Characterization of BaMg1/3(Ta1−xNbx)2/3O3 ceramics obtained by a modified Pechini method

Synthesis, characterization, and microwave dielectric properties of Mg4Nb2O9 ceramics produced through the aqueous sol–gel process

“…Dense ceramics synthesized by the nanoparticles could be achieved at low-temperature of 1150 • C due to the effect of small size nanoparticles. Similarly, the sol-gel process was widely used in many other ceramic systems [16][17][18][19]. However, few researches about the microwave properties of the MN ceramic fabricated by the 0925-8388/$ -see front matter © 2010 Elsevier B.V. All rights reserved.…”

Reaction-sintering method for ultra-low loss (Mg0.95Co0.05)TiO3 ceramics

“…A variety of microwave dielectric ceramics with high Q × f value have been intensively investigated, such as MgTiO 3 , Mg 2 TiO 4 , Ba(Mg,Ta)O 3 , (Zr,Sn)TiO 4 , ZnTiNb 2 O 8 [1][2][3][4][5][6][7]. MgTiO 3 is one of the most popular dielectric materials for microwave devices, due to its high dielectric constant (ε r ∼ 17), high quality factor (Q × f value ∼160,000 GHz) and negative f value (−50 ppm/ • C) [8].…”

The Effects of (Ba0.4Ca0.6)SiO3Nano Spheroidization Glass Additives on the Microstructure and Microwave Dielectric Properties of Ba(Zn1/3Ta2/3)O3Ceramics

“…Typical compositions having a high quality factor among microwave dielectric properties include complex perovskite A 3 known to have a quality factor (Q×f o ), higher than 120,000 and a stable temperature coefficient of resonant frequency [2,3]. It is known that, to increase the quality factor of this composition, the ordering of the B-site (Zn and Ta) is required, and for this ordering, heat treatment at a temperature of 1600 ℃ or higher for a long time is required [4,5,6]. Methods that are generally used to lower the sintering temperature of microwave dielectric ceramics include a method of reducing the size of power, a method of adding V 2 O 5 , CuO, SiO 2 , B 2 O 3 and the like as sintering aids for promoting liquid-phase sintering, or a method of adding glass powder that forms a liquid phase by itself [7].…”