Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지

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)
  • Published : 2007.12.31
Download PDF
⟨ Previous Next ⟩

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

References

  1. Q.H. Yang, E.S. Kim and Y.J. Kim, 'Effect of $PbO-­B_{2}O_{3}-V_{2}O_{5}$ glass on the microwave dielectric properties of (Pb,Ca,La)(Fe,Nb)$O_{3}$ ceramics', Materials Science and Engineering, B 79(2-3) (2003) 236
  2. S. Hirano, T. Hayashi and A. Hattori, 'Chemical pro­cessing and microwave characteristics of (Zr,Sn)$TiO_{4}$ microwave dielectrics', Journal of Applied Physics 77(10) (1995) 534
  3. E. Nieto, J. F. Ferrandez, C. Moure and P. Duran, 'Mul­tilayer piezoelectric device based on PZT', Journal of Materials Science: Materials in Electronics (1996) 55
  4. D.A. Stanley, L.Y. Sadler and D.R. Brooks, Size reduc­tion of ceramic powders by attrition milling, presented at the International Conference on particle Technology, IIT Res. Inst., Chicago, III., Aug. (1973) 21-24
  5. E.S. Kim and S.H. Kim, 'Influence of bond valence on microwave dielectric properties of (1 - x)$CaWO_{4}-xLnNbO_{4}$ (Ln = Nd,Sm) solid solutions', Journal of Electroceramics Society 17(2-4) (2006) 471 https://doi.org/10.1007/s10832-006-8571-7
  6. A.N. Morozov, 'Investigation of the Lime-Vanadium pentoxide system', Megallurgia 13 (12) (1938) 21
  7. B.W. Hakki and P.D. Coleman, 'A dielectric method of measuring inductive capacitance in the millimeter range', IRE Transactions on Microwave and Techniques 8 (1960) 402 https://doi.org/10.1109/TMTT.1960.1124749
  8. T. Nishikawa, H. Tanaka and Y. Ishikawa, 'Precise mea­surement method for temperature coefficient of micro­wave dielectric resonator material', IEEE MTT-S International Microwave Symposium Digest 3 (1987) 277
  9. E.S. Kim, B.S. Chun, J.D. Kim and K.H. Yoon, 'Low­-temperature sintering and microwave dielectric properties of $[Ca_{0.6}(Li_{0.5}Nd_{0.5})_{0.4}]_{0.45}Zn_{0.55}TiO_{3}$ ceramics', Mate­rials Science and Engineering, B 99 (2003) 243 https://doi.org/10.1016/S0921-5107(02)00470-1
  10. K. Kondo, M. Okuyama qnd Y. Shibata, 'Low firing temperature ceramic for multilayer ceramic substrates', Advance in Ceramics (1986) 77
  11. H.T. Kim, S.H. Kim, S. Nahm and J.D. Byun, 'Low­temperature sintering and microwave dielectric proper­ties of zinc metatitanate-rutile mixtures using boron', Journal of the American Ceramic Society 82(11) (1999) 1043