张梦成,冯泉妤,刘友好,刘家琴,吴玉程

• 1:合肥工业大学工业与装备技术研究院
• 2:安徽省先进复合材料设计与应用工程研究中心
• 3:安徽大地熊新材料股份有限公司
• 4:稀土永磁材料国家重点实验室

摘要(Abstract)：

采用晶间掺杂法在钕铁硼合金粉体中掺入Al_2O_3,制备了Al_2O_3掺杂的烧结钕铁硼磁体，研究了Al_2O_3掺杂对钕铁硼磁体的电阻率、磁性能和微观结构的影响。结果表明：磁体电阻率随着Al_2O_3掺杂量的增加逐步提高，由未掺杂时的125.2μΩ·cm提高到Al_2O_3掺杂量为0.5 mass%时的144.4μΩ·cm,提高了15.3%;磁体矫顽力随着Al_2O_3掺杂量的增加呈先增大后减小的趋势，未掺杂磁体的矫顽力为13.28 kOe,当Al_2O_3掺杂量为0.3 mass%时，矫顽力达到最大值14.97 kOe,继续增加Al_2O_3掺杂量，磁体矫顽力开始下降；剩磁随着Al_2O_3掺杂量的增加逐步降低，由未掺杂时的13.97 kGs下降到Al_2O_3掺杂量为0.5 mass%时的12.69 kGs。掺杂适量的Al_2O_3有利于抑制磁体在烧结过程中的晶粒长大，从而起到细化晶粒的作用，提高磁体矫顽力，同时对温度稳定性也起到一定改善作用。

关键词(KeyWords)： 烧结钕铁硼;Al_2O_3;电阻率;晶间掺杂;矫顽力

Abstract:

Keywords:

基金项目(Foundation): 安徽省“特支计划”创新领军人才项目(Z2023TP0002);; 国家重点研发计划(2021YFB3502803);; 安徽省自然科学基金(2108085ME141);; 安徽省重点研究与开发计划项目(202104a05020019)

作者(Author): 张梦成,冯泉妤,刘友好,刘家琴,吴玉程

DOI: 10.13289/j.issn.1009-6264.2023-0359

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