸，二氧化硅采用粒度为0.6μm‑1μm的细粒度二氧化硅。具体包括以下步骤：（1）球磨混合工序；（2）湿法成型工序；（3）烧结工序，得到烧结Sr永磁铁氧体。硅硼玻璃粉添加后永磁铁氧体剩磁大幅提升，加入二氧化硅，可以提升矫顽力，而本发明选用细粒度二氧化硅，和预烧料、硅硼玻璃粉一起采用湿法滚筒球磨，能够让细粒度二氧化硅充分均匀分布在磁体晶粒周围，在同等添加量的情况下，细粒度二氧化硅能够在保持高剩磁的情况下大幅提升矫顽力，提升磁体的综合性能。采用本发明可以得到无硼酸添加、无裂纹且综合性能更高的烧结永磁铁氧体。
Preparation method of sintered permanent magnetic ferrite
一种烧结永磁铁氧体的制备方法
YANG MENGWEI (Autor:in) / ZHANG TIEJUN (Autor:in)
10.09.2024
Patent
Elektronische Ressource
Chinesisch
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