Microwave ceramics Ba5Nb4O15 and Sr5Nb4O15 prepared by a reaction-sintering process

Synthesis and properties of TiO2 added NiNb2O6 microwave dielectric ceramics using a simple process

“…In recent studies, we also prepared BaTi 4 O 9 , Ba 5 Nb 4 O 15 , Sr 5 Nb 4 O 15 , and CaNb 2 O 6 (CN) ceramics using this process. [12][13][14] Microwave dielectric properties: ε r = 14.66, Q × f = 22,300 GHz, and τ f = −22.6 ppm/ • C could be obtained in CN ceramics. 14 columbite ceramics and (1 − x)NiNb 2 O 6 -xTiO 2 with x = 0.3 and 0.4 using the reaction-sintering process.…”

Effect of CuO on CaTiO3 perovskite ceramics prepared using a direct sintering process

“…Raw materials PbO and Nb 2 O 5 were mixed with Mg(NO 3 ) 2 or Fe(NO 3 ) 3 then pressed and sintered directly into PMN and PFN ceramics. These are the first successful synthesis of perovskite relaxor ferroelectric ceramics without having to go through the calcination step in the conventional solid-state route or in the columbite/wolframite route (two calcination steps were 6 were also prepared successfully via this reaction-sintering process [33][34][35][36][37]. In the present study, synthesis of CaTiO 3 ceramics by a reaction-sintering process and the effect of CuO addition were investigated.…”

Phase Evolution, Microstructure, and Microwave Dielectric Properties of Reaction-Sintered Li2ZnTi3O8 Ceramic Obtained Using Nanosized TiO2 Reagent

“…15 Many ceramic materials such as Ba 2 Ti 9 O 20 , CaNb 2 O 6 , Ba 5 Nb 4 O 15 , and Li 2 MgTi 3 O 8 have also been prepared by the reaction-sintering process. [16][17][18][19] In this work, LZT ceramics were synthesized using nanosized TiO 2 reagent to study the effect of this reagent and the reaction-sintering process on the densification, phase distribution, microstructure, and dielectric properties. We attempted to promote the Q Â f value and also to enhance the s f value of the LZT ceramic through the formation of TiO 2 secondary phase at high sintering temperature.…”