DocumentCode
3079023
Title
Microwave dielectric properties of(Y2-xRx)BaCuO5 (R=rare-earth) solid solutions
Author
Ogawa, H. ; Watanabe, M. ; Ohsato, H. ; Humphreys, C.
Author_Institution
Meijo Univ., Nagoya, Japan
fYear
1998
fDate
1998
Firstpage
517
Lastpage
520
Abstract
(Y2-xRx)BaCuO5 (R=rare-earth) solid solutions, in which Yb, Tm, Er, Ho, Dy and Gd ions are substituted for Y ions, were studied concerning the microwave dielectric properties. Each rare-earth series form solid solutions with the same crystal structure of the Y2BaCuO5-type. The dielectric constants of all the solid solutions are low, around 14, which is very good for high microwave frequency applications. The quality factors (Q·f) show high values with no systematic change: 62741 GHz for Yb-system with x=2 and 42602 GHz for Dy-system with x=1. Moreover, the temperature coefficients decrease according to the composition x and the value of Dy-system especially decrease to -6.4 ppm/°C. The solid solutions in Dy-system with x=2 have good properties: Q·f=31617 GHz, εr=14.9 and τf=-6.4 ppm/°C
Keywords
barium compounds; crystal structure; high-temperature superconductors; permittivity; rare earth compounds; solid solutions; yttrium compounds; dielectric constants; microwave dielectric properties; quality factors; solid solutions; temperature coefficients; Dielectric constant; Dielectric losses; Dielectric materials; Erbium; Frequency; Microwave technology; Microwave theory and techniques; Powders; Solids; Temperature;
fLanguage
English
Publisher
ieee
Conference_Titel
Applications of Ferroelectrics, 1998. ISAF 98. Proceedings of the Eleventh IEEE International Symposium on
Conference_Location
Montreux
ISSN
1099-4734
Print_ISBN
0-7803-4959-8
Type
conf
DOI
10.1109/ISAF.1998.786745
Filename
786745
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