Influence of Si on Magnetocaloric Effect of LaFe_12.3-xCo_0.7Si_xB_0.25Series Alloy

Magnetocaloric effect of LaFe_12.3-xCo_0.7Si_xB_0.25(x=1.1,1.2,1.1,1.2,1. 5,1.6) alloy was investigated and it was found that the increasing Si content could elevate the Curie temperature of the material,but could decrease the material of adiabatic temperature. Further LaFe_11.2Co_0.7Si_1.1B_0.25 alloy having the highest adiabatic temperature change,found that the alloy could promote generation and diffusion reaction of the main phase(NaZn13 phase). And the biggest magnetic entropy into the alloy was 7.3 J/kg,K,2. 2 times of pure Gd.