Synthesis of Sm2Fe17N3 powder having a new level of high coercivity by preventing decrease of coercivity in washing step of reduction-diffusion process
Synthesis of Sm2Fe17N3 powder having a new level of high coercivity by preventing decrease of coercivity in washing step of reduction-diffusion process
复制标题
通过防止还原扩散法洗涤步骤中矫顽力的降低，合成具有新水平高矫顽力的Sm2Fe17N3粉末
DOI：
10.1016/j.jallcom.2019.06.385
复制
发表时间：
2019
影响因子：
6.2
通讯作者：
Y. Kuroiwa
中科院分区：
文献类型：
--
作者：
Shusuke Okada;Eri Node;K. Takagi;Y. Fujikawa;Y. Enokido;C. Moriyoshi;Y. Kuroiwa
采用还原扩散法合成Sm2Fe17N3粉末需要洗涤过程以除去CaO和Ca残留物，但通常与结晶度降低有关。同步辐射X射线衍射研究表明，形成的SmFe5穷人硬磁相在水洗涤处理。横截面电子显微镜分析的颗粒揭示了乙酸洗涤处理溶解的杂质相伴随Sm2Fe17N3颗粒的表面损伤。研究了一种新的洗涤工艺，以避免形成的因素，降低矫顽力，Sm_2Fe_（17）N_3粉末具有约20%的高矫顽力比以前的报告，达到28.1 kOe。
Synthesis of Sm2Fe17N3powder by a reduction-diffusion technique requires a washing process to remove CaO and Ca residues, but it is typically associated with a decrease of coercivity. Synchrotron radiation X-ray diffraction study revealed forming of a SmFe5poor hard magnetic phase in a water washing treatment. Cross-sectional electron microscopic analysis of particles revealed an acetic acid washing treatment to dissolve the impurity phases accompanied surface damages on Sm2Fe17N3particles. A new washing process to avoid forming of the factors which decrease coercivity was examined, and Sm2Fe17N3powders having about 20% higher coercivity than that in the previous reports, achieving up to 28.1 kOe, were successfully demonstrated.