Low temperature sintering and microwave dielectric properties of Li2ZnSiO4 ceramics with ZB glass

Phase evolution and microwave dielectric properties of ceramics with nominal composition Li2x(Zn0.95Co0.05)2−xSiO4 for LTCC applications

“…The 3 r of Li 2 ZnSiO 4 is 5.8, which is lower than that of (Zn 0.95 -Co 0.05 ) 2 SiO 4 (6.16). 12,20 Fig The Q Â f values were all low when the samples were sintered at 850 C (less than 49 000 GHz), which is mainly attributed to the low relative densities. When the sintering temperature was increased to 900 C, the Q Â f values increased with the increasing x value and achieved the maximum of 131 579 GHz at x ¼ 0.25.…”

“…In a previous study, Li 2 ZnSiO 4 ceramics doped with 25 wt% ZB glass sintered at 950 C exhibited a Q Â f value of 10 800 GHz, which is approximated to the Q Â f value in the present work. 20 Hence, in addition to the inuence of extrinsic losses caused by lower densication, the high intrinsic losses of Li 2 -ZnSiO 4 thereby induced the dramatic decrease of Q Â f values. Fig.…”

“…where ceramics decreased with the excessive x content. 20 Considering the above-mentioned analysis, the optimal x value was set at 0.25 because of the best quality factor of Li 0.5 (Zn 0.95 Co 0.05 ) 1.75 SiO 4 . One of the most important dielectric properties when considering the practical applications for LTCC is the near-zero temperature coefficient of the resonant frequency (s f ).…”

“…2a 10,12 It was reported that lithium-ions partly substituted for metal cations signicantly reduced the sintering temperature compared with that of initial silicate materials. 15,16,20 Hence, the sintering temperature of Li 1.6 Zn 1.2 SiO 4 was lower than that of (Zn 0.95 Co 0.05 ) 2 SiO 4 . However, with the successive addition of lithium, the pores increased ( Fig.…”

Structure, Microwave Dielectric Properties, and Novel Low‐Temperature Sintering of xSrTiO3–(1−x)LaAlO3 Ceramics with LTCC Application

“…On the other hand, according to references, addition of ZnO–B 2 O 3 (ZB) can largely decrease the sintering temperature of Li 2 TiO 3 ceramic, Li 2 ZnSiO 4 ceramic, BaTi 4 O 9 ceramic, and Ba 4 (Nd 0.85 Bi 0.15 ) 9.33 Ti 18 O 54 ceramic without deteriorating the microwave dielectric properties. From these previous studies, systematic research on the effects of ZnO–B 2 O 3 on the structure, sintering behavior, and microwave dielectric properties of these ceramics is still not carried out.…”