TY - GEN
T1 - Structure and dielectric properties of (Gd0.4Sm 0.5Yb0.1)2(Zr1-xCex) 2O7 ceramics
AU - Liu, Ling
AU - Xu, Qiang
AU - Wang, Fuchi
PY - 2010
Y1 - 2010
N2 - Complex rare-earth zirconates (Gd0.4Sm0.5Yb 0.1)2(Zr1-xCex)2O 7 (x=0, 0.3, 0.4) powders were synthesized by co-precipitation method. XRD and SEM results revealed that the complex rare-earth zirconates with single pyrochlore structure were prepared and no other phases existed among the grains. The dielectric properties of these compounds were investigated at low and microwave frequencies. It was found that they have intermediate dielectric constants and low dielectric loss in the whole frequency region, and they show the dielectric permittivity with weak frequency dependence. Substituting Zr 4+by Ce4+ leaded to smaller permittivity. Meanwhile, the dielectric contant values increase with increasing in the r(A 3+)/r(B4+)value in the pyrochlore-type phase region, which can be explained by the increase in the degree of ordering of oxygen vacancy. This new series of pyrochlore type oxides would be potential candidates for electronic ceramic applications and microwave frequency components.
AB - Complex rare-earth zirconates (Gd0.4Sm0.5Yb 0.1)2(Zr1-xCex)2O 7 (x=0, 0.3, 0.4) powders were synthesized by co-precipitation method. XRD and SEM results revealed that the complex rare-earth zirconates with single pyrochlore structure were prepared and no other phases existed among the grains. The dielectric properties of these compounds were investigated at low and microwave frequencies. It was found that they have intermediate dielectric constants and low dielectric loss in the whole frequency region, and they show the dielectric permittivity with weak frequency dependence. Substituting Zr 4+by Ce4+ leaded to smaller permittivity. Meanwhile, the dielectric contant values increase with increasing in the r(A 3+)/r(B4+)value in the pyrochlore-type phase region, which can be explained by the increase in the degree of ordering of oxygen vacancy. This new series of pyrochlore type oxides would be potential candidates for electronic ceramic applications and microwave frequency components.
KW - Complex rare-earth zirconates
KW - Dielectric properties
KW - Pyrochlores
UR - http://www.scopus.com/inward/record.url?scp=77954206335&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.105-106.394
DO - 10.4028/www.scientific.net/AMR.105-106.394
M3 - Conference contribution
AN - SCOPUS:77954206335
SN - 0878492755
SN - 9780878492756
T3 - Advanced Materials Research
SP - 394
EP - 397
BT - Chinese Ceramics Communications
T2 - 6th China International Conference on High-Performance Ceramics, CICC-6
Y2 - 16 August 2009 through 19 August 2009
ER -