Sinterability and Microwave Dielectric Properties of xZnWO4-(1-x)TiO2 Ceramics Sintered at Low Temperature

저온 소결용 xZnWO4-(1-x)TiO2 세라믹스의 소결 및 마이크로파 유전 특성

  • 윤상옥 (강릉대학교 세라믹공학과) ;
  • 김관수 (강릉대학교 세라믹공학과) ;
  • 심상흥 (강원대학교 삼척캠퍼스 전기공학과) ;
  • 박종국 (강원대학교 삼척캠퍼스 전기공학과)
  • Published : 2006.09.01


Sinterability and microwave dielectric properties of $xZWO_{4}-(1-x)TiO_{2}$ ceramic systems with zinc-borosilicate glass and $TiO_{2}$ contents for LTCC(Low Temperature Co-fired Ceramics) were investigated. The addition of $3{\sim}10\;wt%$ ZBS glass ensured the sinterability below $900^{\circ}C$. In general, increasing ZBS glass content seemed to enhance the sinterability, but the quality factor($Qxf_{0}$) significantly decreased due to the formation of an excessive liquid and second phases. As for the addition of $TiO_{2}$, the dielectric constant(${\varepsilon}_{r}$) and temperature coefficient of resonant frequency(${\tau}_{f}$) showed to increase, while the quality factor($Qxf_{0}$) did not show an apparent change. The composition of $0.7xZnWO_{4}-0.3TiO_{2}$ ceramics sintered at $900^{\circ}C$ with 5 wt% ZBS glass demonstrated 21.6 in dielectric constant(${\varepsilon}_{r}$), 14,800 in quality factor($Qxf_{0}$), and $+5\;ppm/^{\circ}C$ in temperature coefficient of resonant frequency(${\tau}_{f}$).


  1. T. Takada, S. F. Wang, S. Yoshikawa, S. T. Tang, and R. E. Newnham, 'Effect of glass addition on BaO-$TiO_2-WO_3$ microwave ceramics', J. Am. Ceram. Soc., Vol. 77, No.7, p. 1909, 1994
  2. V. Tolmer and G. Desgardin, 'Low-temperature sintering and influence of the processing on the dielectric properties of $Ba(Zn_{1/3}Ta_{2/3})O_3$', J. Am. Ceram. Soc., Vol. 80, No.8, p. 1981, 1997
  3. F. U. Chikoba, S. Nakajima, and T. Ito, 'Fabrication of multilayer capacitors with silver internal electrode and alumina-glass composite materials', J. Cer. Soc. Jpn., Vol. 103, No.9, p. 969, 1995
  4. G. Gejger, 'Glass in electronic packaging application', J. Am. Cer. Soc. Bull., Vol. 69, No.7, p. 1131, 1990
  5. K. Kondo, M. Okuyama, and Y. Shibata, 'Low firing temperature ceramic material for mulilayer ceramic substrates', Ed. by J. B. Blum and W. R. Cannon, American ceramic society, Westerville, OH, (in Advances in Ceramics), Vol. 19, p. 77, 1986
  6. B. W. Hakki and P. D. Coleman, 'A dielectric resonator method of measuring inductive capacitance in the millimeter range', IRE Trans., Microwave Theory and Tech., Vol. 8, p. 402, 1960
  7. M. Takata and K. Kageyama, 'Microwave characteristics of $A(B^{3+}\;_{1/2}B^{5+}\;_{1/2})O_3$ ceramics (A = Ba, Ca, Sr; $B^{3+}$ = La, Nd, Sm, Yb; $B^{5+}$=Nb, Ta)', J. Am. Ceram. Soc., Vol. 72, No. 10, p. 1955, 1989
  8. K. Hapa, T. Ishii, J. Mashiuyama, and T. Ikeda, 'Dielectric properties of two-phase mixture ceramics composed of rutile and Its compounds', Jpn. J. Appl, Phys., Vol. 31, No. 9(B), p. 3156, 1992
  9. J. M. Wu, M. C. Chang, and P. C. Yao, 'Reaction sequence and effects of calcination and sintering on microwave properties of $[Ba,Sr]O-Sm_2O_3-TiO_2$ ceramics', J. Am. Ceram. Soc., Vol. 73, No.6, p. 1599, 1990
  10. Wakino K, 'Recent development of dielectric resonator materials and filters', Ferro-electrics(in Japan), Vol. 91, p. 68, 1989
  11. S. O. Yoon, D. M. Kim, S. H. Shim, and K. S. Kang, 'Microwave dielectric properties of $(1-x)ZnWO_4-xTiO_2$ ceramics', J of KIEEME (in Korean), Vol. 16, No.5, p. 397, 2003
  12. A. F. Wells, 'Structural inorganic chemistry', Clarendon Press, Oxford, 4th, p. 487, 1975