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以高铁酸钡为基的永久磁铁,用于汽车制造业和电气工业。磁铁由高铁酸钡和SrCO_3粉末制成。如果将下列混合物(重量％)用于生产:SrCO_3粉末0.9～1.0,无定形硼粉末0.05～0.15,余量为高铁酸钡,则烧结温度可以降低,同时并不会造成磁性损失。高铁酸钡(BaO_5Fe_2O_3)先与SrCO_3混合,然后再与硼混合。将混合物进行干磨和湿磨,然后压制成磁坯。将压坯置于1040～1100℃烧结1小时,后者为任选温度。 优点:混合物允许将烧结温度从1200℃降至1100℃。磁性改进的系数由1.04增至1.2。
Barium iron-based permanent magnets for the automotive and electrical industries. The magnet is made of barium ferrate and SrCO 3 powder. If the following mixtures (% by weight) are used for the production: 0.9 to 1.0 of SrCO_3 powder, 0.05 to 0.15 of amorphous boron powder and the balance of barium ferrate, the sintering temperature can be reduced without causing magnetic losses. Barium ferrate (BaO_5Fe_2O_3) is mixed with SrCO_3 and then with boron. The mixture is dry milled and wet milled, then pressed into a magnet. The compact is placed at 1040 ~ 1100 ℃ sintering 1 hour, which is optional temperature. Advantages: The mixture allows to reduce the sintering temperature from 1200 ° C to 1100 ° C. The coefficient of magnetic improvement increased from 1.04 to 1.2.