화학용액 혼합과 수소환원법을 이용한 나노구조 Fe-Co 합금분말의 제조

Abstract

In this study, chemical solution mixing and hydrogen reduction method was used to fabricate nanostructured FexCo1-x alloy powders. Fe-Co chloride mixture, FeCl2 and CoCl2 with 99.9% purity, were reduced in hydrogen atmosphere. Nanostructured Fe-Co alloy powders with a grain size of 50 nm were successfully fabricated. Magnetic properties of fabricated Fex-Co1-x (x=0, 10, 30, 50, 70, 100) alloy powders with the same grain size were measured because size factor can affect magnetic properties. Coercivity of Fe-Co alloy powders were increased with increasing Co contents. Maximum value of coercivity in various Co contented Fe-Co alloy powders with similar grain size was 125 Oe at Fe100. Saturation magnetization value at Fe70Co30 composition showed maximum value of 219 emu/g and saturation magnetization value decreased with increasing Co contents and minimum value of 155 emu/g was observed at Co100.