Effect of Doped LBSCA on Sintering Characteristics and Dielectric Properties of MgNb2O6 Ceramics

In this paper, Low-loss MgNb
₂
O
₆
dielectric ceramics were compounded by solid-state method. The impacts of Li
₂
O-B
₂
O
₃
-SiO
₂
-CaO-Al
₂
O
₃
(LBSCA) dopant on the microstructure, density and microwave properties of MgNb
₂
O
₆
ceramics were studied. LBSCA dopants sintering temperature can be improved efficaciously of ceramics to 1000 °C with only a slight decrease in dielectric properties. In particular, sintering at 1000°C of 0.5 wt.% LBSCA-doped MgNb
₂
O
₆
ceramics has good microwave properties: ε
_r
= 20.6, Q×f = 69,000 GHz, and τ
_f
= -57.33 ppm/°C, and potential application of LTCC (low-temperature co-fired ceramics) candidate materials.