ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The crystal structure, phase relation, microstructure and dielectric properties of microwavedielectric ceramics comprised of Zn(Nb1-xTax)2O6 were investigated systematically using XRD, SEM anda network analyzer in this study. XRD results show that the Zn(Nb1-xTax)2O6 ceramics have theorthorhombic for all x values. However, two kinds of solid solutions phase regions based on columbitestructure and ZnTa2O6 structure were observed. SEM results show that the growth of grains is restrainedwith increase of Ta content in Zn(Nb1-xTax)2O6 ceramics. The dielectric properties exhibited a significantdependence on the crystal structure and compositions of the ceramics. The dielectric constant (εr) ofZn(Nb1-xTax)2O6 ceramics increased with increasing Ta content. However, the quality factors (Q×f) ofthis system show a different trend, and decrease with increasing Ta content. At x=0.65, a zero temperaturecoefficient of resonant frequency ( τf) can be realized in Zn(Nb1-xTax)2O6 ceramics system
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.265.pdf
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