The microwave dielectric properties of (Ni, Zn)0.5Ti0.5NbO4 solid solution

Usage of P–V–L bond theory in studying the structural/property regulation of microwave dielectric ceramics: a review

“…Interestingly, based on previous reports, it is the formation of secondary rutile Zn 0.15 Nb 0.3 Ti 0.55 O 2 that regulates the dielectric properties. [226][227][228][229] In our previous study, combined with the phase diagram, Zn 0.15+0.35x Ti 0.55−0.05x Nb 0.3+0.7x O 2+2x ceramics (shortened to xZTN-(1-x)ZNT) were planned through directly introducing Zn 0.15 Nb 0.3 Ti 0.55 O 2 into Zn 0.5 Ti 0.5 NbO 4 ceramics. 224 The purpose of this design is to understand the phase evolution and variations in bond features in both orthorhombic and tetragonal solid solution under the change in ionic occupancies in the absence of other donors.…”

Structural Evolution and Microwave Dielectric Properties ofxZn0.5Ti0.5NbO4-(1–x)Zn0.15Nb0.3Ti0.55O2Ceramics

“…12,13 In ixiolite-type O-ZTN ceramics, solid solution may be inapplicable due to its limited solid solubility; i.e., Ni 2+ limited solid solubility about x ∼ 0.2 in (Ni 1−x Zn x ) 0.5 Ti 0.5 -NbO 4 . 14 Mg 2+ replaced for Zn 2+ causes a formation of a columbite structure. 15 Ca 2+ and Sn 4+ co-substituting induces the formation of rutile Zn 0.15 Nb 0.3 Ti 0.55 O 2 phase (shortened as R-ZNT), turning the τ f value to a positive value of 21.20 ppm/ °C.…”

“…In ixiolite-type O-ZTN ceramics, solid solution may be inapplicable due to its limited solid solubility; i.e., Ni 2+ has a limited solid solubility about x ∼ 0.2 in (Ni 1– x ­Zn x ) 0.5 ­Ti 0.5 ­NbO 4 . Mg 2+ replaced for Zn 2+ causes a formation of a columbite structure .…”

Rutile-structured Ga0.5B0.5TiO4 (B = Nb, Ta) microwave dielectric ceramics

“…RE(Ti 0.5 W 0.5 )O 4 (RE = Pr, Nd, Sm, Gd, Tb, Dy and Y) compounds were also reported to have relative permittivity 13-30, Q u 9 f o from 5000 to 13,000 GHZ and s f from -5 to ?85 ppm/°C [7]. Similarly, Ni 0.5-x Zn xTi 0.5 NbO 4 exhibited e r = 62.54, Q u 9 f o = 13,500 GHz and s f = 65 ppm/°C [8].…”