(Ca_(1-x)Nd_x)[(Li_(1/3)Nb_(2/3))_(0.95)Zr_(0.15)]O_(3+δ)陶瓷微波介电特性

Microwave dielectric properties of (Ca_(1-x)Nd_x)[(Li_(1/3)Nb_(2/3))_(0.95)Zr_(0.15)]O_(3+δ) ceramics

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/℃.

Crystal structure and microwave dielectric properties of （Ca1-xNdx）[（Li1/3Nb2/3）0.95Zr0.15]O3＋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 Nd^3＋ 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/℃.