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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Microwave Dielectric Characteristics of Ba(Mg1/3Nb2/3)O3-La(Mg2/3Nb1/3)O3 Ceramics with Crystal Structure

결정 구조에 따른 Ba(Mg1/3Nb2/3)O3-La(Mg2/3Nb1/3)O3세라믹스의 마이크로파 유전 특성

  • 백종후 (요업기술원 전자소재기술개발사업단) ;
  • 임은경 (요업기술원 전자소재기술개발사업단) ;
  • 이미재 (요업기술원 전자소재기술개발사업단) ;
  • 지미정 (요업기술원 전자소재기술개발사업단) ;
  • 최병현 (요업기술원 전자소재기술개발사업단) ;
  • 김세기 (요업기술원 전자소재기술개발사업단)
  • Published : 2005.01.01
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Abstract

The microwave dielectric properties and their related structural characteristics in solid solutions of (1-$\chi$) Ba($Mg_{1/3}$Nb$_{2/3}$) $O_3$-$\chi$La(Mg$_{2/3}$Nb$_{1}$3) $O_3$(BLMN) have been investigated by measuring the dielectric constant($\varepsilon$r), Q value and temperature coefficient of resonant frequency($\tau$f) and by observing the crystal structure using high resolution transmission electron microscopy (HRTEM). Microwave dielectric properties showed characteristic features for specific composition. Dielectric constant($\varepsilon$$_{r}$) showed maximum value at the composition which corresponds to the phase boundary between 1 : 2 ordered and 1 : 1 ordered structure. The increase in $\varepsilon$$_{r}$ may be caused by the rattling of ions by incorporating smaller ions and the disordered structure. The variation of temperature coefficient of resonant frequency($\tau$$_{f}$) was investigated in terms of oxygen octahedra tilting.dra tilting.

Keywords

References

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