Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Dopants on the Microwave Dielectric Properties of $(1-x)MgTiO_3-xCaTiO_3$ Ceramics

불순물 첨가에 따른 $(1-x)MgTiO_3-xCaTiO_3$ 세라믹스의 마이크로웨이브 유전특성변화

  • 우동찬 (영남대학교 금속공학 및 재료공학부) ;
  • 이희영 (영남대학교 금속공학 및 재료공학부) ;
  • 한주환 (영남대학교 금속공학 및 재료공학부) ;
  • 김태홍 (한국전자통신연구소 통신부품연구실) ;
  • 최태구 (한국전자통신연구소 통신부품연구실)
  • Published : 1997.08.01
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Abstract

The effect of dopant on microwave dielectric properties of (1-x)MgTiO3-xCaTiO3 ceramics, known to be used as microwave dielectric resonators for global positioning system and personal communication system, has been analyzed in terms of variations in defect concentrations and microstructural features with its addition. The addition of dopants was revealed to result in a significant change in the microstructure as well as defect concentration of the ceramics. For instance, the quality factor is proportional to sintered density of the ceramics by inversely proportional to grain size as well as vacancy concentration. Accordingly, it is believed that the dopant effect on the microwave dielectric properties should be separately analyzed with either microstructural change or the change in vacancy concentration.

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References

  1. The Electronic Parts & Components Monthly v.94 no.4 강유전체를 이용한 이동통신용 마이크로파 소자의 개발동향 박창엽
  2. DRF-T-92010 유전체 공진기를 이용한 고주파 통신부품 기술동향 이재신(등)
  3. XXIX-159-1015 v.29 ヂタン酸バリウム 實用化硏究 年報 深尺敦司;佐藤拓郎
  4. Ferroelectrics v.91 Recent Development of Dielectric Resonator Materials and Filters K. Wakino
  5. 한국재료학회지 v.5 no.2 MgTiO₃계 세라믹스의 고주파 유전 특성 김왕섭;김경용
  6. Engineered Materials Handbook v.4 S. J. Schneider Jr.(ed.)
  7. Jpn. J. Appl. Phys. v.26 no.Suppl 26-2 Dielectric properties of$ PbO-ZrO_2-ReOX$Ceramics at Microwave Frequency K. Tatsuki
  8. 세라믹 유전체공학 岡岐淸;이경희(역)
  9. 1976 Joint Convention Record of Four Institute of Electrical Engineers no.235 Dielectric Materials for Dielectric Resonator K. Wakino(et al.)
  10. Ferroelectrics v.133 Magnesium Titanate Microwave Dielectric Ceramics V M. Ferreira;F. Azough;J. L. Baptista;R. Freer
  11. J. Mater. Sci. v.28 Dielectric Spectroscopy of$MgTiO_3$ -Based Ceramics in the 109-1014 Hz Region V. M. Ferrira;J. L. Baptista;S. Kamba;J. Petzelt
  12. Mater. Res. Bull. v.29 no.10 Preparation and Microwave Dielectric Properties of Pure and Doped Magnesium Titanate Ceramics V. M. Ferreira;J. L. Baptista
  13. J. Mater. Res. v.10 no.9 Loss Spectra of Pure and La-Doped MgTiO₃Microwave Ceramics V. M. Ferreira;J. L. Baptista;J. Petzelt;G. A. Komandin;V. V. Voitsekhovskii
  14. IRE Trans. Microwave Theory Tech. v.MTT-8 A Dielectric Resonator Method of Measuring Capacities in the Millimeter Range B. W. Hakki;P. D. Coleman
  15. Presented at the Pacific Rim Ceramic Societies Meeting Microwave Dielectric Properties of MCT Ceramics D. C. Woo(et al.)
  16. 格子振動 W. Cochran
  17. Introduction to Ceramics(Second edition) W. D. Kingery;H. K. Bowen;D. R. Uhlmann
  18. 第11回 電子材料 部會セミナ- ヂタン酸鹽系誘電體のマイグロ波 特性 平原誠一郎(et al.)
  19. J. Am. Ceram. Soc. v.67 no.4 Defect Chemistry of Donor-Doped BaTiO₃ N.-H. Chan;D. M. Smyth
  20. J. Am. Ceram. Soc. v.69 no.6 Compensating Defects in Highly Donor-Doped BaTiO₃ Helen M. Chan;Martin P. Harmer;Donald M. Smyth
  21. 한국재료학회지 v.2 no.3 CaTiO₃에서 양이온 비화학양론 한영호
  22. J. Mater. Sci. v.29 Solubility of CaO in CaTiO₃ M. Ceh;D. Kolar
  23. J. Phys. Chem. Solids. v.30 Diffusion of Point Defects in Calcium Titanate W. L. George;R. E. Grace
  24. J. Phys. Chem. Solids v.30 Formation of Point Defects in Calcium Titanate W. L. George;R E. Grace
  25. 한국재료학회지 v.4 no.7 Ca와 Nb가 첨가된 BaTiO₃의 결합 화학 정재호;한영호;박순자