用铁鳞制备Y33H-2永磁铁氧体预烧料工艺稳定性的探索与实践

Exploration and Practice of Process Stability of Y33H-2 Hard Ferrite Pre-sintered Materials From Iron Scale

从铁鳞的预处理、配方优化、混合工艺、对铁鳞进行二次氧化处理、预烧等环节对铁鳞制备Y33H-2永磁铁氧体预烧料的工艺稳定性进行了讨论。将铁鳞在850～900℃下氧化处理1.5～2h后,按Sr0.85Ca0.05La0.1.Fe11.85Zr0.05O19进行配料,另加0.1wt%的H3BO3并混合均匀,在650～700℃下氧化处理2h后,于1280±5℃预烧,细粉碎时,配入0.6wt%的CaCO3、0.4wt%的SiO2、0.5wt%的山梨糖醇,可制备出Y33H-2永磁铁氧体材料。

Process stability of Y33H-2 hard ferrite pre-sintered materials from iron scale was analyzed, including pre-treatment of iron scale, ingredient optimization, mixing, secondary oxidation of iron scale and pre-sintered. Proper process conditions and parameters for stably producing Y33H-2 hard ferrite pre-sintering material from iron scale was determined as follows： oxidation pre-treatment of 850 to 900℃ for 0.5 to 2h, ingredient of Sr0.85Ca0.05La0.1·Fe11.85Zr0.05O19 with H3BO3 additive of 0.1wt%, secondary oxidation at 650 to 700℃ for 2h, presintering at 1280＋5~C, fine crushing after adding CaCO3 of0.6wt%, SiO2 of 0.4wt%, and sorbitol of 0.5wt%.