Effect of CeO2 dopant on the structure and dielectric properties of Ba0.6Sr0.4TiO3-MgO ceramic
PAN Hong-li1, WANG Jing-liang2, LIU Peng2
(1 Department of Physics,Shaanxi University of Technology,Hanzhong 723001,Shaanxi, China; 2 College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
The effect of doping CeO2 on the Ba0.6Sr0.4TiO3 mixed with MgO 56% composites is investigated. The result shows that with increasing of CeO2 content, the grain size of the composite ceramic is decreased. The XRD、SEM and EDX give that the composite ceramic consists of BST and MgO phase. The phase transitionof composite ceramic shifts to low temperature with increase of CeO2 content, and the dielectric constant, loss tangent and the dielectric tunability also varies little. The k-factor of the sample increases initially, then decreases with the CeO2 dopant increasing. The simple sdoped with 0.2% CeO2 have the best dielectric propert.
KeyWords:
composite ceramic; phase shifter; barium strontium titanate; magnesia oxide
