Browse > Article
http://dx.doi.org/10.4191/KCERS.2007.44.5.173

Microwave Dielectric Properties of CaZr(BO3)2 Ceramics  

Nam, Myung-Hwa (Department of Materials Science and Engineering, Korea University)
Kim, Hyo-Tae (Korea Institute of Ceramic Engineering and Technology)
Kim, Jong-Hee (Korea Institute of Ceramic Engineering and Technology)
Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
Publication Information
Journal of the Korean Ceramic Society / v.44, no.5, 2007 , pp. 173-178 More about this Journal
Abstract
The microstructure and microwave dielectric properties of dolomite type borates, $CaZr(BO_3)_2$ ceramics prepared by conventional mixed oxide method were explored. The sintering temperature of $CaZr(BO_3)_2$ ceramics could be reduced from $1150^{\circ}C\;to\;925^{\circ}C$ with little amount of sintering additives. Microwave dielectric properties of 3 wt% $Bi_2O_3-CuO$ added $CaZr(BO_3)_2$ ceramics sintered at $925^{\circ}C$ were $K{\approx}10.4,\;Q{\times}f{\approx}80,000GHz\;and\;TCF{\approx}+2ppm/^{\circ}C$. Thus obtained LTCC tape was co-fired with Ag paste for compatibility test and revealed no sign of Ag reaction with the ceramics. Therefore, $CaZr(BO_3)_2$ ceramics is considered as a possible candidate material for low temperature co-fired multilayer devices.
Keywords
$CaZr(BO_3)_2$; LTCC; Microwave dielectric properties; Co-fire; Compatibility;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 A. Yokoi, H. Ogawa, and A. Kan, 'Microwave Dielectric Properties of $BaO-Ta_2O_5-TiO_2$ System,' J. Euro. Ceram. Soc, 26 [10] 2069-207 (2006)   DOI   ScienceOn
2 J.-j. Bian, D.-W. Kim, and K. S. Hong, 'Glass-free LTCC Microwave Dielectric Ceramics,' Mat. Res. Bull., 40 [12] 2120-29 (2005)   DOI   ScienceOn
3 M. H. Nam, H. T. Kim, J. H. Nam, D. H. Yeo, J. H. Kim, and S. Nahm, 'Low-temperature Sintering and Dielectric Properties of $BaSn(BO_3)_2$ Ceramics (in Korean),' J. Kor. Ceram. Soc., 43 [2] 92-7 (2006)   과학기술학회마을   DOI   ScienceOn
4 E. S. Kim, B. S. Chun, J. D. Kim, and K. H. Yoon, 'Low Temperature Sintering and Microwave Dielectric Properties of $[Ca_{0.6}(Li_{0.5}Nd_{0.5})_{0.4}]0.45Zn_{0.55}TiO_3$,' Mat. Sci. Eng., B 99 [1] 243-46 (2003)   DOI   ScienceOn
5 M. Valant and D. Suvorov, 'Glass-free Low-temperature Cofired Ceramics: Calcium Germanates, Silicates and Tellurates,' J. Euro. Ceram. Soc., 24 [6] 1715-19 (2004)   DOI   ScienceOn
6 N. Iwase, 'Dolomite Type Boron Compound,' Elec. Ceram.(in JPN), 87 (2002)
7 T. D. Thangh, N. Iwase, H. Egami, and E. Ichimori, 'Low Temperature Sintered Ceramics for Hybrid Functional Circuit (HFC) Substrates,' Proc. 3rd Int'l Microelectronics Conf., 220-23 (1984)
8 G. Bayer, 'Thermal Expansion Anisotropy of Dolomite- Type Borates $Me^{2+}$$Me^{4+}B_2O_6$ B2O6,' Zeitschriftfur Kristallographie, 133 85-90 (1971)   DOI
9 T. Hu, A. Uusimaki, H. Jantunen, S. Leppavuori, K. Soponmanee, and S. Sirisoonthorn, 'Optimization of $MgTiO_3-CaTiO_3$ Based LTCC Tapes Containing $B_2O_3$ for Use in Microwave Applications,' Ceramics International, 31 [1] 85-93 (2005)   DOI   ScienceOn