摘要
为实现NdAlO3-CaTiO3体系陶瓷材料的优异微波介电性能,采用传统固相反应法制备了(1-x)NdAlO3-xCaTiO3粉末,研究了不同x值对NdAlO3-CaTiO3陶瓷结构和性能的影响。结果表明,当x取0.60,0.65,0.70,0.75,0.80时,所制陶瓷的结构均比较致密,无气孔,晶界清晰,主晶相为(1-x)NdAlO3-xCaTiO3。随着x的增大,陶瓷的密度由4.95 g/cm3呈近似线性递减至约4.45 g/cm3,粒径由4μm增大至约10μm,微波相对介电常数εr由38增大至约65,谐振频率温度系数τf由-9×10-6/K增大至32×10-6/K,Q.f则由38 000降至约29 000。
To achieve the excellent microwave dielectric properties of NdAlO3-CaTiO3 ceramics, （1-x）NdAlO3-xCaTiO3 ceramics were prepared by the solid state reaction method. The effects ofx value on the property and structure of NdAlO3-CaTiO3 ceramics were studied. The results show that： when x equals to 0.60, 0.65, 0.70, 0.75, 0.80, all the prepared ceramics show a compact structure, few air bubbles and distinct crystal boundary, and the main phase of all the ceramics is （1-x）NdAlO3-xCaTiO3. The density of NdAlO3-CaTiO3 ceramics decreases from 4.95 g/cm^3 to 4.45 g/cm^3 almost linearly with increasing x value, while their particle size increases from 4 μm to 10 μm, relative permittivity εr increases from 38 to 65, temperature coefficient of resonant frequency τf increases from -9 ×10^-4/K to 32×10^-6/K, Q·f value decreases from 38 000 to 29 000.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2011年第9期1-4,共4页
Electronic Components And Materials
基金
国防基础科研基金资助项目
