摘要
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 Ba4.2Nd9.2Ti18O54 （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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期139-144,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(60001002)
