A new series of low-temperature cofirable Li3Ba2La3(1-x)Y3x(MoO4)8 microwave dielectric ceramics. Issue 14 (November 2018)

• Record Type: Journal Article
• Authors: Zuo, Ruzhong; Xu, Yudong; Shi, Min; Li, Weiqiong; He, Liangguo
• Is Part Of: Journal of the European Ceramic Society. Volume 38:Issue 14(2018)
• Page Start: 4677
• Page End: 4681
• Publication Date: 2018-11
• Subjects: Microwave dielectrics ceramics -- Low-temperature firing -- LTCC -- Molybdate; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2018.06.019
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: A new series of Li3 Ba2 La3(1-x) Y3x (MoO4 )8 microwave dielectric ceramics were prepared by a conventional solid-state reaction method. The Rietveld refinement results further confirm that Li3 Ba2 La3(1-x) Y3x (MoO4 )8 belongs to a monoclinic system with space group C2/c. Scanning electron microscopy results reveal that Li3 Ba2 La3(1-x) Y3x (MoO4 )8 ceramics can be well sintered at a low sintering temperature. In addition, the permittivity (εr ) of Li3 Ba2 La3(1-x) Y3x (MoO4 )8 ceramics was found to decrease gradually with increasing substitution content of Y 3+, while the quality factor (Qxf) and temperature coefficient of resonant frequency (τf ) increase with x monotonously. The x = 0.4 ceramic sintered at 700 °C for 4 h possesses optimum microwave dielectric properties of εr ∼ 14.4, Qxf ∼ 14, 994 GHz (at 9.0 GHz) and τf ∼ + 6.9 ppm/°C. Particularly, no chemical reaction between the matrix phase and Ag metal suggests that the Li3 Ba2 La1.8 Y1.2 (MoO4 )8 ceramic might be a promising candidate for low-temperature co-fired ceramic applications.