A novel low-loss Ba12InNb9O36 microwave dielectric ceramic with 18-layer hexagonal perovskite structure. Issue 14 (November 2021)

• Record Type: Journal Article
• Authors: Zhang, Pengcheng; Li, Hao; Chen, Xiaoqing; Hu, Houlin; Xiang, Rui; Li, Canbing
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 14(2021)
• Page Start: 7044
• Page End: 7049
• Publication Date: 2021-11
• Subjects: Ba12InNb9O36 -- Hexagonal perovskites -- Microwave dielectric properties; 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.2021.07.044
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: A novel Ba12 InNb9 O36 microwave dielectric ceramic is prepared by a solid-state reaction method. Rietveld refinement and transmission electron microscopy confirm that Ba12 InNb9 O36 crystallizes as an 18-layer hexagonal perovskite structure with a stacking sequence (cccchh)3 for the BaO3 layers. A dense and compact microstructure is observed for the Ba12 InNb9 O36 ceramic, when sintered at 1470 °C, with an optimal relative density of 96.84 %. The intrinsic dielectric constant and dielectric loss are investigated based on the infrared reflectivity spectrum. The microwave dielectric properties of εr = 36.12, Q × f = 57, 250 GHz (at f = 6.24 GHz), and τf = 17.58 ppm/°C are obtained, rendering Ba12 InNb9 O36 ceramic a promising candidate material for microwave electronic devices.