BONDED LA(FE, SI)₁₃ BASE MAGNETOCALORIC EFFECT MATERIAL, AND PREPARATION METHOD THEREFORE AND PURPOSE THEREOF

摘要

Provided are a bonded La(Fe, Si)₁₃ base magnetocaloric effect material with high strength, a preparation method thereof and a purpose thereof. The magnetocaloric effect material comprises magnetocaloric effect alloy particles and an adhesive. The particle size of the magnetocaloric effect alloy particles is less than or equal to 800 mm, and the magnetocaloric effect alloy particles are bonded into a bulk material by the adhesive; the magnetocaloric effect alloy particle has a NaZn₁₃ type structure, and the chemical formula thereof is: La_1-xR_x（Fe_1-p-qCo_pMn_q）_13-ySi_yA_α, wherein R is one or more elements selected from cerium (Ce), praseodymium (Pr), and neodymium (Nd), A is one or more elements selected from carbon (C), hydrogen (H), and boron (B), 0 ≤ x ≤ 0.5, 0.8 ≤ y ≤ 2, 0 ≤ p ≤ 0.2, 0 ≤ q ≤ 0.2, and 0 ≤ α ≤3.0. By using the forming method through adhesive bonding and thermosetting, and by means of adjusting the forming pressure, the thermosetting temperature, and the thermosetting atmosphere, the bonded La(Fe, Si)₁₃ base magnetocaloric effect material with high strength can be obtained, thereby overcoming the frangibility, the intrinsic feature, of the magnetocaloric effect material. The magnetic entropy change range substantially remains the same as compared with that before the bonding. The magnetic hysteresis loss declines as the forming pressure increases. The effective refrigerating capacity, with the maximum loss being deducted, remains unchanged or increases.