Correlation between chemical bond characteristics and microwave dielectric properties of KLa(MoO4)2 ceramics

• Published in: Ceramics international Vol. 51; no. 2; pp. 1751 - 1763
• Main Authors: Lin, Ting-Hao, Huang, Ching-Cheng, Huang, Cheng-Liang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2025
• Subjects: KLa(MoO4)2; Low-loss; LTCC; Microwave dielectric properties; P-V-L bond theory; P-V-L bond theory; LTCC; Low-loss; KLa(MoO4)2; Microwave dielectric properties
• ISSN: 0272-8842
• DOI: 10.1016/j.ceramint.2024.11.151

This investigation details the synthesis process of KLa(MoO4)2 ceramic utilizing a solid-state route method, alongside an analysis of its structural characteristics and the correlation between chemical bonds and microwave dielectric properties. The KLa(MoO4)2 phase was identified to possess a Monoclinic structure (C2/c space group). Sintering the sample at 820 °C resulted in a maximum relative density of 94.6 % and impressive microwave characteristics: εr = 9.63, Q × f = 50,100 GHz, and τf = −75.7 ppm/°C. Correlations between relative density and dielectric properties were observed. Further, application of the P-V-L bond theory facilitated the analysis of chemical bond parameters and their impact on microwave dielectric properties. The dielectric properties were correlated to chemical bond iconicity, packing fraction, lattice energy and bond valences.