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Affecting factors on low-temperature sintering of 0.85CaWO4-0.15SmNbO4 ceramics  

Kim, Su-Jung (Department of Materials Engineering, Kyonggi University)
Kim, Eung-Soo (Department of Materials Engineering, Kyonggi University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.17, no.6, 2007 , pp. 245-250 More about this Journal
Abstract
This study was focused on the effect of sintering additive and particle size on the low temperature sintering of $0.85CaWO_4-0.15SmNbO_4$ ceramics. With an increase of $CaV_2O_6$ content, the sintering temperature of the specimens was reduced from $1150^{\circ}C\;to\;800^{\circ}C$. The dielectric constant (K) and Qf value were increased with $CaV_2O_6$ content. These results are due to the enhancement of the density by the liquid phase sintering. Temperature coefficient of resonant frequency (TCF) was slightly shifted to the positive value with $CaV_2O_6$ content. Typically, K of 12.64, Qf of 23,106 GHz, TCF of $-34ppm/^{\circ}C$ were obtained for the specimens with 7 wt.% $CaV_2O_6$ sintered at $900^{\circ}C$ for 3 h.
Keywords
$0.85CaWO_4-0.15SmNbO_4$; Dielectric properties; Milling; Sintering;
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