A novel low-loss microwave dielectric ceramic Ba16ZrNb12O48. Issue 16 (December 2021)

• Record Type: Journal Article
• Authors: Zhang, Pengcheng; Li, Hao; Chen, Xiaoqing; Wen, Quanzhang; Li, Canbing
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 16(2021)
• Page Start: 165
• Page End: 170
• Publication Date: 2021-12
• Subjects: Ba16ZrNb12O48 -- Hexagonal perovskite -- Microwave dielectric ceramic; 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.2021.09.015
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: A novel low-loss microwave dielectric ceramic Ba16ZrNb12O48 is firstly reported: εr=36.85, Q×f=57, 000 GHz, and τf=48 ppm/℃. The relationship between microstructure and microwave dielectric properties were built. Infrared reflectivity spectra of Ba16ZrNb12O48 ceramics are investigated to understand the internal dielectric properties. Abstract: A novel Ba16 ZrNb12 O48 ceramic is synthesized by a solid-state sintering method. The phase composition, microstructure, infrared reflectivity spectrum and microwave dielectric properties of Ba16 ZrNb12 O48 ceramic sintered at 1400−1500℃ are investigated. The differential scanning calorimetry and X-ray diffraction analysis indicate that Ba16 ZrNb12 O48 crystallizes in the hexagonal perovskite structure with space group R-3 m at 1250℃. As the temperature increases, the permittivity and Q × f value exhibit a strong relevance to the relative density. The satisfactory microwave dielectric properties of εr = 36.85, Q × f = 57, 000 GHz (at f = 6.50 GHz), and τf = 48 ppm/℃ are obtained when the specimen is sintered at 1450℃, which renders Ba16 ZrNb12 O48 a potential candidate for microwave electronic devices.