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Cordierite is a promising material in the fields of high frequency multilayer ceramic components and ceramic package substrates. In this paper, cordierite green tapes were cast by aqueous tape casting with own formula. The characteristics of cordierite tapes such as phase transformation, sintering properties and dielectric properties were studied. Co-firing behavior of cordierite tape and Ag—Pd conductive metal was investigated tentatively. It was shown that the cordierite tapes can be sintered at 900 °C and the main crystalline phase is α- cordierite. The sintered tapes have good density, low dielectric constant ( e =3.4993; 2 GHz)and low dielectric loss (tg δ =0.0063; 2 GHz). There is good co-firing compatibility between cordierite and Ag—Pd conductive metal in the sintering process. The low temperature sintering, low dielectric cordierite tapes can be used as a potential material for high frequency application.

Nano-Cordierite powders used for high frequency chip inductors (MLCIs) were prepared by sol–emulsion–gel method. Effects of precursor concentration and [H 2 O]/[Si] molar ratio on this material were studied. The sol–emulsion–gel processing of Mg 2 Al 4 Si 5 O 18 as well as its dielectric property were investigated. Owing to the better packing efficiency and therefore higher surface energy of the freestanding nano-powder, the pressed pellets made by cordierite powder showed 98.6% theoretical density at 900 °C for 2 h. The additive Bi 2 O 3 was utilized to promote the crystallization or transformation to α-cordierite and sintering. The sol–emulsion–gel-derived cordierite ceramics have low dielectric constant ( e =3.0∼4.0; 18 GHz) and low dielectric loss ( tgδ