Ultralow-Temperature Synthesis and Densification of Ag2CaV4O12 with Improved Microwave Dielectric Performances

Chunchun Li*, Changzhi Yin, Jibran Khaliq, Laijun Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

At extremely low temperatures, Ag2CaV4O12 was easily synthesized using the traditional solid-state approach. With a low relative permittivity (εr) of 7.52, a high quality factor (Q × f) of 48 800 GHz (f = 13.6 GHz), and a temperature coefficient of resonance frequency (τf) of −77.4 ppm/°C, dense ceramics sintered at 480 °C with outstanding microwave dielectric characteristics were attained. By combining with rutile TiO2, a composite ceramic with balanced microwave dielectric properties (τf = 3.2 ppm/°C, εr = 10.96, and Q × f = 49 081 GHz) was achieved. No chemical reaction between Ag2CaV4O12 and silver and aluminum occurred. All of the findings show that Ag2CaV4O12 has the potential to be used as dielectric resonances in wireless communication and as substrates in low-temperature cofired ceramics. Furthermore, the processing at an ultralow temperature of Ag2CaV4O12 shows that it is extraordinarily energy saving from the point of view of fabrication and might allow for room-temperature synthesis by combining with high-energy mechanical milling or sintering using a high pressure such as hot isostatic pressing (HIP), spark plasma sintering (SPS), and cold sintering (CS).
Original languageEnglish
Pages (from-to)14461-14469
Number of pages9
JournalACS Sustainable Chemistry and Engineering
Volume9
Issue number43
Early online date21 Oct 2021
DOIs
Publication statusPublished - 1 Nov 2021

Fingerprint

Dive into the research topics of 'Ultralow-Temperature Synthesis and Densification of Ag2CaV4O12 with Improved Microwave Dielectric Performances'. Together they form a unique fingerprint.

Cite this