混合、烧结及制粉工艺对压延铁氧体性能的影响
|
摘要
采用传统陶瓷烧结法制备粘结铁氧体磁粉,研究混合方式、烧结球团粒径以及制粉方式对产品产能的影响。采用一次混合破碎后再次混合,成分标准偏差控制在0.03,性能达到湿法混合水平,压延剩磁Br达到254mT,毛坯内禀矫顽力Hcj达到294kA/m,并有利于降低预烧成本提高生产效率。烧结球团粒径控制在8~15mm产品性能最高。烧结后采用混合制粉的方式,尤其采用砂磨后继续棒磨,性能达到最佳水平,压延剩磁Br达到265mT,毛坯内禀矫顽力Hcj达到305kA/m。
Bonded ferrite magnetic powders were prepared using a conventional ceramic sintering method.The effects of the mixing method,the size of the sintered pellets,and the milling method on the product′s productivity were investigated.After one-time mixing and re-mixing,the standard deviation of the composition is controlled at 0.03,the performance reaches the level of wet mixing,the rolling remanence Brreaches 254 mT,the intrinsic coercive force Hcjof the blank reaches 294 kA/m,the cost of pre-sintering is reduced and the production effectiveness is increased.Sintered pellet size is controlled at 8-15 mm with highest product performance.After sintering,the pellet is mixed and milled.After sanding,the rods were continuously grounded.The performance reached the best level,and the remanence Brwas 265 mT and the intrinsic coercive force Hcjwas 305 kA/m.
Bonded ferrite magnetic powders were prepared using a conventional ceramic sintering method.The effects of the mixing method,the size of the sintered pellets,and the milling method on the product′s productivity were investigated.After one-time mixing and re-mixing,the standard deviation of the composition is controlled at 0.03,the performance reaches the level of wet mixing,the rolling remanence Brreaches 254 mT,the intrinsic coercive force Hcjof the blank reaches 294 kA/m,the cost of pre-sintering is reduced and the production effectiveness is increased.Sintered pellet size is controlled at 8-15 mm with highest product performance.After sintering,the pellet is mixed and milled.After sanding,the rods were continuously grounded.The performance reached the best level,and the remanence Brwas 265 mT and the intrinsic coercive force Hcjwas 305 kA/m.
引文
[1]林海恋,王忆,温东强,等.湿磨工艺对锶铁氧体预烧料性能的影响[J].磁性材料及器件,2015.1(46):69.
[2]张伟,邱伟国,赵修彬.球磨工艺对永磁铁氧体磁性能的影响[J].金属功能材料,2018,25(1):30.
[3]许有义,吕宝顺,要继忠,等.各项异性铁氧体粘结磁粉制备工艺的研究[J].磁性材料及器件,1998.6(29):49.
[4]毛昌辉,杜军.高能机械研磨合成尖晶石型ZnFe2O4铁氧体的研究[J].粉末冶金工业,1999,9(3):13.
[5]李冬梅.球磨机球湿磨磁粉选择的参数对湿磨效果的影响[J].轻工科技,2016(20):40.
[6]张丹丹,倪锋,魏世忠,等.球磨时间对Al2O3/Mo复合材料组织与性能的影响[J].粉末冶金工业,2012,22(5):19.
[7]张浩,薛丽红,严有为.高能球磨法制备纳米晶纯钨粉末的研究[J].粉末冶金工业,2011,21(4):27.
[8]郑伟亮,盖国胜.物料的不同粉碎方式和粉碎机理的研究[C].全国粉体设备—技术—产品信息交流会,2003.
[9]盖国胜,马正先.超细粉碎分级技术[M].北京:中国轻工业出版社,2000.
[2]张伟,邱伟国,赵修彬.球磨工艺对永磁铁氧体磁性能的影响[J].金属功能材料,2018,25(1):30.
[3]许有义,吕宝顺,要继忠,等.各项异性铁氧体粘结磁粉制备工艺的研究[J].磁性材料及器件,1998.6(29):49.
[4]毛昌辉,杜军.高能机械研磨合成尖晶石型ZnFe2O4铁氧体的研究[J].粉末冶金工业,1999,9(3):13.
[5]李冬梅.球磨机球湿磨磁粉选择的参数对湿磨效果的影响[J].轻工科技,2016(20):40.
[6]张丹丹,倪锋,魏世忠,等.球磨时间对Al2O3/Mo复合材料组织与性能的影响[J].粉末冶金工业,2012,22(5):19.
[7]张浩,薛丽红,严有为.高能球磨法制备纳米晶纯钨粉末的研究[J].粉末冶金工业,2011,21(4):27.
[8]郑伟亮,盖国胜.物料的不同粉碎方式和粉碎机理的研究[C].全国粉体设备—技术—产品信息交流会,2003.
[9]盖国胜,马正先.超细粉碎分级技术[M].北京:中国轻工业出版社,2000.