缺铁量对YCaZrVIG铁氧体性能的影响

Influence of iron deficiency on the properties of YCaZrVIG ferrites

用传统氧化物法制备了组分为Y2.3Ca0.7Zr0.3V0.2Fe4.5-δO1(20≤δ≤0.1)的石榴石型铁氧体(YCaZrVIG)。用XRD、SEM对样品进行物相和微结构表征。研究了缺铁量对YCaZrVIG铁氧体物相组成、烧结性能、微观结构及电磁性能的影响。结果表明,小量缺铁不会改变物相组成,但会造成样品更难烧结;随缺铁量的增大,介电常数基本不变,介电损耗明显降低后保持稳定,剩磁逐渐减小,矫顽力则是先减小再增大。当缺铁量δ=0.05时,可获得低损耗、低矫顽力的铁氧体。

The garnet ferrites with composition of Y2.3Ca0.7Zr0.3V0.2Fe4.5 -δO12 （0≤δ≤0.1） （YCaZrVIG） were prepared by conventional oxide ceramic method. The phase formation and microstructure were analyzed by X-ray diffraction （XRD） and scanning electron microscopy （SEM）, respectively. The influences of iron deficiency on phase compositions, sintering properties, microstructures and electromagnetic properties of YCaZrVIG ferrites were investigated. The results indicated that small iron deficiency has no effect on phase compositions but makes its sintering more difficult. Moreover, with increasing the amount of iron deficiency, dielectric constant is almost invariant, dielectric loss obviously decreases and then remains stable, remanence gradually decreases and coercivity decreases first and then increases. Ferrites with low dielectric loss and small coercivity can be obtained when the amount of iron deficiency is equal to 0.05.