中文摘要：

为研制适用于915MHzRFID天线小型化应用需要的磁介基板材料，采用固相反应烧结法研究了H2BO3掺杂对（Ba0.5Sr0.5）3CozFe24O41铁氧体微观形貌和磁介性能的影响。通过研究发现，H2BO3掺杂能很好地促进Co2Z铁氧体的低温烧结成相。同时，H2BO3掺杂也有利于抑制CozZ铁氧体晶粒生长。随着H3BO3掺杂量的增多，材料体系的磁导率持续下降，而介电常数先上升后下降。当掺杂H2BO3的质量分数为4％，材料体系在915MHz时可获得磁导率为2．45，介电常数为10．41，磁损耗正切为0．057，介电损耗正切为0．005的综合磁介性能。

英文摘要：

To develop the magneto-dielectric materials for 915 MHz RFID antenna miniaturization application, the solid-state reaction sintering method was adopted to investigate the influences of H3BO3 addition on the micro- structure and magneto-dielectric properties of the （Ba0.5 St0. 5 ）3 Co2 Fe24 O41 ferrite. It was found that H3 BO3 addition could promote crystallization of the Co2 Z ferrites under relatively low sintering temperature. Meanwhile, Ha BOa al- so suppressed grain growth of the ferrites. With the increase of Hs BOa content, the permeability continuously de- creased, while the dielectric constant first increased and then decreased. With 4% HaBO3 addition, the material could obtain the magneto-dielectric properties with a permeability of 2.45, a dielectric constant of 10.41, and a mag- netic loss tangent of 0. 057 and a dielectric loss tangent of 0. 005 at 915 MHz.