Difference in Ordering Ability Between Ca(Al1/2Nb1/2)O3 and Ca(Fe1/2Nb1/2)O3
Ca(Al1/2Nb1/2)O3 (CAN) and Ca(Fe1/2Nb1/2)O3 (CFN) were prepared by solid reaction route. With the sintering temperature increased, the Q×f value of CAN changes from 7 200 to 17 500 GHz due to the changing of the ordering degree, whereas, the dielectric constant and Q×f value of CFN decrease remarkably without structural changing. The reason of this phenomenon is that the difference in size of two B-site ions in CAN is larger than that in CFN. As a result, the ordering degree of CAN is more sensitive to the conditions of sample preparation, compared with CFN.
Wei Pan and Jianghong Gong
J. Shen et al., "Difference in Ordering Ability Between Ca(Al1/2Nb1/2)O3 and Ca(Fe1/2Nb1/2)O3", Key Engineering Materials, Vols. 368-372, pp. 144-146, 2008