【作者】 张晓；

【导师】 范志康；

【作者基本信息】 西安理工大学 ， 材料加工工程， 2004， 硕士

【摘要】 本文对各向同性铁氧体粘结磁体用偶联剂、粘结剂、固化剂，以及成型工艺、固化工艺对磁体性能的影响进行了多方面详细的研究。首先，在不同工艺条件下制备出粘结磁体，然后利用磁性能测试仪、力学性能测试设备等测试手段，分析了偶联剂的类型及其用量、粘结剂的类型及其用量、模压工艺和固化工艺等因素对铁氧体粘结磁体磁性能及力学性能的影响。得出以下结论： 1．使用钛酸酯偶联剂处理磁粉制备粘结磁体的磁学性能比使用硅烷偶联剂处理的磁粉制备磁体的磁学性能要好。而使用硅烷偶联剂处理磁粉制备粘结磁体的力学性能比使用钛酸酯处理的磁粉制备粘结磁体的力学性能要好。 2．在粘结剂含量相同的条件下，E-20环氧树脂制备的磁体总比E-44环氧树脂制备的磁体具有更高的密度和更好的磁性能。 3．使用E-20环氧树脂作粘结剂时，随粘结剂所占比例的增加，磁体密度减小，磁体的磁性能包括剩磁B_r、最大磁能积（BH）_max、矫顽力H_cB均降低，但磁体抗压强度提高。 4．模压压力对磁体的磁性能和力学性能皆有影响。在其它实验条件相同的情况下，随着模压压力的升高，磁体的剩磁B_r、磁能积（BH）_max、矫顽力H_cB、内禀矫顽力H_cJ均先增大后减小。在1000MPa的范围内，抗压强度随着模压压力的升高而单调增大。当模压压力为800MPa，保压时间为西安理工大学硕士学位论文20秒时，磁体获得了良好的综合性能。 5.对于E一20环氧树脂/650聚酞胺体系，固化处理温度在90℃一110℃时，磁体获得了良好的综合性能。更多还原

【Abstract】 The influence of coupling agent, agglomerant, solidified agent, formation process and solidification process on isotropic ferrite bonded magnet has been systematically studied. At first, the bonded magnet has been produced at varied technological conditions. Then the influences of varied technological conditions, such as species and quantity of coupling agent, species and quantity of agglomerant, process of compression moulding and solidification process on magnetic property and compression strength of bonded magnet have been analysis by means of apparatus for measuring magnetic property and compression strength. Come to following conclusion:(1) Higher magnetic property has been obtained by the bonded magnet that use titanate coupling agent. Higher compression strength has been obtained by the bonded magnet that use silane coupling agent. If the combinations of higher magnetic and mechanic properties of the bonded magnet are wanted, titanate coupling agent is more proper than silence coupling agent.(2)Higher density and magnetic property have been obtained by E-44 epoxide resin comparing with E-20 epoxide resin.(3)Using E-20 epoxide resin as agglomerant, properties such as residualmagnetic flux density(Br), maximal magnetic energy product((BH)max), coercitive force(Hc) decrease along with rising of agglomerant quantity.(4)The bonded magnet with high magnetic and mechanic properties has obtained at the case of 800MPa compression force and 20 seconds’persistence.(5)For E-20 epoxide resin/650 polyamide system, good combination properties have been obtained when the bonded magnet was solidified at 90~110.更多还原