Fabrication of high quality factor cold sintered MgTiO3–NaCl microwave ceramic composites

Cold Sintering: An Energy-Efficient Process for the Development of SrFe12O19–Li2MoO4 Composite-Based Wide-Bandwidth Ferrite Resonator Antenna for Ku-Band Applications

“…13−15 The CSP is an energy-efficient sintering technique through which materials are densified by the simultaneous application of temperature, usually less than 300 °C, and pressure of the order of 500 MPa to a system for a maximum of 1 h. 16,17 A suitable liquid medium is necessary to facilitate the particle transport, which enhances the densification on the application of temperature and pressure. 16,18,19 According to Maria et al 17 and Bouville et al, 20 dissolution−precipitation and plastic deformation induced by temperature and pressure are the fundamental mechanisms associated with the cold sintering process. Further, Kaḧari et al 21 recently reported that LMO, which is readily soluble in water, can be very well densified at 120 °C.…”

“…The dielectric properties of SFO can be controlled by the formation of composites with low-loss microwave materials such as Li 2 MoO 4 (LMO), but it suffers the drawback of additional phase formations on conventional solid-state sintering. The recently reported novel technique called the cold sintering process (CSP) is not only a promising way to densify the materials at a comparatively low temperature but also an efficient way to avoid undesirable phase formations at elevated temperatures, which deteriorates the properties. − The CSP is an energy-efficient sintering technique through which materials are densified by the simultaneous application of temperature, usually less than 300 °C, and pressure of the order of 500 MPa to a system for a maximum of 1 h. , A suitable liquid medium is necessary to facilitate the particle transport, which enhances the densification on the application of temperature and pressure. ,, According to Maria et al and Bouville et al, dissolution–precipitation and plastic deformation induced by temperature and pressure are the fundamental mechanisms associated with the cold sintering process. Further, Kähäri et al .…”

Investigating the effects of uniaxial pressure on the preparation of MgTiO3–CaTiO3 ceramic capacitors for MRI systems

“…The ceramic powder was prepared by combining large and small grains in a ratio of 70:30 to ensure efficient compaction. The uniaxial pressing process was optimized with a pressure of 19 bars and compression-decompression times of 2-0.2 s, while the demoulding process was conducted with a slow and effective ejection of the ceramic by driving the two punches [16]. A descent speed of 2.2 mm/s for the lower jack and a rise speed of 10 mm/s for the upper jack were found to be suitable.…”

Insights Into the Microstructure and Dielectric Properties of Cold Sintered NaCa2Mg2V3O12 Based Composites

“…Sibi et al (2020) found that garnet mineral can be densified using NaCl, Li 2 MoO 4 , and V 2 O 5 . Recently, Santha et al (2020) reported the dielectric properties of cold sintered MgTiO 3 using NaCl as additive. Besides the advantages of low temperature, CSP can produce a near shape pellets, having the same diameter of the model and also there occurs no reaction between the ingredients, which paved the way to integrate the polymers, composites, nano particles and metals in ceramic matrix composites.…”