Bi–Zn–Nb–O microwave dielectric materials for multilayer filter application

Silver cofirability differences between Bi1.5Zn0.92Nb1.5O6.92 and Zn3Nb2O8

“…Reagent grade oxide powders with an appropriate molar ratio of ZnO, and Nb 2 O 5 (99.9% purity each, Alfa Chemicals, USA) were used for preparing Zn 3 4,12 The two series of powders were characterized by light scattering (Mastersizer 2000, Malvern Instruments, UK) for particle size, B.E.T for surface area (Micromeritics, ASAP2000 BET, USA), electronic probe microanalyzer (EPMA, Joel, JXA-8600SX, Japan) equipped with WDS for chemical composition, and X-ray diffractometer (XRD, PW 1830, Philips, The Netherlands) for the crystalline structure.…”

“…[1][2][3][4] The sintering temperature can be further decreased to 850 • C by adding 2 mol% V 2 O 5 to Zn 3 Nb 2 O 8 , but silver migration behaviors were found after firing the mixture of V 2 O 5 -doped Zn 3 Nb 2 O 8 and silver powder. 4 Bi 2 O 3 -ZnO-Nb 2 O 5 system has also emerged as a good low sintering (∼1000 • C) microwave material because it exhibits high dielectric constant and low temperature coefficient of resonance frequency (τ f ).…”

Broadband DR antenna made of high-Q ceramic

“…The Zn 3 Nb 2 O 8 powder is prepared using conventional mixing solid method with an appropriate molar ratio and calcined at 1050 • C for 2 h. The crystalline phase of calcined Zn 3 Nb 2 O 8 powder is confirmed with the literature data. 7 The calcined powder is granulated by adding PVA, in comparison with the powder without adding PVA (non-granulated).…”

“…1,2 Numerous dielectric materials have been developed, for example, zinc-containing ceramics such as Zn 3 Nb 2 O 8 , are good candidates for microwave dielectric devices owing to its high-quality factor and relatively low temperature to achieve high density. [3][4][5][6][7][8] Dielectric resonator antenna (DRA) made of low-loss materials can have high efficiency in the millimeterwave band in which the ohmic loss becomes significant. 9 Various types of radiation pattern are available by exciting different resonant modes.…”

Sintering and dielectric properties of Bi1.5ZnNb1.5O7 cubic pyrochlore ceramics via high-energy milling technology

“…These properties make this compound a potential candidate for integrated microwave resonators and decoupling capacitors [1][2][3][4][5][6]. However, for RF applications of electronic equipments, further lowering the sintering temperature is still the topic of research due to being needed to co-fire with the cheaper electrodes with lower melting points, such as Ag, for multilayered device applications.…”