【摘要】 研究了A位Nd3+取代对(Ca1-xNdx)[(Li1/3Nb2/3)0.95Zr0.15]3+δ(0.0≤x≤0.2,CNLNZ)陶瓷的微观结构及微波介电特性的影响.当0.00≤x≤0.03时,体系为单一钙钛矿相,随Nd3+摩尔分数的增加,品质因素的值先增大,然后因B位l∶2有序度在x=0.02处下降而开始减小.分析了谐振频率温度系数随容忍因子的变化关系.当x=0.03时,陶瓷微波介电性能最佳:相对介电常数为32.7,品质因素为15 880 GHz,谐振频率温度系数为-6.4×10-6/℃.更多还原

【Abstract】 Crystal structure and microwave dielectric properties of(Ca1-xNdx)[(Li1/3Nb2/3)0.95Zr0.15]3+δ(0.0≤x≤0.2,CNLNZ) ceramics were investigated.A single phase with orthorhombic perovskite structure was prepared at 0.00≤x≤0.03.With an increase of Nd3+ content,the quality factor value firstly increased,and then began to decrease at x=0.02 due to a decrease of the degree of B-site 1∶2 ordering.The variation of temperature coefficient of resonator frequency with tolerance factor was discussed.When x=0.03,the optimum microwave dielectric properties: the permittivity is 32.7,the quality factor is 15 880 GHz,and the temperature coefficient of resonator frequency is-6.4×10-6/℃.更多还原