Crystal structure, phonon characteristics, and dielectric properties of CaMgGe2O6: A novel diopside microwave dielectric ceramic. Issue 6 (15th March 2022)

• Record Type: Journal Article
• Authors: Cao, Yucheng; Zhang, Liangbin; Mei, Hongrong; Rao, Zhenggang; Tian, Tingfang; Li, Chunchun
• Is Part Of: Ceramics international. Volume 48:Issue 6(2022)
• Page Start: 8783
• Page End: 8788
• Publication Date: 2022-03-15
• Subjects: Ceramics -- Diopside structure -- Microwave dielectric properties -- Low permittivity -- Far-infrared spectra; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.01.270
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The monoclinic diopside structured CaMgGe2 O6 dielectric ceramics were synthesized by the traditional solid-phase reaction method, and their microwave dielectric properties were characterized. X-ray diffraction (XRD) and Rietveld refinement revealed that CaMgGe2 O6 belongs to the monoclinic system of space group C2/c. SEM images showed that dense CaMgGe2 O6 ceramics could be formed at the optimum sintering temperature of 1300 °C. Typically, ceramic sintered at 1300 °C for 6 h possessed outstanding microwave dielectric properties with ε r ∼7.96, Q × f ∼41, 280 GHz, and τ f ∼ −46.6 ppm/°C. Far-infrared spectra analysis revealed the intrinsic microwave dielectric properties of CaMgGe2 O6 ceramics. These findings demonstrate promising application prospects of CaMgGe2 O6 in microwave substrate materials.