磁参数对六角铁氧体RAM温度稳定性影响

Influences of Magnetic Parameter on Temperature Stability of Hexaferrite Absorbing Materials

从磁参数（饱和磁化强度，磁晶各向异性场）温度稳定性出发，对六角铁氧体ＲＡＭ的温度稳定性进行了讨论；通过对Ｍ、Ｗ型六角铁氧体在温度ｔ＝１８～１００℃，频率ｆ＝８～１２ＧＨｚ时吸收率Ｒ（Ｒ～ｆ）的温度稳定性和材料起始磁导率μ1随温度的变化曲线（μ1～ｔ）的测试，得到单轴六角铁氧体材料Ｒ～ｆ的温度稳定性优于平面六角铁氧体材料，并且和材料的μ1～ｔ变化规律吻合较好的结果。

The electromagnetic wave reflection characteristic of materials is decided by permeability μ_r, permittivity ε_r and the structure of the RAM. In this paper, the temperature stability of absorbing performance(TSAP) of M and W type hexaferrite are studied in the frequency bandf=8~12 GHz, with the test temperature of 18~100℃. As a result, the uniaxial anisotropy hexaferrite has better TSAP than planar hexaferrite, when the initial permeability μ_I also has better temperature stability.