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:
Microwave dielectric ceramics of CaO-2ZnO-xTiO2 (x=6~9) were prepared by citrate sol-gelmethod. The phase formation and structural properties of the ceramics were investigated as a function oftitania content (x). Monophase of Ca2Zn4Ti16O38 polytitanates were formed at x = 8. With the increase ofx, residual rutile phase were observed, whereas with the decrease of x, the CaTiO3 and Zn2TiO4 phaseswere detected. The microwave dielectric properties of the sintered ceramics were investigated usingresonance method. The variation of dielectric properties of the ceramics as a function of titania content (x)was investigated. For the monophase of Ca2Zn4Ti16O38 polytitanate at x = 8, the dielectric propertiesshowed minimum dielectric constant of 48.1, minimum temperature coefficient of resonant frequencies+44.1 ppm/oC, and maximum Q×f value of 31000 (at 6.921GHz). Deviating from x = 8, the dielectricconstant and temperature coefficient of resonant frequencies slightly increased, and the Q×f valuedecreased. The variation was concerned with the presence of secondary phase
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.304.pdf
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