Microwave dielectric of low-temperature sintering MgO ceramics with high-energy ball-milling method and LiF addition
CHENG Lei， LIU Peng*， ZHOU Jian-ping， CHEN Xiao-ming，ZHOU Xiao-juan， YAO Guo-guang, CHENG Lin, GUO Bao-chun
(College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
Using high-energy ball-milling (HEBM) method under different milling times, nanocrystalline MgO with different particle diameters were obtained from MgO powder. HEBM method with a nominal composition of (1-x)MgO-xLiF (x=0.01 ~ 0.08) induces the sintering temperature of MgO ceramics to be lower. The samples were tested and characterized by X-ray diffraction (XRD), nanoparticle size analyzer, scanning electron microscopy (SEM), network analyzer. It can be found that the MgO ceramics obtained from 25 h HEBM powders with 5mol% LiF(x=0.05) addition and sintered at 900 ℃ show excellent microwave dielectric properties relatively.
KeyWords:
high-energy ball-milling; MgO; LiF; ceramics; dielectric properties
