Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지

Microwave Dielectric Properties of the $BaO-(Nd,Bi)_2 O_3-TiO_2$$_2$ Ceramic for Mobile Communication Component

이동 통신 부품에 이용되는 $BaO-(Nd,Bi)_2 O_3-TiO_2$계 마이크로파 유전체의 유전 특성

  • 윤중락 (명지대 공대 전기공학과) ;
  • 이헌용 (명지대 공대 전기공학과) ;
  • 김경용 (호서대 공대 제어계측공학과) ;
  • 이석원 (호서대 공대 제어계측공학과)
  • Published : 1998.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

The microwave dielectric properties of X BaO-0.15($Nd_{0.87}Bi_{0.13})_2O_3-(0.85-X)TiO_2 (X=0.14~0.17) and 0.16BaO-0.15(Bi_xNd_{1-x})_2O_3-0.69TiO_2$ (X=0.12~0.15) ceramics sintered at 1320~$1380^{\circ}C$ were investigated. The microwave dielectric properties of X BaO-0.15(Nd_{0.87}Bi_{0.13})_2O_3-(0.85-X)TiO_2$ (X=0.14~0.17) can be controlled effectively by adjusting X content : with increasing X from 0.14 to 0.17 both dielectric constant and temperature coefficient of resonant frequency decreased from 94.6 to 86 and from 22 ppm/^${\circ}C to -7 ppm/^{\circ}C$, respectively, while quality factor increased from 1300 to 1920 (at 4GHz). The microwave dielectric properties of 0.16BaO-0.15(Bi_x/Nd_{1-x2}O_3 -0.69TiO_2$ (X=0.12~0.15) can be controlled effectively by adjusting X content : with increasing X from 0.12 to 0.15 both quality factor and temperature coefficient of resonant frequency decreased from 1920 to 1430 and from 9 ppm/^${\circ}C to -10 ppm/^{\circ}C$, respectively, while dielectric constant increased from 87.5 to 92.6.

Keywords

References

  1. Jpn. J. Phys. v.24 no.suppl.24-2 Dielectric Ceramics for Microwave Application H. Ouchi;S. Kawashima
  2. Electronic Ceramics W. Wersing
  3. J. Am. Ceram. Soc. v.67 no.4 Microwave Characteristics (Zr, Sn)TiO₄ and Bao-PbO-Nd₂O₃-TiO₂ Dielectric Resonator K. Wakino;K. Minai;H. Tamura
  4. J.Am.Ceram.Soc.Bull. v.66 no.9 Microwave Dielectric Properties of (Ba, Sr)O-Sm₂O₃-TiO₂Ceramics S.Nishigaki;H.Kato;S.Yano;R.Kamimura
  5. Jpn.J.Appl. Phys. v.30 no.9B Dielectric Properties of Double-Oxide Ceramics in the System Ln₂O₃-TiO₂ (Ln=La,Nd and Sm) J.Takahashi;K.Kageyama;T.Hayashi
  6. Ferroelectrics v.27 High Stability Low Loss Dielectrics in the System BaO-Nd₂O₃-TiO₂-Bi₂O₃ D.Kolar;S.Gaberscek;Z.Stadler;D.Savorov
  7. J.Mater.Res. v.11 no.4 Role of Bi₂O₃in optimizing the dielectric properties of $Ba_{4.5}Nd_9Ti_{18}O_{54}$ based microwave ceramics M.Valant;D.Suvorov;D.Kolar
  8. IRE Trans. on Microwave Theory Tech. v.MTT-8 A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter Range B.W.Hakki;P.D.Coleman
  9. J.Solid State Chem. v.38 Synthesis and Crystal Chemistry of $BaNd_2Ti_{15}O_{14}$ and $Nd_4Ti_9O_{24}$ D.Kolar;S.Gaberscek;Z.Stadler;D.Savorov
  10. Ceram.Int. v.13 Preparation of Nd-doped $Ba_2Ti_9O_{20}$ Ceramics for use in Microwave Applications T.Jaakola;J. MOttOnen;Uusimaki,A.;Rautioaho, R.;Leppavu ori,S.
  11. Jpn.J.Appl.Phy. v.30 no.9B The Effect of Mn Addition on Dielectric Properties and Microstructure of BaO-Nd₂O₃-TiO₂ Ceramics A.Yamada;Y.Utsumi;H.Watarai
  12. Handbook of Chemistry and Physics(66th ed.) CRC Press
  13. 전기학회논문지 v.56 no.5 0.17($Ba_{0.53}Pb_{0.47}$)-0.16Nd₂O₃-0.67TiO₂계 세라믹스의 Mn첨가와 소결에 따른 마이크로파 유전특성 윤중락;이헌용;김경용