研究了NdAlO3掺杂对Ba4.2Nd9.2Ti18O54(简称BNT)陶瓷材料微观结构及其微波介电性能的影响. 采用XRD和场发射扫描电子显微镜分析了掺NdAlO3后的BNT陶瓷材料的微观结构. 结果表明, 掺入的NdAlO3与Ba4.2Nd9.2Ti18O54形成了固溶体. 随着NdAlO3掺入量的增加, 材料的介电常数和谐振频率温度系数逐渐减小, Q×f值先增大后减小. 当NdAlO3的掺入量为10wt%时, 材料的Q×f值达到最大(11400GHz), 谐振频率温度系数接近为零(-0.7ppm/℃),此时材料的相对介电常数为66.29(3.5GHz).
The effects of NdAlO3 additives on the microstructure and the dielectric properties of Ba4.2Nd9.2Ti18O 54 (BNT) materials were investigated.
The microstructure of BNT doped with NdAlO3 was analyzed by X-ray diffraction and FESEM. The results show that the solid solutions are
formed between Ba4.2Nd9.2Ti18O54 and the NdAlO3 additives. The relative permittivity and the TCf values show a linear
decrease with the increase of NdAlO3 additive. The Q values exhibit a non-linear behaviour and reach maximiun (11400GHz) for the NdAlO3
additive at approximately 10wt%, while the relative permittivity and the TCf values are 66.29 (3.5GHz) and -0.7ppm/℃, respectively.
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