Effects of (Mg1/3Sb2/3)4+ substitution on the structure and microwave dielectric properties of Ce2Zr3(MoO4)9 ceramics

• 作者: Xu ZHOU Lintao LIU Jiajia SUN Ningkang ZHANG Huazhang SUN Haitao WU Wenhong TAO
• 来源期刊: 先进陶瓷（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Research Article
• 页码范围: 778-789
• 页数: 12页
• 语种: 英文

摘要

Ce2[Zr1-x(Mg1/3Sb2/3)x]3(MoO4)9 (0.02 ≤ x ≤ 0.10) ceramics were prepared by the traditional solid-state method.A single phase,belonging to the space group ofR(3)c,was detected by using X-ray diffraction at the sintering temperatures ranging from 700 to 850 ℃.The microstructures of samples were examined by applying scanning electron microscopy (SEM).The crystal structure refinement of these samples was investigated in detail by performing the Rietveld refinement method.The intrinsic properties were calculated and explored via far-infrared reflectivity spectroscopy.The correlations between the chemical bond parameters and microwave dielectric properties were calculated and analyzed by Phillips-van Vechten-Levine (P-V-L) theory.Ce2[Zr0.94(Mg1/3Sb2/3)0.06]3(MoO4)9 ceramics with excellent dielectric properties were sintered at 725 ℃ for 6 h (εr =10.37,Q×f=71,748 GHz,and τf =-13.6 ppm/℃,εr is the dielectric constant,Q×fis the quality factor,and τf is the temperature coefficient of resonant frequency).