Synthesis and Microwave Dielectric Properties of A^sub 16^V^sub 18^O^sub 61^ (A = Ba, Sr and Ca) Ceramics for LTCC Applications

• Published in: Journal of electronic materials 2016-06, Vol.45 (6), p.2996
• Main Authors: Suresh, E K, Prasad, K, Arun, N S, Ratheesh, R
• Format: Article
• Language: English
• Subjects: Ceramics; Chemical synthesis; Dielectric properties; Microwave communications; Solid state physics
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-016-4388-6

Low-temperature co-firable A^sub 16^V^sub 18^O^sub 61^ (A = Ba, Sr, Ca) ceramics have been prepared through the solid state ceramic route. The structural features of these ceramics have been studied using the x-ray diffraction (XRD) technique. The existence of the A^sub 16^V^sub 18^O^sub 61^ (A = Ba, Sr, Ca) ceramic phase was confirmed through laser Raman spectroscopic studies. Scanning electron microscopy analysis revealed a dense microstructure for the ceramics with closely packed polygonal grains. Among the samples studied, Ba^sub 16^V^sub 18^O^sub 61^ ceramic was prepared in the ultralow sintering temperature of 620°C for 1 h, which can be co-firable with an aluminium electrode. XRD and electron dispersive spectroscopy analyses showed that the samples under study have excellent compatibility with metal electrodes. The microwave dielectric properties measured using a vector network analyzer revealed that A^sub 16^V^sub 18^O^sub 61^ (A = Ba, Sr, Ca) ceramics have excellent unloaded quality factors.