Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Permanent magnetic ferrite with high voltage resistance and preparation method thereof
The invention provides a permanent magnetic ferrite with high voltage resistance and a preparation method thereof, and belongs to the technical field of permanent magnetic ferrites. The permanent magnetic ferrite with the high voltage withstanding characteristic is represented by a formula Ca1-m-yRySrmFe2n-z-xMzBxO1 + 3n, meanwhile, the invention provides a preparation method of the permanent magnetic ferrite with the high voltage withstanding characteristic, the preparation method comprises the steps of burdening, mixing, pre-sintering, crushing, forming and sintering, T pre-sintering = T0-(6.3-n-0. 5y) * 50 DEG C, optimal design of pre-sintering temperature matched with an initial raw material, and a sintering process of'slow heating and fast cooling 'of a formed compact, and the sintering process is characterized in that the sintering temperature of the formed compact is 0 DEG C-0. 5y * 50 DEG C; and in combination with an atmosphere controlled sintering technology in which the oxygen content is controlled to be 18-21% at the temperature of 1100-1180 DEG C during sintering of a molded compact, the permanent magnetic ferrite with good microstructure, pressure resistance, magnetic performance, stability of magnetic parameters of the magnet under a dynamic working condition and the like is finally obtained, so that actual requirements are met.
本发明提供了一种高耐压特性永磁铁氧体及其制备方法，属于永磁铁氧体技术领域。高耐压特性永磁铁氧体以式Ca1‑m‑yRySrmFe2n‑z‑xMzBxO1+3n表示，同时，提供一种高耐压特性永磁铁氧体的制备方法，包括配料和混合、预烧、粉碎、成型及烧结，其中，T预烧=T0‑（6.3‑n‑0.5y）×50℃与起始原料相匹配的预烧温度的优化设计，成型压坯的“慢升温、快降温”的烧结工艺，以及，结合成型压坯在烧结时1100℃到1180℃之间的氧气含量控制为18‑21%的气氛控制的烧结技术，最终，得到显微结构、耐压特性、磁性能、磁体在动态工作条件下的磁性参数的稳定性等良好的高耐压特性永磁铁氧体，以满足实际需求。
Permanent magnetic ferrite with high voltage resistance and preparation method thereof
The invention provides a permanent magnetic ferrite with high voltage resistance and a preparation method thereof, and belongs to the technical field of permanent magnetic ferrites. The permanent magnetic ferrite with the high voltage withstanding characteristic is represented by a formula Ca1-m-yRySrmFe2n-z-xMzBxO1 + 3n, meanwhile, the invention provides a preparation method of the permanent magnetic ferrite with the high voltage withstanding characteristic, the preparation method comprises the steps of burdening, mixing, pre-sintering, crushing, forming and sintering, T pre-sintering = T0-(6.3-n-0. 5y) * 50 DEG C, optimal design of pre-sintering temperature matched with an initial raw material, and a sintering process of'slow heating and fast cooling 'of a formed compact, and the sintering process is characterized in that the sintering temperature of the formed compact is 0 DEG C-0. 5y * 50 DEG C; and in combination with an atmosphere controlled sintering technology in which the oxygen content is controlled to be 18-21% at the temperature of 1100-1180 DEG C during sintering of a molded compact, the permanent magnetic ferrite with good microstructure, pressure resistance, magnetic performance, stability of magnetic parameters of the magnet under a dynamic working condition and the like is finally obtained, so that actual requirements are met.
本发明提供了一种高耐压特性永磁铁氧体及其制备方法，属于永磁铁氧体技术领域。高耐压特性永磁铁氧体以式Ca1‑m‑yRySrmFe2n‑z‑xMzBxO1+3n表示，同时，提供一种高耐压特性永磁铁氧体的制备方法，包括配料和混合、预烧、粉碎、成型及烧结，其中，T预烧=T0‑（6.3‑n‑0.5y）×50℃与起始原料相匹配的预烧温度的优化设计，成型压坯的“慢升温、快降温”的烧结工艺，以及，结合成型压坯在烧结时1100℃到1180℃之间的氧气含量控制为18‑21%的气氛控制的烧结技术，最终，得到显微结构、耐压特性、磁性能、磁体在动态工作条件下的磁性参数的稳定性等良好的高耐压特性永磁铁氧体，以满足实际需求。
Permanent magnetic ferrite with high voltage resistance and preparation method thereof
一种高耐压特性永磁铁氧体及其制备方法
WANG ZIMIN (Autor:in)
16.08.2024
Patent
Elektronische Ressource
Chinesisch
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