Single-step densification and magneto-dielectric response of Y3Fe5O12–EDTA composites for microwave substrates

Abstract

Numerous studies have been conducted over the past few decades on energy-efficient, sustainable, and cost-effective materials and technologies for consumer electronics. Among such materials, ferrite-based compounds are expected to play a significant role in the miniaturization of circuits. However, densification of such materials is a very challenging problem. The cold sintering process (CSP) has recently been found as an alternative strategy for producing advanced materials, enabling their densification at low temperatures. The present work uses different volume fractions of Y₃Fe₅O₁₂ with EDTA to create a dense composite system. Here, we report the synthesis of composites of the formula (1 –x)Y₃Fe₅O₁₂-xEDTA (x = 0.2, 0.3, 0.4, 0.5) through CSP. These composites possess a permittivity of 6.4–7 combined with a loss tangent of 10^–2. Moreover, for the 0.5 EDTA composite, ε_r of 5.7 and tanδ of 0.01 are obtained at 10 GHz, suggesting the prepared composites' potential for substrate applications.