Additively manufactured ultra-low sintering temperature, low loss Ag2Mo2O7 ceramic substrates

Abstract

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3D Printing Materials and Techniques for Antennas and Metamaterials: A survey of the latest advances

“…With DIW, it has been shown that processing materials with an r f of ~35 and a tan d of <0.0001 can be achieved [11]. This process can also print with metal slurries alongside ceramics [12], [13], though the thermal expansion coefficients of the two materials need to be matched; otherwise, the green body will warp or crack during sintering. Out of the processes mentioned in this review, ceramics printed with DIW generally deliver the lowest-loss, highest-permittivity materials, with the capability of processing metals close to their bulk conductivity value in the same printed part.…”

“…Through process such as DIW, ceramics and metals can be printed together in the same component; however, this is a growing research area that faces considerable challenges of material compatibility and component warping due to unmatched thermal expansion coefficients. Current works demonstrate the potential of transmission lines and ring resonators printed on high-permittivity ceramics [13] in addition to miniaturized patch antennas by fully embedding the resonating patch in the ceramic [12]; an example is given in Figure 7.…”

ZnS and Ag2Mo2O7 regulate interface engineering by constructing S-scheme heterojunctions to facilitate photocatalytic hydrogen production

“…19,20 Ag 2 Mo 2 O 7 as a visible light active photocatalyst has many potential advantages (such as higher retention capacity and superior rate capability). [21][22][23][24][25][26][27] ZnS and Ag 2 Mo 2 O 7 have a suitable CB and VB positional relationship, and then they are coupled into an S-scheme heterojunction semiconductor group. For photocatalytic design, the S-scheme heterojunction is a perfect structure, promoting the disconnection of non-equilibrium carriers and maintaining the semiconductor group's power reduction and oxidation ability.…”

Direct ink writing of bismuth molybdate microwave dielectric ceramics

“…Additive manufacturing (AM) has been acknowledged as a promising enabler in manufacturing of ceramic components [17,18]. AM and its associated processes, can repeatably produce parts with performance comparable to the ones made via conventional processing, together with a greater design freedom that can deliver topologically optimised structures, functionally graded properties [19] and also multi-material printing [20,21] for producing intergraded circuitry and functional devices 3 [22]. However, there are very few examples in the literature, where AM of LTCCs for MW applications is being reported.…”

“…Printed and dried samples achieved εr = 4.4 and tanδ = 0.0006. The authors have recently demonstrated the additive manufacture of Ag2Mo2O7, an ultra-low sintering temperature and low loss MW ceramic compound, using the DIW technique [20]. Measurements from printed and fired test samples marked εr = 13.45, tanδ = 0.0005, Qxf = 17.056 and τf = -121 ppm/°C.…”