CAJ | 학술논문

通过常规陶瓷工艺,结合离子取代,以CaB2Si0.67O5.34作为助溶剂,添加CoFe2O4铁氧体制备了Ca0.218Sr0.43La0.432Fe12O19+δ永磁铁氧体材料.实验结果显示,在成分相同的情况下,与传统的离子取代相比,以CoFe2O4的形式添加,更能有效发挥 Co2+改善永磁铁氧体磁性能的潜力,所获材料的 Br可以提高 4%,同时其Hcj可以提高3%.当CoFe2O4的添加量为7.8wt%时,在空气中1190~1200℃下保温2h烧结,材料的显微结构、密度得到了显著改善,磁性能Hcb为331kA/m,Hcj为416kA/m时,Br可以达到0.458T.
통과상규도자공예,결합리자취대,이CaB2Si0.67O5.34작위조용제,첨가CoFe2O4철양체제비료Ca0.218Sr0.43La0.432Fe12O19+δ영자철양체재료.실험결과현시,재성분상동적정황하,여전통적리자취대상비,이CoFe2O4적형식첨가,경능유효발휘 Co2+개선영자철양체자성능적잠력,소획재료적 Br가이제고 4%,동시기Hcj가이제고3%.당CoFe2O4적첨가량위7.8wt%시,재공기중1190~1200℃하보온2h소결,재료적현미결구、밀도득도료현저개선,자성능Hcb위331kA/m,Hcj위416kA/m시,Br가이체도0.458T.
Based on the ordinary ceramic process and combined ion substituted technology, the Ca0.218Sr0.43La0.432Fe12O19+δpermanent magnet were synthesized by adding the proper amount of CaB2Si0.67O5.34 cosolvent, which could promote liquid phase sintering for permanent magnet, and the influences of CoFe2O4 components on the magnetic properties of permanent magnet were investigated. The results show that Co2+ ions could effectively improve the magnetic properties when added with CoFe2O4 form compared with traditional ion substituting technology, with increasing of 4% ofBr and 3% ofHcj, respectively. Under 1190 to 1200℃ sintering in air for 2 hours, the microstructure, density of products are significantly improved, and resultantly sample withHcb of 331kA/m,Hcjof 416kA/m, andBr of 0.458 T was prepared for CoFe2O4 content of 7.8wt%.