Title :
The structure and dielectric properties of new oxyfluorides
Author :
Cai, Xiukai ; Zhang, Liangying ; Yao, Xi
Author_Institution :
Electron. Mater. Res. Lab., Xi´´an Jiaotong Univ., China
Abstract :
The structure of solid solution Bi1.5(Zn1-xLix)Nb1.5(O 7-xFx) obtained by substitution of oxygen by fluorine in the oxide Bi1.5ZnNb1.5O7 is cubic pyrochlore for 0⩽x⩽0.15. For 0.80⩽x⩽1.00, a distorted modification with low symmetry results, while the mixed phases of the above two are formed for other values of x between 0.15 and 0.80. The temperature dependences of the dielectric constants have been studied, and a dielectric anomaly at low temperatures (less than 100°C) has been observed
Keywords :
bismuth compounds; crystal structure; dielectric hysteresis; dielectric losses; ferroelectric materials; fluorine; lithium compounds; permittivity; pyroelectricity; zinc compounds; 100 C; Bi1.5(Zn1-xLix)Nb1.5(O7-xF x); Bi1.5(ZnLi)Nb1.5(OF)7; cubic pyrochlore; dielectric anomaly; dielectric constants; dielectric properties; oxyfluorides; structure; temperature dependences; Bismuth; Chemicals; Dielectric constant; Dielectric materials; Garnets; Laboratories; Phase distortion; Temperature dependence; Temperature distribution; X-ray diffraction;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522442
