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Sintering method for improving quality of permanent magnetic ferrite blank
The invention discloses a sintering method for improving the quality of a permanent magnetic ferrite blank. The method comprises a heating stage, a heat preservation stage and a cooling stage, and after the heat preservation stage is finished, the temperature in the kiln is reduced to 890-910 DEG C at the cooling speed of 200-260 DEG C/h, then the cooling speed is slowed down, the temperature in the kiln is reduced to 790-810 DEG C at the cooling speed of 180-220 DEG C/h, and then cooling continues. According to the invention, the proportion of residual magnetic products in ferrite products is obviously reduced, the proportion of cold crack products is basically unchanged, and the product quality is improved; compared with a conventional cooling method, the total consumed time of the cooling section is reduced, and the production efficiency is improved.
一种改善永磁铁氧体毛坯质量的烧结方法，包括升温阶段、保温阶段和降温阶段；保温阶段结束后，以200‑260℃/h的降温速度将窑炉内温度降至890~910℃，再减缓降温速度以180~220℃/h将窑炉内温度降至到790~810℃，之后继续降温。本发明明显降低铁氧体产品中的余磁产品比例，且冷裂产品比例基本不变，提高了产品质量；相对于常规降温方法，降温段总耗时减少，提高了生产效率。
Sintering method for improving quality of permanent magnetic ferrite blank
The invention discloses a sintering method for improving the quality of a permanent magnetic ferrite blank. The method comprises a heating stage, a heat preservation stage and a cooling stage, and after the heat preservation stage is finished, the temperature in the kiln is reduced to 890-910 DEG C at the cooling speed of 200-260 DEG C/h, then the cooling speed is slowed down, the temperature in the kiln is reduced to 790-810 DEG C at the cooling speed of 180-220 DEG C/h, and then cooling continues. According to the invention, the proportion of residual magnetic products in ferrite products is obviously reduced, the proportion of cold crack products is basically unchanged, and the product quality is improved; compared with a conventional cooling method, the total consumed time of the cooling section is reduced, and the production efficiency is improved.
一种改善永磁铁氧体毛坯质量的烧结方法，包括升温阶段、保温阶段和降温阶段；保温阶段结束后，以200‑260℃/h的降温速度将窑炉内温度降至890~910℃，再减缓降温速度以180~220℃/h将窑炉内温度降至到790~810℃，之后继续降温。本发明明显降低铁氧体产品中的余磁产品比例，且冷裂产品比例基本不变，提高了产品质量；相对于常规降温方法，降温段总耗时减少，提高了生产效率。
Sintering method for improving quality of permanent magnetic ferrite blank
一种改善永磁铁氧体毛坯质量的烧结方法
CHEN YUNLONG (author) / MAO BASHAN (author) / ZHANG TIANWEI (author) / YAN RAN (author) / HUANG JIFENG (author) / LIU HUANLONG (author) / ZHANG JIANBAO (author)
2023-12-01
Patent
Electronic Resource
Chinese
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